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<!-- DFIN ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2019-05-15T10:34:16.4257653+00:00 -->
<!-- Version            : 3.4.7044.22220 -->
<!-- Package ID         : cb736b326cc14e2e82af83e33f15c701 -->
<!-- Copyright (c) 2019 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:type="locator" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangibles, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Assets Net Excluding Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet" xlink:type="locator" xlink:label="us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease and equipment deposits</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet" xlink:to="us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Leases Balance Sheet Assets By Major Class Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:type="locator" xlink:label="us-gaap_OtherAssetsNoncurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="us-gaap_OtherAssetsNoncurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:type="locator" xlink:label="us-gaap_Assets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total assets</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LIABILITIES AND STOCKHOLDERS&#8217; EQUITY</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities And Stockholders Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:type="locator" xlink:label="us-gaap_LiabilitiesCurrentAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current liabilities:</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities Current [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:type="locator" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current portion of long-term debt and capital leases</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:to="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt And Capital Lease Obligations Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:type="locator" xlink:label="us-gaap_AccountsPayableCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable ($2,573 and $1,330 to related party)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableCurrent" xlink:to="us-gaap_AccountsPayableCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued compensation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:to="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Related Liabilities Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other accrued expenses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Accrued Liabilities Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_LiabilitiesCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:type="locator" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noncurrent liabilities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesNoncurrentAbstract" xlink:to="us-gaap_LiabilitiesNoncurrentAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities Noncurrent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:type="locator" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term debt and capital leases, excluding current portion</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:to="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt And Capital Lease Obligations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerLiabilityNoncurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred credits ($6,829 and $7,702 to related party)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerLiabilityNoncurrent" xlink:to="us-gaap_ContractWithCustomerLiabilityNoncurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contract With Customer Liability Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:type="locator" xlink:label="us-gaap_DeferredTaxLiabilitiesNoncurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilitiesNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred income taxes</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:to="us-gaap_DeferredTaxLiabilitiesNoncurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilitiesNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:type="locator" xlink:label="us-gaap_OtherLiabilitiesNoncurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other noncurrent liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherLiabilitiesNoncurrent" xlink:to="us-gaap_OtherLiabilitiesNoncurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:type="locator" xlink:label="us-gaap_LiabilitiesNoncurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total noncurrent liabilities</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Liabilities" xlink:type="locator" xlink:label="us-gaap_Liabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Liabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Liabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:type="locator" xlink:label="us-gaap_CommitmentsAndContingencies" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingencies (Note 13 and Note 14)</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingencies</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_StockholdersEquityAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders&apos; equity:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockValue" xlink:type="locator" xlink:label="us-gaap_PreferredStockValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock of no par value, 5,000,000 shares authorized; no shares issued and outstanding</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStocksIncludingAdditionalPaidInCapital" xlink:type="locator" xlink:label="us-gaap_CommonStocksIncludingAdditionalPaidInCapital" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStocksIncludingAdditionalPaidInCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock of no par value and additional paid-in capital, 125,000,000 shares authorized; 27,969,475 (2019) and 23,902,903 (2018) shares issued and outstanding, 6,780,297 (2019) and 10,614,990 (2018) warrants issued and outstanding</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStocksIncludingAdditionalPaidInCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stocks Including Additional Paid In Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:type="locator" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings Accumulated Deficit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:type="locator" xlink:label="us-gaap_StockholdersEquity" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total stockholders&apos; equity</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities and stockholders&apos; equity</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities And Stockholders Equity</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_ClassOfWarrantsOrRightIssued" xlink:type="locator" xlink:label="mesa_ClassOfWarrantsOrRightIssued" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsPayableRelatedPartiesCurrent" xlink:type="locator" xlink:label="us-gaap_AccountsPayableRelatedPartiesCurrent" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableRelatedPartiesCurrent" xlink:to="us-gaap_AccountsPayableRelatedPartiesCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableRelatedPartiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable Related Parties Current</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_DeferredRevenueAndCreditsRelatedPartiesNonCurrent" xlink:type="locator" xlink:label="mesa_DeferredRevenueAndCreditsRelatedPartiesNonCurrent" />
    <link:label xml:lang="en-US" xlink:label="mesa_DeferredRevenueAndCreditsRelatedPartiesNonCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred credits to related party</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_DeferredRevenueAndCreditsRelatedPartiesNonCurrent" xlink:to="mesa_DeferredRevenueAndCreditsRelatedPartiesNonCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_DeferredRevenueAndCreditsRelatedPartiesNonCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Revenue And Credits Related Parties Non Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockNoParValue" xlink:type="locator" xlink:label="us-gaap_PreferredStockNoParValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockNoParValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, par value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockNoParValue" xlink:to="us-gaap_PreferredStockNoParValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockNoParValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock No Par Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_PreferredStockSharesAuthorized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares authorized</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:type="locator" xlink:label="us-gaap_PreferredStockSharesIssued" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares issued</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesIssued" xlink:to="us-gaap_PreferredStockSharesIssued_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Shares Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:type="locator" xlink:label="us-gaap_PreferredStockSharesOutstanding" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares outstanding</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesOutstanding" xlink:to="us-gaap_PreferredStockSharesOutstanding_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Shares Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockNoParValue" xlink:type="locator" xlink:label="us-gaap_CommonStockNoParValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockNoParValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, no par value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockNoParValue" xlink:to="us-gaap_CommonStockNoParValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockNoParValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock No Par Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesAuthorized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares authorized</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesIssued" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares issued</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesOutstanding" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares outstanding</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_ClassOfWarrantsOrRightIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, warrants issued</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_ClassOfWarrantsOrRightIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrants Or Right Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfWarrantOrRightOutstanding" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, warrants outstanding</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightOutstanding" xlink:to="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Outstanding</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_FlightOperationsExpense" xlink:type="locator" xlink:label="mesa_FlightOperationsExpense" />
    <link:label xml:lang="en-US" xlink:label="mesa_FlightOperationsExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Flight operations expense.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_FlightOperationsExpense" xlink:to="mesa_FlightOperationsExpense_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_AircraftAndTrafficServicing" xlink:type="locator" xlink:label="mesa_AircraftAndTrafficServicing" />
    <link:label xml:lang="en-US" xlink:label="mesa_AircraftAndTrafficServicing_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Aircraft and traffic servicing.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_AircraftAndTrafficServicing" xlink:to="mesa_AircraftAndTrafficServicing_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:type="locator" xlink:label="us-gaap_IncomeStatementAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:type="locator" xlink:label="us-gaap_StatementTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductOrServiceAxis" xlink:type="locator" xlink:label="srt_ProductOrServiceAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductOrServiceAxis" xlink:to="srt_ProductOrServiceAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Product Or Service [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductsAndServicesDomain" xlink:type="locator" xlink:label="srt_ProductsAndServicesDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductsAndServicesDomain" xlink:to="srt_ProductsAndServicesDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Products And Services [Domain]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_ContractRevenueMember" xlink:type="locator" xlink:label="mesa_ContractRevenueMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_ContractRevenueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Contract Revenue [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_ContractRevenueMember" xlink:to="mesa_ContractRevenueMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_ContractRevenueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract Revenue [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_ContractRevenueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contract Revenue [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_PassThroughAndOtherMember" xlink:type="locator" xlink:label="mesa_PassThroughAndOtherMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_PassThroughAndOtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Pass through and other.</link:label>
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    <link:label xml:lang="en-US" xlink:label="mesa_PassThroughAndOtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pass Through and Other [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_PassThroughAndOtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pass Through And Other [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:type="locator" xlink:label="us-gaap_StatementLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenuesAbstract" xlink:type="locator" xlink:label="us-gaap_RevenuesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating revenues:</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenues [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:type="locator" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total operating revenues</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:type="locator" xlink:label="us-gaap_CostsAndExpensesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CostsAndExpensesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating expenses:</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CostsAndExpensesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Costs And Expenses [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_FlightOperationsExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Flight operations</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_FlightOperationsExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Flight Operations Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FuelCosts" xlink:type="locator" xlink:label="us-gaap_FuelCosts" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FuelCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fuel</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FuelCosts" xlink:to="us-gaap_FuelCosts_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FuelCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fuel Costs</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WarrantMember" xlink:type="locator" xlink:label="us-gaap_WarrantMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_WarrantMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Warrants [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantMember" xlink:to="us-gaap_WarrantMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_WarrantMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Warrant [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember" xlink:type="locator" xlink:label="us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock and Additional Paid-In Capital [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember" xlink:to="us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Including Additional Paid In Capital [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:type="locator" xlink:label="us-gaap_RetainedEarningsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retained Earnings [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsMember" xlink:to="us-gaap_RetainedEarningsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharesOutstanding" xlink:type="locator" xlink:label="us-gaap_SharesOutstanding" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance, shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesOutstanding" xlink:to="us-gaap_SharesOutstanding_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Shares Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock compensation expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:type="locator" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repurchased shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRepurchasedDuringPeriodValue" xlink:to="us-gaap_StockRepurchasedDuringPeriodValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchased During Period Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares" xlink:type="locator" xlink:label="us-gaap_StockRepurchasedAndRetiredDuringPeriodShares" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repurchased shares, shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRepurchasedAndRetiredDuringPeriodShares" xlink:to="us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchased And Retired During Period Shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock issuance costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments To Additional Paid In Capital Stock Issued Issuance Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants converted to common stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" xlink:to="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Conversion Of Convertible Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted shares issued</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross" xlink:to="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Restricted Stock Award Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted shares issued, shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross" xlink:to="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Restricted Stock Award Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification" xlink:type="locator" xlink:label="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cumulative effect of change in accounting principle</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification" xlink:to="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net income</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance, shares</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_AmortizationOfUnfavorableLeaseLiabilitiesAndDeferredCredits" xlink:type="locator" xlink:label="mesa_AmortizationOfUnfavorableLeaseLiabilitiesAndDeferredCredits" />
    <link:label xml:lang="en-US" xlink:label="mesa_AmortizationOfUnfavorableLeaseLiabilitiesAndDeferredCredits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Amortization of unfavorable lease liabilities and deferred credits.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_AmortizationOfUnfavorableLeaseLiabilitiesAndDeferredCredits" xlink:to="mesa_AmortizationOfUnfavorableLeaseLiabilitiesAndDeferredCredits_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_AmortizationOfDebtFinancingCostsAndAccretionOfInterestOnNoninterestbearingSubordinatedNotes" xlink:type="locator" xlink:label="mesa_AmortizationOfDebtFinancingCostsAndAccretionOfInterestOnNoninterestbearingSubordinatedNotes" />
    <link:label xml:lang="en-US" xlink:label="mesa_AmortizationOfDebtFinancingCostsAndAccretionOfInterestOnNoninterestbearingSubordinatedNotes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Amortization of debt financing costs and accretion of interest on non-interest-bearing subordinated notes.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_AmortizationOfDebtFinancingCostsAndAccretionOfInterestOnNoninterestbearingSubordinatedNotes" xlink:to="mesa_AmortizationOfDebtFinancingCostsAndAccretionOfInterestOnNoninterestbearingSubordinatedNotes_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_PaymentsForProceedsFromAcquireEquipmentOnLease" xlink:type="locator" xlink:label="mesa_PaymentsForProceedsFromAcquireEquipmentOnLease" />
    <link:label xml:lang="en-US" xlink:label="mesa_PaymentsForProceedsFromAcquireEquipmentOnLease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Payments for (proceeds from) acquire equipment on lease.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_PaymentsForProceedsFromAcquireEquipmentOnLease" xlink:to="mesa_PaymentsForProceedsFromAcquireEquipmentOnLease_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingCashFlowsDirectMethodAbstract" xlink:type="locator" xlink:label="us-gaap_OperatingCashFlowsDirectMethodAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingCashFlowsDirectMethodAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Cash Flows Direct Method [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingCashFlowsDirectMethodAbstract" xlink:to="us-gaap_OperatingCashFlowsDirectMethodAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from operating activities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net income to net cash flows provided by operating activities:</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock compensation expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:type="locator" xlink:label="us-gaap_DeferredIncomeTaxesAndTaxCredits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredIncomeTaxesAndTaxCredits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred income taxes</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:to="us-gaap_DeferredIncomeTaxesAndTaxCredits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredIncomeTaxesAndTaxCredits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Income Taxes And Tax Credits</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_AmortizationOfUnfavorableLeaseLiabilitiesAndDeferredCredits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amortization of unfavorable lease liabilities and deferred credits</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_AmortizationOfUnfavorableLeaseLiabilitiesAndDeferredCredits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Of Unfavorable Lease Liabilities And Deferred Credits</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_AmortizationOfDebtFinancingCostsAndAccretionOfInterestOnNoninterestbearingSubordinatedNotes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of debt financing costs and accretion of interest on non-interest-bearing subordinated notes</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_AmortizationOfDebtFinancingCostsAndAccretionOfInterestOnNoninterestbearingSubordinatedNotes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Of Debt Financing Costs And Accretion Of Interest On Noninterestbearing Subordinated Notes</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loss on extinguishment of debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets" xlink:type="locator" xlink:label="us-gaap_GainLossOnDispositionOfAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">(Gain) loss on disposal of assets</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss On Disposition Of Assets</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInInventories" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from investing activities:</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquireProductiveAssets" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt" xlink:type="locator" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales of investment securities</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Sale Of Available For Sale Securities Debt</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_PaymentsForProceedsFromAcquireEquipmentOnLease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net returns of lease and equipment deposits</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in investing activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from financing activities:</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities" xlink:type="locator" xlink:label="us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:type="locator" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Cash Flow Supplemental Disclosures Table [Text Block]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_AirlineServicesInNumberOfCities" xlink:type="locator" xlink:label="mesa_AirlineServicesInNumberOfCities" />
    <link:label xml:lang="en-US" xlink:label="mesa_AirlineServicesInNumberOfCities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Airline services in number of cities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_AirlineServicesInNumberOfCities" xlink:to="mesa_AirlineServicesInNumberOfCities_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NumberOfDailyDepartures" xlink:type="locator" xlink:label="mesa_NumberOfDailyDepartures" />
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfDailyDepartures_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of daily departures.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NumberOfDailyDepartures" xlink:to="mesa_NumberOfDailyDepartures_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NumberOfEmployees" xlink:type="locator" xlink:label="mesa_NumberOfEmployees" />
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfEmployees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of employees.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NumberOfEmployees" xlink:to="mesa_NumberOfEmployees_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:type="locator" xlink:label="mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" />
    <link:label xml:lang="en-US" xlink:label="mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Organization consolidation and presentation of financial statements.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:to="mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:type="locator" xlink:label="mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" />
    <link:label xml:lang="en-US" xlink:label="mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Organization Consolidation And Presentation Of Financial Statements [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:to="mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization Consolidation And Presentation Of Financial Statements [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Organization Consolidation And Presentation Of Financial Statements [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:type="locator" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SubsidiarySaleOfStockAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiary Sale Of Stock [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="locator" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Name Of Transaction [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IPOMember" xlink:type="locator" xlink:label="us-gaap_IPOMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IPOMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">IPO [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IPOMember" xlink:to="us-gaap_IPOMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IPOMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">I P O [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_UnderwriterOptionsMember" xlink:type="locator" xlink:label="mesa_UnderwriterOptionsMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_UnderwriterOptionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Underwriter Options Member</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_UnderwriterOptionsMember" xlink:to="mesa_UnderwriterOptionsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_UnderwriterOptionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriter Options [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_UnderwriterOptionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Underwriter Options [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_PurchasedDirectlyFromEntityMember" xlink:type="locator" xlink:label="mesa_PurchasedDirectlyFromEntityMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_PurchasedDirectlyFromEntityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchased directly from entity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_PurchasedDirectlyFromEntityMember" xlink:to="mesa_PurchasedDirectlyFromEntityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_PurchasedDirectlyFromEntityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchased Directly From Company [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_PurchasedDirectlyFromEntityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Purchased Directly From Entity [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_PurchasedDirectlyFromSellingShareholdersMember" xlink:type="locator" xlink:label="mesa_PurchasedDirectlyFromSellingShareholdersMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_PurchasedDirectlyFromSellingShareholdersMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchased directly from selling shareholders.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_PurchasedDirectlyFromSellingShareholdersMember" xlink:to="mesa_PurchasedDirectlyFromSellingShareholdersMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_PurchasedDirectlyFromSellingShareholdersMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchased Directly From Selling Shareholders [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_PurchasedDirectlyFromSellingShareholdersMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Purchased Directly From Selling Shareholders [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_FirmSharesAndOptionSharesMember" xlink:type="locator" xlink:label="mesa_FirmSharesAndOptionSharesMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_FirmSharesAndOptionSharesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Firm shares and option shares.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_FirmSharesAndOptionSharesMember" xlink:to="mesa_FirmSharesAndOptionSharesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_FirmSharesAndOptionSharesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Firm Shares and Option Shares [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_FirmSharesAndOptionSharesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Firm Shares And Option Shares [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanNameAxis" xlink:type="locator" xlink:label="us-gaap_PlanNameAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanNameDomain" xlink:type="locator" xlink:label="us-gaap_PlanNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameDomain" xlink:to="us-gaap_PlanNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_TwoThousandAndEighteenEquityIncentivePlanMember" xlink:type="locator" xlink:label="mesa_TwoThousandAndEighteenEquityIncentivePlanMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_TwoThousandAndEighteenEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">2018 equity incentive plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_TwoThousandAndEighteenEquityIncentivePlanMember" xlink:to="mesa_TwoThousandAndEighteenEquityIncentivePlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_TwoThousandAndEighteenEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2018 Equity Incentive Plan [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_TwoThousandAndEighteenEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand And Eighteen Equity Incentive Plan [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_TwoThousandElevenAndTwoThousandSeventeenEquityIncentivePlanMember" xlink:type="locator" xlink:label="mesa_TwoThousandElevenAndTwoThousandSeventeenEquityIncentivePlanMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_TwoThousandElevenAndTwoThousandSeventeenEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand eleven and two thousand seventeen equity incentive plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_TwoThousandElevenAndTwoThousandSeventeenEquityIncentivePlanMember" xlink:to="mesa_TwoThousandElevenAndTwoThousandSeventeenEquityIncentivePlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_TwoThousandElevenAndTwoThousandSeventeenEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2011 and 2017 Plans [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_TwoThousandElevenAndTwoThousandSeventeenEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Eleven And Two Thousand Seventeen Equity Incentive Plan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardTypeAxis" xlink:type="locator" xlink:label="us-gaap_AwardTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_AwardTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Award Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Award</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedStockMember" xlink:type="locator" xlink:label="us-gaap_RestrictedStockMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockMember" xlink:to="us-gaap_RestrictedStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TitleOfIndividualAxis" xlink:type="locator" xlink:label="us-gaap_TitleOfIndividualAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TitleOfIndividualAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of Individual</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TitleOfIndividualAxis" xlink:to="us-gaap_TitleOfIndividualAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TitleOfIndividualAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Title Of Individual [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:type="locator" xlink:label="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Relationship to Entity</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:to="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Title Of Individual With Relationship To Entity [Domain]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_EmployeesMember" xlink:type="locator" xlink:label="mesa_EmployeesMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_EmployeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Employees member.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_EmployeesMember" xlink:to="mesa_EmployeesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_EmployeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employees [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_EmployeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employees [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_OwnershipAxis" xlink:type="locator" xlink:label="srt_OwnershipAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_OwnershipAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_OwnershipAxis" xlink:to="srt_OwnershipAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_OwnershipAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Ownership [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_OwnershipDomain" xlink:type="locator" xlink:label="srt_OwnershipDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_OwnershipDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_OwnershipDomain" xlink:to="srt_OwnershipDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_OwnershipDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Ownership [Domain]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_AmericanAirlinesIncMember" xlink:type="locator" xlink:label="mesa_AmericanAirlinesIncMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_AmericanAirlinesIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">American Airlines Inc.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_AmericanAirlinesIncMember" xlink:to="mesa_AmericanAirlinesIncMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_AmericanAirlinesIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">American Airlines Inc. [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_AmericanAirlinesIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">American Airlines Inc [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_CRJ900AircraftMember" xlink:type="locator" xlink:label="mesa_CRJ900AircraftMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_CRJ900AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">CRJ-900 Aircraft.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_CRJ900AircraftMember" xlink:to="mesa_CRJ900AircraftMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_CRJ900AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CRJ-900 Aircraft [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_CRJ900AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">C R J900 Aircraft [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:type="locator" xlink:label="srt_RangeAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Range</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Range [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:type="locator" xlink:label="srt_RangeMember" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Range</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeMember" xlink:to="srt_RangeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Range [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:type="locator" xlink:label="srt_MinimumMember" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumMember" xlink:to="srt_MinimumMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:type="locator" xlink:label="srt_MaximumMember" />
    <link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MaximumMember" xlink:to="srt_MaximumMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_CRJ700AircraftMember" xlink:type="locator" xlink:label="mesa_CRJ700AircraftMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_CRJ700AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">CRJ-700 Aircraft.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_CRJ700AircraftMember" xlink:to="mesa_CRJ700AircraftMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_CRJ700AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CRJ-700 Aircraft [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_CRJ700AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">C R J700 Aircraft [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_E175AircraftMember" xlink:type="locator" xlink:label="mesa_E175AircraftMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_E175AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">E-175 Aircraft.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_E175AircraftMember" xlink:to="mesa_E175AircraftMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_E175AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">E-175 Aircraft [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_E175AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">E175 Aircraft [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MajorCustomersAxis" xlink:type="locator" xlink:label="srt_MajorCustomersAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_MajorCustomersAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MajorCustomersAxis" xlink:to="srt_MajorCustomersAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_MajorCustomersAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Major Customers [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:type="locator" xlink:label="srt_NameOfMajorCustomerDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_NameOfMajorCustomerDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_NameOfMajorCustomerDomain" xlink:to="srt_NameOfMajorCustomerDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_NameOfMajorCustomerDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Name Of Major Customer [Domain]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_UnitedAirlinesIncMember" xlink:type="locator" xlink:label="mesa_UnitedAirlinesIncMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_UnitedAirlinesIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">United Airlines, Inc.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_UnitedAirlinesIncMember" xlink:to="mesa_UnitedAirlinesIncMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_UnitedAirlinesIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">United [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_UnitedAirlinesIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">United Airlines Inc [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:type="locator" xlink:label="srt_ConsolidatedEntitiesAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidated Entities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Entities [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:type="locator" xlink:label="srt_ConsolidatedEntitiesDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidated Entities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ConsolidatedEntitiesDomain" xlink:to="srt_ConsolidatedEntitiesDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Entities [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ParentCompanyMember" xlink:type="locator" xlink:label="srt_ParentCompanyMember" />
    <link:label xml:lang="en-US" xlink:label="srt_ParentCompanyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mesa [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ParentCompanyMember" xlink:to="srt_ParentCompanyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ParentCompanyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Parent Company [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization Consolidation And Presentation Of Financial Statements [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Organization Consolidation And Presentation Of Financial Statements [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NumberOfStatesInWhichEntityOperates" xlink:type="locator" xlink:label="us-gaap_NumberOfStatesInWhichEntityOperates" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfStatesInWhichEntityOperates_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of states in which entity operates</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfStatesInWhichEntityOperates" xlink:to="us-gaap_NumberOfStatesInWhichEntityOperates_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfStatesInWhichEntityOperates_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of States In Which Entity Operates</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NumberOfAircraftOperated" xlink:type="locator" xlink:label="us-gaap_NumberOfAircraftOperated" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfAircraftOperated_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of aircrafts operated</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfAircraftOperated" xlink:to="us-gaap_NumberOfAircraftOperated_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfAircraftOperated_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Aircraft Operated</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_AirlineServicesInNumberOfCities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of cities in which entity operates</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_AirlineServicesInNumberOfCities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Airline Services In Number Of Cities</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfDailyDepartures_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of daily departures</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfDailyDepartures_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Daily Departures</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfEmployees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of employees</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfEmployees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Employees</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityNoteStockSplit" xlink:type="locator" xlink:label="us-gaap_StockholdersEquityNoteStockSplit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityNoteStockSplit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock, stock split</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteStockSplit" xlink:to="us-gaap_StockholdersEquityNoteStockSplit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityNoteStockSplit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity Note Stock Split</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:type="locator" xlink:label="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock split ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:to="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity Note Stock Split Conversion Ratio1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock issued during period, shares, new issues</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares New Issues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharesIssuedPricePerShare" xlink:type="locator" xlink:label="us-gaap_SharesIssuedPricePerShare" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued, price per share</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssuedPricePerShare" xlink:to="us-gaap_SharesIssuedPricePerShare_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued Price Per Share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceInitialPublicOffering" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceInitialPublicOffering_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross proceeds of initial public offering</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceInitialPublicOffering" xlink:to="us-gaap_ProceedsFromIssuanceInitialPublicOffering_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceInitialPublicOffering_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Initial Public Offering</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_ProceedsFromIssuanceInitialPublicOfferingNetOfIssuanceCosts" xlink:type="locator" xlink:label="mesa_ProceedsFromIssuanceInitialPublicOfferingNetOfIssuanceCosts" />
    <link:label xml:lang="en-US" xlink:label="mesa_ProceedsFromIssuanceInitialPublicOfferingNetOfIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance initial public offering net of issuance costs.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_ProceedsFromIssuanceInitialPublicOfferingNetOfIssuanceCosts" xlink:to="mesa_ProceedsFromIssuanceInitialPublicOfferingNetOfIssuanceCosts_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_UnderwritingDiscountsAndCommissions" xlink:type="locator" xlink:label="mesa_UnderwritingDiscountsAndCommissions" />
    <link:label xml:lang="en-US" xlink:label="mesa_UnderwritingDiscountsAndCommissions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Underwriting discounts and commissions.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_UnderwritingDiscountsAndCommissions" xlink:to="mesa_UnderwritingDiscountsAndCommissions_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_OfferingCosts" xlink:type="locator" xlink:label="mesa_OfferingCosts" />
    <link:label xml:lang="en-US" xlink:label="mesa_OfferingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offering costs.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_OfferingCosts" xlink:to="mesa_OfferingCosts_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_ProceedsFromIssuanceInitialPublicOfferingNetOfIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds from initial public offering</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_ProceedsFromIssuanceInitialPublicOfferingNetOfIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Initial Public Offering Net Of Issuance Costs</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_UnderwritingDiscountsAndCommissions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriting discounts and commissions</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_UnderwritingDiscountsAndCommissions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Underwriting Discounts And Commissions</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_OfferingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Offering costs</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_OfferingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offering Costs</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_StockWithheldToCoverTaxWithholdingRequirementsUponVestingToRestrictedStockUnitsShares" xlink:type="locator" xlink:label="mesa_StockWithheldToCoverTaxWithholdingRequirementsUponVestingToRestrictedStockUnitsShares" />
    <link:label xml:lang="en-US" xlink:label="mesa_StockWithheldToCoverTaxWithholdingRequirementsUponVestingToRestrictedStockUnitsShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock Withheld To Cover Tax Withholding Requirements Upon Vesting To Restricted Stock Units Shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_StockWithheldToCoverTaxWithholdingRequirementsUponVestingToRestrictedStockUnitsShares" xlink:to="mesa_StockWithheldToCoverTaxWithholdingRequirementsUponVestingToRestrictedStockUnitsShares_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnitsAndRestrictedStockUnits" xlink:type="locator" xlink:label="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnitsAndRestrictedStockUnits" />
    <link:label xml:lang="en-US" xlink:label="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnitsAndRestrictedStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of stock upon cancellation of existing unvested restricted phantom stock units and restricted stock units.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnitsAndRestrictedStockUnits" xlink:to="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnitsAndRestrictedStockUnits_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnits" xlink:type="locator" xlink:label="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnits" />
    <link:label xml:lang="en-US" xlink:label="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of stock upon cancellation of existing unvested restricted phantom stock units.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnits" xlink:to="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnits_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedStock" xlink:type="locator" xlink:label="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedStock" />
    <link:label xml:lang="en-US" xlink:label="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of stock upon cancellation of existing unvested restricted stock.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedStock" xlink:to="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedStock_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Shares, Granted</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Shares, vested</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_StockWithheldToCoverTaxWithholdingRequirementsUponVestingToRestrictedStockUnitsShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock withheld to cover tax withholding requirements upon vesting to restricted stock units shares</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_StockWithheldToCoverTaxWithholdingRequirementsUponVestingToRestrictedStockUnitsShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Withheld To Cover Tax Withholding Requirements Upon Vesting To Restricted Stock Units Shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings" xlink:type="locator" xlink:label="us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted stock, shares issued net of shares for tax withholdings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings" xlink:to="us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Shares Issued Net Of Shares For Tax Withholdings</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnitsAndRestrictedStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional restricted common stock shares issued</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnitsAndRestrictedStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Stock Upon Cancellation Of Existing Unvested Restricted Phantom Stock Units And Restricted Stock Units</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cancellation of common stock shares existing unvested restricted phantom units</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedPhantomStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Stock Upon Cancellation Of Existing Unvested Restricted Phantom Stock Units</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cancellation of common stock shares existing of unvested restricted stock</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_IssuanceOfStockUponCancellationOfExistingUnvestedRestrictedStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Stock Upon Cancellation Of Existing Unvested Restricted Stock</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_CapacityPurchaseAgreementExpirationYear" xlink:type="locator" xlink:label="mesa_CapacityPurchaseAgreementExpirationYear" />
    <link:label xml:lang="en-US" xlink:label="mesa_CapacityPurchaseAgreementExpirationYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Capacity purchase agreement expiration year.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_CapacityPurchaseAgreementExpirationYear" xlink:to="mesa_CapacityPurchaseAgreementExpirationYear_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_MaximumNumberOfAircraftToPermanentlyWithdrawInTheEventCompanyFailsToMeetNewOrRevisePerformanceMetrics" xlink:type="locator" xlink:label="mesa_MaximumNumberOfAircraftToPermanentlyWithdrawInTheEventCompanyFailsToMeetNewOrRevisePerformanceMetrics" />
    <link:label xml:lang="en-US" xlink:label="mesa_MaximumNumberOfAircraftToPermanentlyWithdrawInTheEventCompanyFailsToMeetNewOrRevisePerformanceMetrics_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum number of aircraft to permanently withdraw in the event company fails to meet new/ revise performance metrics.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_MaximumNumberOfAircraftToPermanentlyWithdrawInTheEventCompanyFailsToMeetNewOrRevisePerformanceMetrics" xlink:to="mesa_MaximumNumberOfAircraftToPermanentlyWithdrawInTheEventCompanyFailsToMeetNewOrRevisePerformanceMetrics_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NumberOfAircraftConvertedToBeUtilizedAsOperationalSpares" xlink:type="locator" xlink:label="mesa_NumberOfAircraftConvertedToBeUtilizedAsOperationalSpares" />
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftConvertedToBeUtilizedAsOperationalSpares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of aircraft converted to be utilized as operational spares.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NumberOfAircraftConvertedToBeUtilizedAsOperationalSpares" xlink:to="mesa_NumberOfAircraftConvertedToBeUtilizedAsOperationalSpares_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:type="locator" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByParent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByParent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:to="us-gaap_MinorityInterestOwnershipPercentageByParent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByParent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minority Interest Ownership Percentage By Parent</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_CapacityPurchaseAgreementExpirationYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capacity purchase agreement, expiration year</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_CapacityPurchaseAgreementExpirationYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capacity Purchase Agreement Expiration Year</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_MaximumNumberOfAircraftToPermanentlyWithdrawInTheEventCompanyFailsToMeetNewOrRevisePerformanceMetrics_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum number of aircraft to permanently withdraw in the event company fails to meet new/ revise performance metrics</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_MaximumNumberOfAircraftToPermanentlyWithdrawInTheEventCompanyFailsToMeetNewOrRevisePerformanceMetrics_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Number Of Aircraft To Permanently Withdraw In The Event Company Fails To Meet New Or Revise Performance Metrics</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftConvertedToBeUtilizedAsOperationalSpares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of aircraft converted to be utilized as operational spares</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftConvertedToBeUtilizedAsOperationalSpares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Aircraft Converted To Be Utilized As Operational Spares</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_EarlyTerminationRightExpirationMonthYear" xlink:type="locator" xlink:label="mesa_EarlyTerminationRightExpirationMonthYear" />
    <link:label xml:lang="en-US" xlink:label="mesa_EarlyTerminationRightExpirationMonthYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Early termination right, expiration month year.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_EarlyTerminationRightExpirationMonthYear" xlink:to="mesa_EarlyTerminationRightExpirationMonthYear_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NumberOfExtensionForRenewal" xlink:type="locator" xlink:label="mesa_NumberOfExtensionForRenewal" />
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfExtensionForRenewal_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of extension for renewal.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NumberOfExtensionForRenewal" xlink:to="mesa_NumberOfExtensionForRenewal_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_RenewalTermExtensionPeriod" xlink:type="locator" xlink:label="mesa_RenewalTermExtensionPeriod" />
    <link:label xml:lang="en-US" xlink:label="mesa_RenewalTermExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Renewal term extension period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_RenewalTermExtensionPeriod" xlink:to="mesa_RenewalTermExtensionPeriod_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_AggregateExtensionPeriod" xlink:type="locator" xlink:label="mesa_AggregateExtensionPeriod" />
    <link:label xml:lang="en-US" xlink:label="mesa_AggregateExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Aggregate extension period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_AggregateExtensionPeriod" xlink:to="mesa_AggregateExtensionPeriod_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NoticePeriodForTerminationOfAgreement" xlink:type="locator" xlink:label="mesa_NoticePeriodForTerminationOfAgreement" />
    <link:label xml:lang="en-US" xlink:label="mesa_NoticePeriodForTerminationOfAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Notice period for termination of agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NoticePeriodForTerminationOfAgreement" xlink:to="mesa_NoticePeriodForTerminationOfAgreement_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_EarlyTerminationRightExpirationMonthYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Early termination right, expiration period</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_EarlyTerminationRightExpirationMonthYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Early Termination Right Expiration Month Year</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfExtensionForRenewal_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of extension</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfExtensionForRenewal_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Extension For Renewal</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_RenewalTermExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Renewal term extension period</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_RenewalTermExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Renewal Term Extension Period</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_AggregateExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate extension period</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_AggregateExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Aggregate Extension Period</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NoticePeriodForTerminationOfAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notice period for termination of agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NoticePeriodForTerminationOfAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Notice Period For Termination Of Agreement</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForLeasingCosts" xlink:type="locator" xlink:label="us-gaap_PaymentsForLeasingCosts" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForLeasingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment of lease cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForLeasingCosts" xlink:to="us-gaap_PaymentsForLeasingCosts_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForLeasingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments For Leasing Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeaseLeaseIncome" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLeaseIncome" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLeaseIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease revenue</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLeaseIncome" xlink:to="us-gaap_OperatingLeaseLeaseIncome_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLeaseIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Lease Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiability" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current and non-current deferred credit balances</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerLiability" xlink:to="us-gaap_ContractWithCustomerLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contract With Customer Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerLiabilityRevenueRecognized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recognized deferred credits to revenue</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:to="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contract With Customer Liability Revenue Recognized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerAssetNet" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerAssetNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerAssetNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract assets balances</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntangibleAssetsGrossExcludingGoodwill" xlink:to="us-gaap_IntangibleAssetsGrossExcludingGoodwill_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IntangibleAssetsGrossExcludingGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Assets Gross Excluding Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated amortization</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Accumulated Amortization</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:type="locator" xlink:label="us-gaap_AmortizationOfIntangibleAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expense recognized</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfIntangibleAssets" xlink:to="us-gaap_AmortizationOfIntangibleAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Of Intangible Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expense for remainder of 2019</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expense for 2020</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expense for 2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expense for 2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expense for 2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Year Five</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_UnutilizedManufacturerCredits" xlink:type="locator" xlink:label="mesa_UnutilizedManufacturerCredits" />
    <link:label xml:lang="en-US" xlink:label="mesa_UnutilizedManufacturerCredits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Unutilized manufacturer credits.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_UnutilizedManufacturerCredits" xlink:to="mesa_UnutilizedManufacturerCredits_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetRelatedDisclosuresAbstract" xlink:type="locator" xlink:label="us-gaap_BalanceSheetRelatedDisclosuresAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BalanceSheetRelatedDisclosuresAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Balance Sheet Related Disclosures [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetRelatedDisclosuresAbstract" xlink:to="us-gaap_BalanceSheetRelatedDisclosuresAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CondensedBalanceSheetStatementTable" xlink:type="locator" xlink:label="srt_CondensedBalanceSheetStatementTable" />
    <link:label xml:lang="en-US" xlink:label="srt_CondensedBalanceSheetStatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Condensed Balance Sheet Statement [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CondensedBalanceSheetStatementTable" xlink:to="srt_CondensedBalanceSheetStatementTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_CondensedBalanceSheetStatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Condensed Balance Sheet Statement [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment By Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Type [Domain]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_AircraftAndOtherFlightEquipmentSubstantiallyPledgedMember" xlink:type="locator" xlink:label="mesa_AircraftAndOtherFlightEquipmentSubstantiallyPledgedMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_AircraftAndOtherFlightEquipmentSubstantiallyPledgedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Aircraft and Other Flight Equipment Substantially Pledged [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_AircraftAndOtherFlightEquipmentSubstantiallyPledgedMember" xlink:to="mesa_AircraftAndOtherFlightEquipmentSubstantiallyPledgedMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_AircraftAndOtherFlightEquipmentSubstantiallyPledgedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aircraft and Other Flight Equipment Substantially Pledged [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_AircraftAndOtherFlightEquipmentSubstantiallyPledgedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Aircraft And Other Flight Equipment Substantially Pledged [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherMachineryAndEquipmentMember" xlink:type="locator" xlink:label="us-gaap_OtherMachineryAndEquipmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherMachineryAndEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Machinery and Equipment [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherMachineryAndEquipmentMember" xlink:to="us-gaap_OtherMachineryAndEquipmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherMachineryAndEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Machinery And Equipment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:type="locator" xlink:label="us-gaap_LeaseholdImprovementsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leasehold Improvements [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseholdImprovementsMember" xlink:to="us-gaap_LeaseholdImprovementsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Leasehold Improvements [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VehiclesMember" xlink:type="locator" xlink:label="us-gaap_VehiclesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VehiclesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vehicles [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VehiclesMember" xlink:to="us-gaap_VehiclesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VehiclesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Vehicles [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BuildingMember" xlink:type="locator" xlink:label="us-gaap_BuildingMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BuildingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Building [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BuildingMember" xlink:to="us-gaap_BuildingMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BuildingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Building [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:type="locator" xlink:label="us-gaap_FurnitureAndFixturesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Furniture and Fixtures [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FurnitureAndFixturesMember" xlink:to="us-gaap_FurnitureAndFixturesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Furniture And Fixtures [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CondensedBalanceSheetStatementsCaptionsLineItems" xlink:type="locator" xlink:label="srt_CondensedBalanceSheetStatementsCaptionsLineItems" />
    <link:label xml:lang="en-US" xlink:label="srt_CondensedBalanceSheetStatementsCaptionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Condensed Balance Sheet Statements Captions [Line Items]</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AirlineRelatedInventoryNetAbstract" xlink:type="locator" xlink:label="us-gaap_AirlineRelatedInventoryNetAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AirlineRelatedInventoryNetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expendable parts and supplies, net:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AirlineRelatedInventoryNetAbstract" xlink:to="us-gaap_AirlineRelatedInventoryNetAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AirlineRelatedInventoryNetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Airline Related Inventory Net [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AirlineRelatedInventory" xlink:type="locator" xlink:label="us-gaap_AirlineRelatedInventory" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AirlineRelatedInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expendable parts and supplies</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AirlineRelatedInventory" xlink:to="us-gaap_AirlineRelatedInventory_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AirlineRelatedInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Airline Related Inventory</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AirlineRelatedInventoryValuationReserves" xlink:type="locator" xlink:label="us-gaap_AirlineRelatedInventoryValuationReserves" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AirlineRelatedInventoryValuationReserves_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: obsolescence and other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AirlineRelatedInventoryValuationReserves" xlink:to="us-gaap_AirlineRelatedInventoryValuationReserves_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AirlineRelatedInventoryValuationReserves_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Airline Related Inventory Valuation Reserves</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_AirlineRelatedInventoryNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Expendable parts and supplies, net</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidRent" xlink:type="locator" xlink:label="us-gaap_PrepaidRent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidRent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid aircraft rent</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidRent" xlink:to="us-gaap_PrepaidRent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidRent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Rent</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_UnutilizedManufacturerCredits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unutilized manufacturer credits</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_UnutilizedManufacturerCredits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unutilized Manufacturer Credits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredOfferingCosts" xlink:type="locator" xlink:label="us-gaap_DeferredOfferingCosts" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredOfferingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred offering and reimbursed costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredOfferingCosts" xlink:to="us-gaap_DeferredOfferingCosts_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredOfferingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Offering Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:type="locator" xlink:label="us-gaap_OtherAssetsCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsCurrent" xlink:to="us-gaap_OtherAssetsCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets Current</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Prepaid expenses and other current assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNetAbstract" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentNetAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment, net:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNetAbstract" xlink:to="us-gaap_PropertyPlantAndEquipmentNetAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Net [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment-gross</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: accumulated depreciation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Depreciation Depletion And Amortization Property Plant And Equipment</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property and equipment-net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:type="locator" xlink:label="us-gaap_AccruedLiabilitiesCurrentAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedLiabilitiesCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other accrued expenses:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:to="us-gaap_AccruedLiabilitiesCurrentAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedLiabilitiesCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities Current [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent" xlink:type="locator" xlink:label="us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued property taxes</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent" xlink:to="us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrual For Taxes Other Than Income Taxes Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepositLiabilitiesAccruedInterest" xlink:type="locator" xlink:label="us-gaap_DepositLiabilitiesAccruedInterest" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositLiabilitiesAccruedInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepositLiabilitiesAccruedInterest" xlink:to="us-gaap_DepositLiabilitiesAccruedInterest_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositLiabilitiesAccruedInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deposit Liabilities Accrued Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedVacationCurrent" xlink:type="locator" xlink:label="us-gaap_AccruedVacationCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedVacationCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued vacation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedVacationCurrent" xlink:to="us-gaap_AccruedVacationCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedVacationCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Vacation Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedUtilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_AccruedUtilitiesCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedUtilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued wheels, brakes and tires</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedUtilitiesCurrent" xlink:to="us-gaap_AccruedUtilitiesCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedUtilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Utilities Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherSundryLiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_OtherSundryLiabilitiesCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherSundryLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherSundryLiabilitiesCurrent" xlink:to="us-gaap_OtherSundryLiabilitiesCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherSundryLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Sundry Liabilities Current</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other accrued expenses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Depreciation" xlink:type="locator" xlink:label="us-gaap_Depreciation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Depreciation" xlink:to="us-gaap_Depreciation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_AmortizationOfUnfavorableLeaseLiability" xlink:type="locator" xlink:label="mesa_AmortizationOfUnfavorableLeaseLiability" />
    <link:label xml:lang="en-US" xlink:label="mesa_AmortizationOfUnfavorableLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Amortization of unfavorable lease liability.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_AmortizationOfUnfavorableLeaseLiability" xlink:to="mesa_AmortizationOfUnfavorableLeaseLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_AmortizationOfUnfavorableLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of unfavorable lease liability</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_AmortizationOfUnfavorableLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Of Unfavorable Lease Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebt" xlink:type="locator" xlink:label="us-gaap_LongTermDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term debt, including current maturities, carrying value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_LongTermDebt_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtFairValue" xlink:type="locator" xlink:label="us-gaap_LongTermDebtFairValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term debt, including current maturities, fair value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtFairValue" xlink:to="us-gaap_LongTermDebtFairValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument, Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="us-gaap_DebtInstrumentNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Name [Domain]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingAircraftDueTwoThousandNineteenMember" xlink:type="locator" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingAircraftDueTwoThousandNineteenMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingAircraftDueTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Notes payable to financial institution, collateralized by the underlying aircraft, due 2019.</link:label>
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    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingAircraftDueTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes Payable to Financial Institution, Collateralized by the Underlying Aircraft, Due 2019 [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingAircraftDueTwoThousandTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Notes payable to financial institution, collateralized by the underlying aircraft, due 2022.</link:label>
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    <link:loc xlink:href="mesa-20190331.xsd#mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingAircraftDueTwoThousandTwentyFourMember" xlink:type="locator" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingAircraftDueTwoThousandTwentyFourMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingAircraftDueTwoThousandTwentyFourMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Notes payable to financial institution, collateralized by the underlying aircraft, due 2024.</link:label>
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    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingAircraftDueTwoThousandTwentyFourMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes Payable to Financial Institution, Collateralized by the Underlying Aircraft, Due 2024 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingAircraftDueTwoThousandTwentyFourMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable To Financial Institution Collateralized By Underlying Aircraft Due Two Thousand Twenty Four [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentySevenMember" xlink:type="locator" xlink:label="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentySevenMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentySevenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior and subordinated notes payable to secured parties, collateralized by the underlying aircraft, due 2027.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentySevenMember" xlink:to="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentySevenMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentySevenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior and Subordinated Notes Payable to Secured Parties, Collateralized by the Underlying Aircraft, Due 2027 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentySevenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior And Subordinated Notes Payable To Secured Parties Collateralized By Underlying Aircraft Due Two Thousand Twenty Seven [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember" xlink:type="locator" xlink:label="mesa_NotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Notes payable to secured parties, collateralized by the underlying aircraft, due 2028.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember" xlink:to="mesa_NotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes Payable to Secured Parties, Collateralized by the Underlying Aircraft, Due 2028 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable To Secured Parties Collateralized By Underlying Aircraft Due Two Thousand Twenty Eight [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember" xlink:type="locator" xlink:label="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior and subordinated notes payable to secured parties, collateralized by the underlying aircraft, due 2028.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember" xlink:to="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior and Subordinated Notes Payable to Secured Parties, Collateralized by the Underlying Aircraft, Due 2028 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior And Subordinated Notes Payable To Secured Parties Collateralized By Underlying Aircraft Due Two Thousand Twenty Eight [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyTwoMember" xlink:type="locator" xlink:label="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyTwoMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior and subordinated notes payable to secured parties, collateralized by the underlying aircraft, due 2022.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyTwoMember" xlink:to="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyTwoMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior and Subordinated Notes Payable to Secured Parties, Collateralized by the Underlying Aircraft, Due 2022 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorAndSubordinatedNotesPayableToSecuredPartiesCollateralizedByUnderlyingAircraftDueTwoThousandTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior And Subordinated Notes Payable To Secured Parties Collateralized By Underlying Aircraft Due Two Thousand Twenty Two [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyTwoMember" xlink:type="locator" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyTwoMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Notes payable to financial institution, collateralized by the underlying equipment, due 2022.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyTwoMember" xlink:to="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyTwoMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes Payable to Financial Institution, Collateralized by the Underlying Equipment, Due 2022 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable To Financial Institution Collateralized By Underlying Equipment Due Two Thousand Twenty Two [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyMember" xlink:type="locator" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Notes payable to financial institution, collateralized by the underlying equipment, due 2020.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyMember" xlink:to="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes Payable to Financial Institution, Collateralized by the Underlying Equipment, Due 2020 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable To Financial Institution Collateralized By Underlying Equipment Due Two Thousand Twenty [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NotesPayableToFinancialInstitutionDueTwoThousandTwentyMember" xlink:type="locator" xlink:label="mesa_NotesPayableToFinancialInstitutionDueTwoThousandTwentyMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionDueTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Notes payable to financial institution due 2020.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NotesPayableToFinancialInstitutionDueTwoThousandTwentyMember" xlink:to="mesa_NotesPayableToFinancialInstitutionDueTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionDueTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes Payable to Financial Institution Due 2020 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionDueTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable To Financial Institution Due Two Thousand Twenty [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NotesPayableToFinancialInstitutionDueTwoThousandNineteenMember" xlink:type="locator" xlink:label="mesa_NotesPayableToFinancialInstitutionDueTwoThousandNineteenMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionDueTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Notes payable to financial institution due 2019.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NotesPayableToFinancialInstitutionDueTwoThousandNineteenMember" xlink:to="mesa_NotesPayableToFinancialInstitutionDueTwoThousandNineteenMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionDueTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes Payable to Financial Institution Due 2019 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionDueTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable To Financial Institution Due Two Thousand Nineteen [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_WorkingCapitalDrawLoanCollateralizedByCertainFlightEquipmentAndSparePartsMember" xlink:type="locator" xlink:label="mesa_WorkingCapitalDrawLoanCollateralizedByCertainFlightEquipmentAndSparePartsMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_WorkingCapitalDrawLoanCollateralizedByCertainFlightEquipmentAndSparePartsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Working capital draw loan, collateralized by certain flight equipment and spare parts.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_WorkingCapitalDrawLoanCollateralizedByCertainFlightEquipmentAndSparePartsMember" xlink:to="mesa_WorkingCapitalDrawLoanCollateralizedByCertainFlightEquipmentAndSparePartsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_WorkingCapitalDrawLoanCollateralizedByCertainFlightEquipmentAndSparePartsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Working Capital Draw Loan, Collateralized by Certain Flight Equipment and Spare Parts [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_WorkingCapitalDrawLoanCollateralizedByCertainFlightEquipmentAndSparePartsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Working Capital Draw Loan Collateralized By Certain Flight Equipment And Spare Parts [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_OtherObligationsDueToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyThreeMember" xlink:type="locator" xlink:label="mesa_OtherObligationsDueToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyThreeMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_OtherObligationsDueToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other obligations due to financial institution, collateralized by the underlying equipment, due 2023.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_OtherObligationsDueToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyThreeMember" xlink:to="mesa_OtherObligationsDueToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyThreeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_OtherObligationsDueToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Obligations Due to Financial Institution, Collateralized by the Underlying Equipment, Due 2023 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_OtherObligationsDueToFinancialInstitutionCollateralizedByUnderlyingEquipmentDueTwoThousandTwentyThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Obligations Due To Financial Institution Collateralized By Underlying Equipment Due Two Thousand Twenty Three [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NotesPayableToFinancialInstitutionCollateralizedByTheUnderlyingEquipmentDueTwoThousandTwentyFourMember" xlink:type="locator" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByTheUnderlyingEquipmentDueTwoThousandTwentyFourMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByTheUnderlyingEquipmentDueTwoThousandTwentyFourMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Notes payable to financial institution, collateralized by the underlying equipment, due 2024.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NotesPayableToFinancialInstitutionCollateralizedByTheUnderlyingEquipmentDueTwoThousandTwentyFourMember" xlink:to="mesa_NotesPayableToFinancialInstitutionCollateralizedByTheUnderlyingEquipmentDueTwoThousandTwentyFourMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByTheUnderlyingEquipmentDueTwoThousandTwentyFourMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes Payable to Financial Institution, Collateralized by the Underlying Equipment, Due 2024 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NotesPayableToFinancialInstitutionCollateralizedByTheUnderlyingEquipmentDueTwoThousandTwentyFourMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable To Financial Institution Collateralized By The Underlying Equipment Due Two Thousand Twenty Four [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FlightEquipmentMember" xlink:type="locator" xlink:label="us-gaap_FlightEquipmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FlightEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Flight Equipment [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FlightEquipmentMember" xlink:to="us-gaap_FlightEquipmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FlightEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Flight Equipment [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_FlightEquipmentMaintenanceMember" xlink:type="locator" xlink:label="mesa_FlightEquipmentMaintenanceMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_FlightEquipmentMaintenanceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Flight equipment maintenance.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_FlightEquipmentMaintenanceMember" xlink:to="mesa_FlightEquipmentMaintenanceMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_FlightEquipmentMaintenanceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Flight Equipment Maintenance [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_FlightEquipmentMaintenanceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Flight Equipment Maintenance [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_AircraftTypeAxis" xlink:type="locator" xlink:label="srt_AircraftTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_AircraftTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aircraft Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_AircraftTypeAxis" xlink:to="srt_AircraftTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_AircraftTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Aircraft Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_AircraftTypeMember" xlink:type="locator" xlink:label="srt_AircraftTypeMember" />
    <link:label xml:lang="en-US" xlink:label="srt_AircraftTypeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aircraft</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_AircraftTypeMember" xlink:to="srt_AircraftTypeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_AircraftTypeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Aircraft Type [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CRJ900Member" xlink:type="locator" xlink:label="srt_CRJ900Member" />
    <link:label xml:lang="en-US" xlink:label="srt_CRJ900Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CRJ-900 [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CRJ900Member" xlink:to="srt_CRJ900Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_CRJ900Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">C R J900 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total long-term debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:type="locator" xlink:label="us-gaap_LongTermDebtCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less current portion</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:type="locator" xlink:label="us-gaap_LongTermDebtNoncurrent" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Noncurrent</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_DebtInstrumentMaturityYear" xlink:type="locator" xlink:label="mesa_DebtInstrumentMaturityYear" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_DebtInstrumentMaturityYear" xlink:to="mesa_DebtInstrumentMaturityYear_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableRateAxis" xlink:type="locator" xlink:label="us-gaap_VariableRateAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableRateDomain" xlink:type="locator" xlink:label="us-gaap_VariableRateDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_VariableRateDomain_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:type="locator" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:to="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">London Interbank Offered Rate L I B O R [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CRJ700Member" xlink:type="locator" xlink:label="srt_CRJ700Member" />
    <link:label xml:lang="en-US" xlink:label="srt_CRJ700Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CRJ-700</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CRJ700Member" xlink:to="srt_CRJ700Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_CRJ700Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">C R J700 [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_FiveCRJ700AndNineCRJ900Member" xlink:type="locator" xlink:label="mesa_FiveCRJ700AndNineCRJ900Member" />
    <link:label xml:lang="en-US" xlink:label="mesa_FiveCRJ700AndNineCRJ900Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Five C- R- J-700 and Nine C- R- J-900.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_FiveCRJ700AndNineCRJ900Member" xlink:to="mesa_FiveCRJ700AndNineCRJ900Member_lbl" />
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    <link:label xml:lang="en-US" xlink:label="mesa_FiveCRJ700AndNineCRJ900Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Five C R J700 And Nine C R J900 [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_ThreeCRJ900AndThreeCRJ700Member" xlink:type="locator" xlink:label="mesa_ThreeCRJ900AndThreeCRJ700Member" />
    <link:label xml:lang="en-US" xlink:label="mesa_ThreeCRJ900AndThreeCRJ700Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Three C- R- J-900 and Three C- R- J-700.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_ThreeCRJ900AndThreeCRJ700Member" xlink:to="mesa_ThreeCRJ900AndThreeCRJ700Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_ThreeCRJ900AndThreeCRJ700Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Three C- R- J-900 and Three C- R- J-700 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_ThreeCRJ900AndThreeCRJ700Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Three C R J900 And Three C R J700 [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_TenCRJ900AircraftMember" xlink:type="locator" xlink:label="mesa_TenCRJ900AircraftMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_TenCRJ900AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Ten CRJ-900 Aircraft.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_TenCRJ900AircraftMember" xlink:to="mesa_TenCRJ900AircraftMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_TenCRJ900AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ten C- R- J-900 Aircraft [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_TenCRJ900AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Ten C R J900 Aircraft [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_EightCRJ900AircraftMember" xlink:type="locator" xlink:label="mesa_EightCRJ900AircraftMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_EightCRJ900AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Eight C- R- J-900 Aircraft.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_EightCRJ900AircraftMember" xlink:to="mesa_EightCRJ900AircraftMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_EightCRJ900AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Eight C- R- J-900 Aircraft [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_EightCRJ900AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Eight C R J900 Aircraft [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_SeniorNotesDueTwoThousandTwentySevenMember" xlink:type="locator" xlink:label="mesa_SeniorNotesDueTwoThousandTwentySevenMember" />
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    <link:label xml:lang="en-US" xlink:label="mesa_SeniorNotesDueTwoThousandTwentySevenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior Notes Due Two Thousand Twenty Seven [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_SubordinatedNotesDueTwoThousandTwentySevenMember" xlink:type="locator" xlink:label="mesa_SubordinatedNotesDueTwoThousandTwentySevenMember" />
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    <link:label xml:lang="en-US" xlink:label="mesa_SubordinatedNotesDueTwoThousandTwentySevenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Notes Due Two Thousand Twenty Seven [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_TenE175AircraftMember" xlink:type="locator" xlink:label="mesa_TenE175AircraftMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_TenE175AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Ten E-175 Aircraft [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_TenE175AircraftMember" xlink:to="mesa_TenE175AircraftMember_lbl" />
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    <link:label xml:lang="en-US" xlink:label="mesa_TenE175AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Ten E175 Aircraft [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_EightE175AircraftMember" xlink:type="locator" xlink:label="mesa_EightE175AircraftMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_EightE175AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Eight E-175 Aircraft.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_EightE175AircraftMember" xlink:to="mesa_EightE175AircraftMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_EightE175AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Eight E-175 Aircraft [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_EightE175AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Eight E175 Aircraft [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_SeniorNotesDueTwoThousandTwentyEightMember" xlink:type="locator" xlink:label="mesa_SeniorNotesDueTwoThousandTwentyEightMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorNotesDueTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior notes due two thousand twenty eight.</link:label>
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    <link:label xml:lang="en-US" xlink:label="mesa_SeniorNotesDueTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior Notes Due 2008 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorNotesDueTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior Notes Due Two Thousand Twenty Eight [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_SubordinatedNotesDueTwoThousandTwentyEightMember" xlink:type="locator" xlink:label="mesa_SubordinatedNotesDueTwoThousandTwentyEightMember" />
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    <link:label xml:lang="en-US" xlink:label="mesa_SubordinatedNotesDueTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Notes Due Two Thousand Twenty Eight [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_SeniorNotesDueTwoThousandTwentyTwoMember" xlink:type="locator" xlink:label="mesa_SeniorNotesDueTwoThousandTwentyTwoMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorNotesDueTwoThousandTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior notes due two thousand twenty two.</link:label>
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    <link:label xml:lang="en-US" xlink:label="mesa_SeniorNotesDueTwoThousandTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior Notes due Two Thousand Twenty Two [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorNotesDueTwoThousandTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior Notes Due Two Thousand Twenty Two [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_SubordinatedNotesDuetwothousandtwentytwoMember" xlink:type="locator" xlink:label="mesa_SubordinatedNotesDuetwothousandtwentytwoMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_SubordinatedNotesDuetwothousandtwentytwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Subordinated notes due two thousand twenty two member.</link:label>
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    <link:label xml:lang="en-US" xlink:label="mesa_SubordinatedNotesDuetwothousandtwentytwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subordinated Notes DueTwoThousandTwentyTwo [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_SubordinatedNotesDuetwothousandtwentytwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Notes Duetwothousandtwentytwo [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeAxis" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Longterm Debt Type [Axis]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Longterm Debt Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeaseObligationsMember" xlink:type="locator" xlink:label="us-gaap_CapitalLeaseObligationsMember" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeaseObligationsMember" xlink:to="us-gaap_CapitalLeaseObligationsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalLeaseObligationsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Lease Obligations [Member]</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_SeniorNotesDueTwoThousandTwentyMember" xlink:to="mesa_SeniorNotesDueTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorNotesDueTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior Notes Due 2020 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_SeniorNotesDueTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior Notes Due Two Thousand Twenty [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_SubordinatedNotesDueTwoThousandTwentyMember" xlink:type="locator" xlink:label="mesa_SubordinatedNotesDueTwoThousandTwentyMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_SubordinatedNotesDueTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Subordinated notes due two thousand twenty.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_SubordinatedNotesDueTwoThousandTwentyMember" xlink:to="mesa_SubordinatedNotesDueTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_SubordinatedNotesDueTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subordinated Notes Due 2020 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_SubordinatedNotesDueTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Notes Due Two Thousand Twenty [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_DebtInstrumentMaturityYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument maturity year</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_DebtInstrumentMaturityYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Maturity Year</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NumberOfAircraftRefinanced" xlink:type="locator" xlink:label="mesa_NumberOfAircraftRefinanced" />
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftRefinanced_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of aircraft refinanced.</link:label>
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    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftRefinanced_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of aircraft refinanced</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftRefinanced_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Aircraft Refinanced</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentFaceAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, face amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFaceAmount" xlink:to="us-gaap_DebtInstrumentFaceAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Face Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long term debt interest rate description</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:to="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Description Of Variable Rate Basis</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long term debt basis spread on variable rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Basis Spread On Variable Rate1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtPercentageBearingVariableInterestRate" xlink:type="locator" xlink:label="us-gaap_LongTermDebtPercentageBearingVariableInterestRate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtPercentageBearingVariableInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long term debt interest rate percentage</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtPercentageBearingVariableInterestRate" xlink:to="us-gaap_LongTermDebtPercentageBearingVariableInterestRate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtPercentageBearingVariableInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Percentage Bearing Variable Interest Rate</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NumberOfAircraftFinanced" xlink:type="locator" xlink:label="mesa_NumberOfAircraftFinanced" />
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftFinanced_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of aircraft financed.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NumberOfAircraftFinanced" xlink:to="mesa_NumberOfAircraftFinanced_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftFinanced_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of aircraft financed</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftFinanced_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Aircraft Financed</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long term debt interest rate percentage</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Interest Rate Stated Percentage</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_DebtInstrumentImputedInterestRate" xlink:type="locator" xlink:label="mesa_DebtInstrumentImputedInterestRate" />
    <link:label xml:lang="en-US" xlink:label="mesa_DebtInstrumentImputedInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument imputed interest rate.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_DebtInstrumentImputedInterestRate" xlink:to="mesa_DebtInstrumentImputedInterestRate_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_DebtInstrumentImputedInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Imputed interest</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_DebtInstrumentImputedInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Imputed Interest Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt discount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentUnamortizedDiscount" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Unamortized Discount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding facility borrowings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Maximum Borrowing Capacity</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NumberOfSpareEnginesLeased" xlink:type="locator" xlink:label="mesa_NumberOfSpareEnginesLeased" />
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfSpareEnginesLeased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of spare engines leased.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NumberOfSpareEnginesLeased" xlink:to="mesa_NumberOfSpareEnginesLeased_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfSpareEnginesLeased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of spare engines leased</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfSpareEnginesLeased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Spare Engines Leased</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtByMaturityAbstract" xlink:type="locator" xlink:label="us-gaap_LongTermDebtByMaturityAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtByMaturityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt By Maturity [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtByMaturityAbstract" xlink:to="us-gaap_LongTermDebtByMaturityAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remainder of 2019</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2020</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal After Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AirTransportationEquipmentMember" xlink:type="locator" xlink:label="us-gaap_AirTransportationEquipmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AirTransportationEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aircraft and Equipment [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AirTransportationEquipmentMember" xlink:to="us-gaap_AirTransportationEquipmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AirTransportationEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Air Transportation Equipment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MajorPropertyClassAxis" xlink:type="locator" xlink:label="us-gaap_MajorPropertyClassAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MajorPropertyClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Major Property Class</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MajorPropertyClassAxis" xlink:to="us-gaap_MajorPropertyClassAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MajorPropertyClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Major Property Class [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MajorPropertyClassDomain" xlink:type="locator" xlink:label="us-gaap_MajorPropertyClassDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MajorPropertyClassDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Major Property Class</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MajorPropertyClassDomain" xlink:to="us-gaap_MajorPropertyClassDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MajorPropertyClassDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Major Property Class [Domain]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_PledgedAsCollateralMember" xlink:type="locator" xlink:label="mesa_PledgedAsCollateralMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_PledgedAsCollateralMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Pledged As Collateral [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_PledgedAsCollateralMember" xlink:to="mesa_PledgedAsCollateralMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_PledgedAsCollateralMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pledged as Collateral [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_PledgedAsCollateralMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pledged As Collateral [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_EquipmentNotesMember" xlink:type="locator" xlink:label="mesa_EquipmentNotesMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_EquipmentNotesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Equipment Notes [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_EquipmentNotesMember" xlink:to="mesa_EquipmentNotesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_EquipmentNotesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equipment Notes [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_EquipmentNotesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equipment Notes [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_TermLoanMember" xlink:type="locator" xlink:label="mesa_TermLoanMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_TermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_TermLoanMember" xlink:to="mesa_TermLoanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_TermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term Loan</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_TermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Term Loan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:type="locator" xlink:label="us-gaap_CreditFacilityAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:type="locator" xlink:label="us-gaap_CreditFacilityDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="us-gaap_CreditFacilityDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Domain]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_SpareEngineFacilityMember" xlink:type="locator" xlink:label="mesa_SpareEngineFacilityMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_SpareEngineFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Spare engine facility.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_SpareEngineFacilityMember" xlink:to="mesa_SpareEngineFacilityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_SpareEngineFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Spare Engine Facility [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_SpareEngineFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Spare Engine Facility [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Long-Term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermDebtRefinancedAmount" xlink:type="locator" xlink:label="us-gaap_ShortTermDebtRefinancedAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtRefinancedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Refinanced debt</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtRefinancedAmount" xlink:to="us-gaap_ShortTermDebtRefinancedAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtRefinancedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Debt Refinanced Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftFinanced_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of aircraft under refinanced debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfDebt" xlink:type="locator" xlink:label="us-gaap_ProceedsFromRepaymentsOfDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromRepaymentsOfDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net cash proceeds after transaction related fees</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromRepaymentsOfDebt" xlink:to="us-gaap_ProceedsFromRepaymentsOfDebt_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromRepaymentsOfDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Repayments Of Debt</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Long term debt, basis spread on variable rate</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NumberOfAircraftPurchased" xlink:type="locator" xlink:label="mesa_NumberOfAircraftPurchased" />
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftPurchased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of aircraft purchased.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NumberOfAircraftPurchased" xlink:to="mesa_NumberOfAircraftPurchased_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_GoodsAndServicesCredit" xlink:type="locator" xlink:label="mesa_GoodsAndServicesCredit" />
    <link:label xml:lang="en-US" xlink:label="mesa_GoodsAndServicesCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Goods and services credit.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_GoodsAndServicesCredit" xlink:to="mesa_GoodsAndServicesCredit_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftPurchased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of aircraft purchased</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfAircraftPurchased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Aircraft Purchased</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForFlightEquipment" xlink:type="locator" xlink:label="us-gaap_PaymentsForFlightEquipment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForFlightEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment for aircraft purchased</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForFlightEquipment" xlink:to="us-gaap_PaymentsForFlightEquipment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForFlightEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments For Flight Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossOnContractTermination" xlink:type="locator" xlink:label="us-gaap_LossOnContractTermination" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossOnContractTermination_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Non-cash lease termination expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossOnContractTermination" xlink:to="us-gaap_LossOnContractTermination_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossOnContractTermination_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss On Contract Termination</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_GoodsAndServicesCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Future goods and services credits</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_GoodsAndServicesCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goods And Services Credit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentDecreaseForgiveness" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentDecreaseForgiveness" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentDecreaseForgiveness_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loan forgiveness for loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentDecreaseForgiveness" xlink:to="us-gaap_DebtInstrumentDecreaseForgiveness_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentDecreaseForgiveness_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Decrease Forgiveness</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants to purchase shares of common stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:to="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfLinesOfCredit" xlink:type="locator" xlink:label="us-gaap_RepaymentsOfLinesOfCredit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RepaymentsOfLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CIT revolving credit facility outstanding</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfLinesOfCredit" xlink:to="us-gaap_RepaymentsOfLinesOfCredit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RepaymentsOfLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Repayments Of Lines Of Credit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentTerm" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentTerm" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term loan, term</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTerm" xlink:to="us-gaap_DebtInstrumentTerm_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WriteOffOfDeferredDebtIssuanceCost" xlink:type="locator" xlink:label="us-gaap_WriteOffOfDeferredDebtIssuanceCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_WriteOffOfDeferredDebtIssuanceCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Write-off of financing cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WriteOffOfDeferredDebtIssuanceCost" xlink:to="us-gaap_WriteOffOfDeferredDebtIssuanceCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_WriteOffOfDeferredDebtIssuanceCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Write Off Of Deferred Debt Issuance Cost</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsOfDebtExtinguishmentCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment for debt extinguishment prepayment penalties</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_EarningsPerShareAndEquityAbstract" xlink:type="locator" xlink:label="mesa_EarningsPerShareAndEquityAbstract" />
    <link:label xml:lang="en-US" xlink:label="mesa_EarningsPerShareAndEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Earnings per share and equity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_EarningsPerShareAndEquityAbstract" xlink:to="mesa_EarningsPerShareAndEquityAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_EarningsPerShareAndEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share And Equity [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Basic weighted average common shares outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract" xlink:type="locator" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Add: Incremental shares for:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract" xlink:to="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number Diluted Shares Outstanding Adjustment [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" xlink:type="locator" xlink:label="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dilutive effect of warrants</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" xlink:to="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Incremental Common Shares Attributable To Call Options And Warrants</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:type="locator" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dilutive effect of restricted stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:to="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Incremental Common Shares Attributable To Share Based Payment Arrangements</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Diluted weighted average common shares outstanding</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net income per common share attributable to Mesa Air Group:</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_EarningsPerShareLineItems" xlink:type="locator" xlink:label="mesa_EarningsPerShareLineItems" />
    <link:label xml:lang="en-US" xlink:label="mesa_EarningsPerShareLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Earnings Per Share [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_EarningsPerShareLineItems" xlink:to="mesa_EarningsPerShareLineItems_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_EarningsPerShareTable" xlink:type="locator" xlink:label="mesa_EarningsPerShareTable" />
    <link:label xml:lang="en-US" xlink:label="mesa_EarningsPerShareTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Earnings Per Share [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_EarningsPerShareTable" xlink:to="mesa_EarningsPerShareTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_EarningsPerShareTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Earnings Per Share [Table]</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StateAndLocalJurisdictionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">State and Local Jurisdiction [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StateAndLocalJurisdictionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">State And Local Jurisdiction [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_TaxPeriodAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tax Period [Axis]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_TaxPeriodDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax Period</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAggregateDisclosuresAbstract" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAggregateDisclosuresAbstract" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DirectorMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Director [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized compensation cost related to unvested share-based compensation arrangements</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized compensation cost, period for recognition</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:type="locator" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allocated Share Based Compensation Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:type="locator" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchased shares, shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRepurchasedDuringPeriodShares" xlink:to="us-gaap_StockRepurchasedDuringPeriodShares_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchased During Period Shares</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Repurchased shares, value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award vesting period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_NumberOfLeasedAircraft" xlink:type="locator" xlink:label="mesa_NumberOfLeasedAircraft" />
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfLeasedAircraft_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of leased aircraft.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_NumberOfLeasedAircraft" xlink:to="mesa_NumberOfLeasedAircraft_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfOperatingLeasedAssetsTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfOperatingLeasedAssetsTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfOperatingLeasedAssetsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Operating Leased Assets [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfOperatingLeasedAssetsTable" xlink:to="us-gaap_ScheduleOfOperatingLeasedAssetsTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfOperatingLeasedAssetsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Operating Leased Assets [Table]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_AircraftMember" xlink:type="locator" xlink:label="mesa_AircraftMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Aircraft.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_AircraftMember" xlink:to="mesa_AircraftMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aircraft [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_AircraftMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Aircraft [Member]</link:label>
    <link:loc xlink:href="mesa-20190331.xsd#mesa_HeadquartersAndOtherFacilityMember" xlink:type="locator" xlink:label="mesa_HeadquartersAndOtherFacilityMember" />
    <link:label xml:lang="en-US" xlink:label="mesa_HeadquartersAndOtherFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Headquarters and other facility.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_HeadquartersAndOtherFacilityMember" xlink:to="mesa_HeadquartersAndOtherFacilityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_HeadquartersAndOtherFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Headquarters and other facility [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_HeadquartersAndOtherFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Headquarters And Other Facility [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasedAssetsLineItems" xlink:type="locator" xlink:label="us-gaap_OperatingLeasedAssetsLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasedAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Leased Assets [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasedAssetsLineItems" xlink:to="us-gaap_OperatingLeasedAssetsLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasedAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leased Assets [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfLeasedAircraft_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of leased aircraft</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_NumberOfLeasedAircraft_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Leased Aircraft</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseTermOfContract" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases remaining term</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseTermOfContract" xlink:to="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Term Of Contract</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesRentExpenseNet" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesRentExpenseNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesRentExpenseNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate rental expense under all operating aircraft, equipment and facility leases</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesRentExpenseNet" xlink:to="us-gaap_OperatingLeasesRentExpenseNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesRentExpenseNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Rent Expense Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_lbl" />
    <link:loc xlink:href="mesa-20190331.xsd#mesa_Other1Member" xlink:type="locator" xlink:label="mesa_Other1Member" />
    <link:label xml:lang="en-US" xlink:label="mesa_Other1Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other 1.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mesa_Other1Member" xlink:to="mesa_Other1Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="mesa_Other1Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="mesa_Other1Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other1 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remainder of 2019</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Remainder Of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2020</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due In Two Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due In Three Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due In Four Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due In Five Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due Thereafter</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash, cash equivalents, and restricted cash in Condensed Consolidated Statement of Cash Flows</link:label>
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