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    <link:label id="lab_us-gaap_OtherAssetsNoncurrentAbstract_7A8B65143C9D2C8241A3D0340D4BDFD5_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrentAbstract_7A8B65143C9D2C8241A3D0340D4BDFD5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other assets:</link:label>
    <link:label id="lab_us-gaap_OtherAssetsNoncurrentAbstract_7A8B65143C9D2C8241A3D0340D4BDFD5_label_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrentAbstract_7A8B65143C9D2C8241A3D0340D4BDFD5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets, Noncurrent [Abstract]</link:label>
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    <link:label id="lab_us-gaap_Goodwill_0A1467110F21479E0979D0340D4B4700_terseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_0A1467110F21479E0979D0340D4B4700" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_Goodwill_0A1467110F21479E0979D0340D4B4700_label_en-US" xlink:label="lab_us-gaap_Goodwill_0A1467110F21479E0979D0340D4B4700" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_0A1467110F21479E0979D0340D4B4700" xlink:to="lab_us-gaap_Goodwill_0A1467110F21479E0979D0340D4B4700" xlink:type="arc" />
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    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_0611B847C3D8C6D7D034D0340D4CBC16_label_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_0611B847C3D8C6D7D034D0340D4CBC16" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intangible Assets, Net (Excluding Goodwill)</link:label>
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    <link:label id="lab_us-gaap_NotesAndLoansReceivableNetNoncurrent_E28E2D1DF803179D103BD0340D4C8585_terseLabel_en-US" xlink:label="lab_us-gaap_NotesAndLoansReceivableNetNoncurrent_E28E2D1DF803179D103BD0340D4C8585" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Notes receivable, net</link:label>
    <link:label id="lab_us-gaap_NotesAndLoansReceivableNetNoncurrent_E28E2D1DF803179D103BD0340D4C8585_label_en-US" xlink:label="lab_us-gaap_NotesAndLoansReceivableNetNoncurrent_E28E2D1DF803179D103BD0340D4C8585" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, after Allowance for Credit Loss, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NotesAndLoansReceivableNetNoncurrent" xlink:label="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_E28E2D1DF803179D103BD0340D4C8585" xlink:type="locator" />
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    <link:label id="lab_us-gaap_InvestmentsAndOtherNoncurrentAssets_DA85808E84FCDC9ABE68D0340D4C58C0_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsAndOtherNoncurrentAssets_DA85808E84FCDC9ABE68D0340D4C58C0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments in affiliates and other, net</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentsAndOtherNoncurrentAssets" xlink:label="loc_us-gaap_InvestmentsAndOtherNoncurrentAssets_DA85808E84FCDC9ABE68D0340D4C58C0" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_765F4ECE00CF02759BB8D0340D4C6F52_totalLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_765F4ECE00CF02759BB8D0340D4C6F52" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total other assets</link:label>
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_765F4ECE00CF02759BB8D0340D4C6F52_label_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_765F4ECE00CF02759BB8D0340D4C6F52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_765F4ECE00CF02759BB8D0340D4C6F52" xlink:type="locator" />
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    <link:label id="lab_us-gaap_Assets_3C62946B61A939FE65E9D0340D4DDD54_label_en-US" xlink:label="lab_us-gaap_Assets_3C62946B61A939FE65E9D0340D4DDD54" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_3C62946B61A939FE65E9D0340D4DDD54" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_5CBA82E1A5C630C99AF1D0340D4D0FCF_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_5CBA82E1A5C630C99AF1D0340D4D0FCF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LIABILITIES AND STOCKHOLDERS' EQUITY</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_5CBA82E1A5C630C99AF1D0340D4D0FCF_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_5CBA82E1A5C630C99AF1D0340D4D0FCF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_5CBA82E1A5C630C99AF1D0340D4D0FCF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_802B438E8F112E0BD135D0340D4DE9CF_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_802B438E8F112E0BD135D0340D4DE9CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current liabilities:</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_802B438E8F112E0BD135D0340D4DE9CF_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_802B438E8F112E0BD135D0340D4DE9CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_802B438E8F112E0BD135D0340D4DE9CF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityCurrent_673BF7A7F894E2F2B4F5D0340D4D3B5A_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCurrent_673BF7A7F894E2F2B4F5D0340D4D3B5A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred revenue</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityCurrent_673BF7A7F894E2F2B4F5D0340D4D3B5A_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCurrent_673BF7A7F894E2F2B4F5D0340D4D3B5A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability, Current</link:label>
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    <link:label id="lab_us-gaap_AccountsPayableCurrent_9AAF923A2C0827B9CB68D0340D4E1B2B_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent_9AAF923A2C0827B9CB68D0340D4E1B2B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable</link:label>
    <link:label id="lab_us-gaap_AccountsPayableCurrent_9AAF923A2C0827B9CB68D0340D4E1B2B_label_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent_9AAF923A2C0827B9CB68D0340D4E1B2B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Payable, Current</link:label>
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    <link:label id="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_99A25AEC71D4BEDE8D55D0340D4EEE9C_label_en-US" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_99A25AEC71D4BEDE8D55D0340D4EEE9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee-related Liabilities, Current</link:label>
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    <link:label id="lab_us-gaap_LongTermDebtCurrent_3081541FA09813B7F9B3D0340D4EBE3D_label_en-US" xlink:label="lab_us-gaap_LongTermDebtCurrent_3081541FA09813B7F9B3D0340D4EBE3D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Current Maturities</link:label>
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    <link:label id="lab_us-gaap_FinanceLeaseLiabilityCurrent_6D5927FF7A5DC5537ADAD0340D4E132A_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityCurrent_6D5927FF7A5DC5537ADAD0340D4E132A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finance Lease, Liability, Current</link:label>
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    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_444DFD967902D94133CEB1A878EA9B49_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_444DFD967902D94133CEB1A878EA9B49" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other, net</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_444DFD967902D94133CEB1A878EA9B49_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_444DFD967902D94133CEB1A878EA9B49" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Other Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_444DFD967902D94133CEB1A878EA9B49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_444DFD967902D94133CEB1A878EA9B49" xlink:to="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_444DFD967902D94133CEB1A878EA9B49" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_C45AFD9002C8DEB5872DB1A878EA5931_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_C45AFD9002C8DEB5872DB1A878EA5931" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_C45AFD9002C8DEB5872DB1A878EA5931_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_C45AFD9002C8DEB5872DB1A878EA5931" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_C45AFD9002C8DEB5872DB1A878EA5931" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_9687219DC7973F68AB65B1A878EB795C_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_9687219DC7973F68AB65B1A878EB795C" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Payments of long-term debt</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_9687219DC7973F68AB65B1A878EB795C_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_9687219DC7973F68AB65B1A878EB795C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Long-term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_9687219DC7973F68AB65B1A878EB795C" xlink:type="locator" />
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    <link:label id="lab_ual_PaymentsOfDividendsToParentCompany_2AE81137F30328E4AEC6B1A878EBF792_negatedLabel_en-US" xlink:label="lab_ual_PaymentsOfDividendsToParentCompany_2AE81137F30328E4AEC6B1A878EBF792" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Dividend to UAL</link:label>
    <link:label id="lab_ual_PaymentsOfDividendsToParentCompany_2AE81137F30328E4AEC6B1A878EBF792_label_en-US" xlink:label="lab_ual_PaymentsOfDividendsToParentCompany_2AE81137F30328E4AEC6B1A878EBF792" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments Of Dividends To Parent Company</link:label>
    <link:label id="lab_ual_PaymentsOfDividendsToParentCompany_2AE81137F30328E4AEC6B1A878EBF792_documentation_en-US" xlink:label="lab_ual_PaymentsOfDividendsToParentCompany_2AE81137F30328E4AEC6B1A878EBF792" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payments of dividends to parent company.</link:label>
    <link:loc xlink:href="ual-20190930.xsd#ual_PaymentsOfDividendsToParentCompany" xlink:label="loc_ual_PaymentsOfDividendsToParentCompany_2AE81137F30328E4AEC6B1A878EBF792" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_92EBC56C0ECDDE13A017B1A878EC0E19_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_92EBC56C0ECDDE13A017B1A878EC0E19" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Repurchases of common stock</link:label>
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_92EBC56C0ECDDE13A017B1A878EC0E19_label_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_92EBC56C0ECDDE13A017B1A878EC0E19" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for Repurchase of Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_92EBC56C0ECDDE13A017B1A878EC0E19" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_B6AD5AB46D676B4660D3B1A878EC658A_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts_B6AD5AB46D676B4660D3B1A878EC658A" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Capitalized financing costs</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_B6AD5AB46D676B4660D3B1A878EC658A_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts_B6AD5AB46D676B4660D3B1A878EC658A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Debt Issuance Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_B6AD5AB46D676B4660D3B1A878EC658A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_8A7678DD6EE3510119F1B1A878EC567A_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_8A7678DD6EE3510119F1B1A878EC567A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other, net</link:label>
    <link:label id="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_8A7678DD6EE3510119F1B1A878EC567A_label_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_8A7678DD6EE3510119F1B1A878EC567A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from (Payments for) Other Financing Activities</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_25A5BB12DFE198730429B1A878ED6B58_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_25A5BB12DFE198730429B1A878ED6B58" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_25A5BB12DFE198730429B1A878ED6B58_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_25A5BB12DFE198730429B1A878ED6B58" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_25A5BB12DFE198730429B1A878ED6B58" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_25A5BB12DFE198730429B1A878ED6B58" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_25A5BB12DFE198730429B1A878ED6B58" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_B689A6E7908B670DF2B8B1A878ED8C86_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_B689A6E7908B670DF2B8B1A878ED8C86" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net increase in cash, cash equivalents and restricted cash</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_B689A6E7908B670DF2B8B1A878ED8C86_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_B689A6E7908B670DF2B8B1A878ED8C86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_B689A6E7908B670DF2B8B1A878ED8C86" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_957C85714B0690264302B1A878ED33CC_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_957C85714B0690264302B1A878ED33CC" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Cash, cash equivalents and restricted cash at beginning of the period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_957C85714B0690264302B1A878ED33CC" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_2CAC15A133FAFE1D5C52B1A878EF7AE7_terseLabel_en-US" xlink:label="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_2CAC15A133FAFE1D5C52B1A878EF7AE7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investing and Financing Activities Not Affecting Cash:</link:label>
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    <link:label id="lab_us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1_E9037E0303C5784A759FB1A878F0D31C_terseLabel_en-US" xlink:label="lab_us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1_E9037E0303C5784A759FB1A878F0D31C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property and equipment acquired through the issuance of debt</link:label>
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    <link:label id="lab_ual_FinanceLeaseConversionFromOperatingLeaseRecordedPropertyPlantAndEquipment_12F5D2BF8DE5E975C784B1A878F0A915_terseLabel_en-US" xlink:label="lab_ual_FinanceLeaseConversionFromOperatingLeaseRecordedPropertyPlantAndEquipment_12F5D2BF8DE5E975C784B1A878F0A915" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating lease conversions to finance lease</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_4E832F35F2D022A21631B1A873E37DC5_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_4E832F35F2D022A21631B1A873E37DC5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Last three months of 2019</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_6DF9CED3BE2DC5D50E0CB1A873E3C303_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_6DF9CED3BE2DC5D50E0CB1A873E3C303" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_ED17BEE5BEBDDAEEA45CB1A873E4F263_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_ED17BEE5BEBDDAEEA45CB1A873E4F263" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_4B29B8EDAFBC8A0B1078B1A873E6A35D_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_4B29B8EDAFBC8A0B1078B1A873E6A35D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_4B29B8EDAFBC8A0B1078B1A873E6A35D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_4B29B8EDAFBC8A0B1078B1A873E6A35D" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_4B29B8EDAFBC8A0B1078B1A873E6A35D" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_84E3DC31F1E3367D2131B1A873E6562C_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_84E3DC31F1E3367D2131B1A873E6562C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_84E3DC31F1E3367D2131B1A873E6562C_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_84E3DC31F1E3367D2131B1A873E6562C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Five</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_6AC182F2E061D041C528B1A873E77BAC_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_6AC182F2E061D041C528B1A873E77BAC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">After 2023</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_7DC7C9C47B0E184B3E0BB1A873E7DB79_totalLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_7DC7C9C47B0E184B3E0BB1A873E7DB79" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Minimum lease payments</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_7DC7C9C47B0E184B3E0BB1A873E7DB79_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_7DC7C9C47B0E184B3E0BB1A873E7DB79" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due</link:label>
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    <link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_EDEEE4AA8579477560F3B1A873EA7AD2_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_EDEEE4AA8579477560F3B1A873EA7AD2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_EDEEE4AA8579477560F3B1A873EA7AD2" xlink:type="locator" />
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    <link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_19766DE1F7E1CB688A1EB1A873EAC2B2_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_19766DE1F7E1CB688A1EB1A873EAC2B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_19766DE1F7E1CB688A1EB1A873EAC2B2_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_19766DE1F7E1CB688A1EB1A873EAC2B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finance Lease, Liability, Payments, Due Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_19766DE1F7E1CB688A1EB1A873EAC2B2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_19766DE1F7E1CB688A1EB1A873EAC2B2" xlink:to="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_19766DE1F7E1CB688A1EB1A873EAC2B2" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_335EBD3193B16DE9C1DDB1A873EA2FE4_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_335EBD3193B16DE9C1DDB1A873EA2FE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_335EBD3193B16DE9C1DDB1A873EA2FE4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_335EBD3193B16DE9C1DDB1A873EA2FE4" xlink:to="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_335EBD3193B16DE9C1DDB1A873EA2FE4" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_4EB3177DFFA8E6DA94A4B1A873EA669E_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_4EB3177DFFA8E6DA94A4B1A873EA669E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_4EB3177DFFA8E6DA94A4B1A873EA669E" xlink:to="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_4EB3177DFFA8E6DA94A4B1A873EA669E" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_C07FB658B3FAB4F82B4FB1A873EBCCB8_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_C07FB658B3FAB4F82B4FB1A873EBCCB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">After 2023</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_1D120F24C07DD00F0E7FB1A873EBF567" xlink:type="locator" />
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    <link:label id="lab_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_A642674759A827A677B3B1A873EC1F01_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_A642674759A827A677B3B1A873EC1F01" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Imputed interest</link:label>
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    <link:label id="lab_us-gaap_FinanceLeaseLiability_9AE932F4D2316DA7086DB1A873EC6C5D_totalLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiability_9AE932F4D2316DA7086DB1A873EC6C5D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Present value of minimum lease payments</link:label>
    <link:label id="lab_us-gaap_FinanceLeaseLiability_9AE932F4D2316DA7086DB1A873EC6C5D_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiability_9AE932F4D2316DA7086DB1A873EC6C5D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finance Lease, Liability</link:label>
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    <link:label id="lab_us-gaap_FinanceLeaseLiabilityCurrent_2275860190DD44999775B1A873ECDA5B_negatedLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityCurrent_2275860190DD44999775B1A873ECDA5B" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Less: current maturities of lease obligations</link:label>
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    <link:label id="lab_us-gaap_FinanceLeaseLiabilityNoncurrent_EBA4E726FDAEDA3A8204B1A873EC78EE_verboseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityNoncurrent_EBA4E726FDAEDA3A8204B1A873EC78EE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Long-term lease obligations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_EBA4E726FDAEDA3A8204B1A873EC78EE" xlink:type="locator" />
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    <link:label id="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_5F00CBB26099BF7DD40B969E18FA55E0_terseLabel_en-US" xlink:label="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_5F00CBB26099BF7DD40B969E18FA55E0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Last three months of 2019</link:label>
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    <link:label id="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_2B86A2FCF9CCDE273348969E18FA2999_terseLabel_en-US" xlink:label="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_2B86A2FCF9CCDE273348969E18FA2999" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
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    <link:label id="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_7EFE9FAE30D4371DCFF5969E18FAAF1C_terseLabel_en-US" xlink:label="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_7EFE9FAE30D4371DCFF5969E18FAAF1C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_7EFE9FAE30D4371DCFF5969E18FAAF1C_label_en-US" xlink:label="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_7EFE9FAE30D4371DCFF5969E18FAAF1C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrecorded Unconditional Purchase Obligation, Due within Three Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_7EFE9FAE30D4371DCFF5969E18FAAF1C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_7EFE9FAE30D4371DCFF5969E18FAAF1C" xlink:to="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_7EFE9FAE30D4371DCFF5969E18FAAF1C" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_004C1F5D441E792FC17E969E18FA65C6_terseLabel_en-US" xlink:label="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_004C1F5D441E792FC17E969E18FA65C6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_004C1F5D441E792FC17E969E18FA65C6_label_en-US" xlink:label="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_004C1F5D441E792FC17E969E18FA65C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrecorded Unconditional Purchase Obligation, Due within Four Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_004C1F5D441E792FC17E969E18FA65C6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_004C1F5D441E792FC17E969E18FA65C6" xlink:to="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_004C1F5D441E792FC17E969E18FA65C6" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_13130A055F62413721D6969E18FAA0EE_terseLabel_en-US" xlink:label="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_13130A055F62413721D6969E18FAA0EE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_13130A055F62413721D6969E18FAA0EE_label_en-US" xlink:label="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_13130A055F62413721D6969E18FAA0EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrecorded Unconditional Purchase Obligation, Due within Five Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_13130A055F62413721D6969E18FAA0EE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_13130A055F62413721D6969E18FAA0EE" xlink:to="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_13130A055F62413721D6969E18FAA0EE" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_75AC3CC776FF76AC2520969E18FA33BF_terseLabel_en-US" xlink:label="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_75AC3CC776FF76AC2520969E18FA33BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">After 2023</link:label>
    <link:label id="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_75AC3CC776FF76AC2520969E18FA33BF_label_en-US" xlink:label="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_75AC3CC776FF76AC2520969E18FA33BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrecorded Unconditional Purchase Obligation, Due after Five Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_75AC3CC776FF76AC2520969E18FA33BF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_75AC3CC776FF76AC2520969E18FA33BF" xlink:to="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_75AC3CC776FF76AC2520969E18FA33BF" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_D5956955ADD090614286969E18FBF19E_totalLabel_en-US" xlink:label="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_D5956955ADD090614286969E18FBF19E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total commitments</link:label>
    <link:label id="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_D5956955ADD090614286969E18FBF19E_label_en-US" xlink:label="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_D5956955ADD090614286969E18FBF19E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrecorded Unconditional Purchase Obligation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_D5956955ADD090614286969E18FBF19E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_D5956955ADD090614286969E18FBF19E" xlink:to="lab_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_D5956955ADD090614286969E18FBF19E" xlink:type="arc" />
    <link:label id="lab_ual_NumberOfAircraftsExpectedToTakeDeliveryYearTwo_E458677F3D530D7A8C5C969E18FBB29C_terseLabel_en-US" xlink:label="lab_ual_NumberOfAircraftsExpectedToTakeDeliveryYearTwo_E458677F3D530D7A8C5C969E18FBB29C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of aircrafts expected to be delivered in 2020</link:label>
    <link:loc xlink:href="ual-20190930.xsd#ual_NumberOfAircraftsExpectedToTakeDeliveryYearTwo" xlink:label="loc_ual_NumberOfAircraftsExpectedToTakeDeliveryYearTwo_E458677F3D530D7A8C5C969E18FBB29C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ual_NumberOfAircraftsExpectedToTakeDeliveryYearTwo_E458677F3D530D7A8C5C969E18FBB29C" xlink:to="lab_ual_NumberOfAircraftsExpectedToTakeDeliveryYearTwo_E458677F3D530D7A8C5C969E18FBB29C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_13A1CC832BC2969C2E36969E18F37FA4_terseLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_13A1CC832BC2969C2E36969E18F37FA4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Last three months of 2019</link:label>
    <link:label id="lab_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_13A1CC832BC2969C2E36969E18F37FA4_label_en-US" xlink:label="lab_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_13A1CC832BC2969C2E36969E18F37FA4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation, Future Minimum Payments Due, Remainder of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear" xlink:label="loc_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_13A1CC832BC2969C2E36969E18F37FA4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_13A1CC832BC2969C2E36969E18F37FA4" xlink:to="lab_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_13A1CC832BC2969C2E36969E18F37FA4" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligationDueInSecondYear_BEC5B8CE1FA7C93119D9969E18F32BFA_terseLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInSecondYear_BEC5B8CE1FA7C93119D9969E18F32BFA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
    <link:label id="lab_us-gaap_ContractualObligationDueInSecondYear_BEC5B8CE1FA7C93119D9969E18F32BFA_label_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInSecondYear_BEC5B8CE1FA7C93119D9969E18F32BFA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation, Due in Second Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractualObligationDueInSecondYear" xlink:label="loc_us-gaap_ContractualObligationDueInSecondYear_BEC5B8CE1FA7C93119D9969E18F32BFA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligationDueInSecondYear_BEC5B8CE1FA7C93119D9969E18F32BFA" xlink:to="lab_us-gaap_ContractualObligationDueInSecondYear_BEC5B8CE1FA7C93119D9969E18F32BFA" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligationDueInThirdYear_21509E09FA0E42AECA89969E18F3A5F5_terseLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInThirdYear_21509E09FA0E42AECA89969E18F3A5F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_ContractualObligationDueInThirdYear_21509E09FA0E42AECA89969E18F3A5F5_label_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInThirdYear_21509E09FA0E42AECA89969E18F3A5F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation, Due in Third Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractualObligationDueInThirdYear" xlink:label="loc_us-gaap_ContractualObligationDueInThirdYear_21509E09FA0E42AECA89969E18F3A5F5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligationDueInThirdYear_21509E09FA0E42AECA89969E18F3A5F5" xlink:to="lab_us-gaap_ContractualObligationDueInThirdYear_21509E09FA0E42AECA89969E18F3A5F5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligationDueInFourthYear_93539350B1FA133429D9969E18F33B3E_terseLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInFourthYear_93539350B1FA133429D9969E18F33B3E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_ContractualObligationDueInFourthYear_93539350B1FA133429D9969E18F33B3E_label_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInFourthYear_93539350B1FA133429D9969E18F33B3E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation, Due in Fourth Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractualObligationDueInFourthYear" xlink:label="loc_us-gaap_ContractualObligationDueInFourthYear_93539350B1FA133429D9969E18F33B3E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligationDueInFourthYear_93539350B1FA133429D9969E18F33B3E" xlink:to="lab_us-gaap_ContractualObligationDueInFourthYear_93539350B1FA133429D9969E18F33B3E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligationDueInFifthYear_C1F4C3F3920B30D96341969E18F41FB4_terseLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInFifthYear_C1F4C3F3920B30D96341969E18F41FB4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_ContractualObligationDueInFifthYear_C1F4C3F3920B30D96341969E18F41FB4_label_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInFifthYear_C1F4C3F3920B30D96341969E18F41FB4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation, Due in Fifth Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractualObligationDueInFifthYear" xlink:label="loc_us-gaap_ContractualObligationDueInFifthYear_C1F4C3F3920B30D96341969E18F41FB4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligationDueInFifthYear_C1F4C3F3920B30D96341969E18F41FB4" xlink:to="lab_us-gaap_ContractualObligationDueInFifthYear_C1F4C3F3920B30D96341969E18F41FB4" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligationDueAfterFifthYear_A384D0A5E8EB5140ABED969E18F472D6_terseLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationDueAfterFifthYear_A384D0A5E8EB5140ABED969E18F472D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">After 2023</link:label>
    <link:label id="lab_us-gaap_ContractualObligationDueAfterFifthYear_A384D0A5E8EB5140ABED969E18F472D6_label_en-US" xlink:label="lab_us-gaap_ContractualObligationDueAfterFifthYear_A384D0A5E8EB5140ABED969E18F472D6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation, Due after Fifth Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractualObligationDueAfterFifthYear" xlink:label="loc_us-gaap_ContractualObligationDueAfterFifthYear_A384D0A5E8EB5140ABED969E18F472D6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligationDueAfterFifthYear_A384D0A5E8EB5140ABED969E18F472D6" xlink:to="lab_us-gaap_ContractualObligationDueAfterFifthYear_A384D0A5E8EB5140ABED969E18F472D6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligation_D58AA6DAFC71A3DF617E969E18F43C79_totalLabel_en-US" xlink:label="lab_us-gaap_ContractualObligation_D58AA6DAFC71A3DF617E969E18F43C79" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractualObligation" xlink:label="loc_us-gaap_ContractualObligation_D58AA6DAFC71A3DF617E969E18F43C79" xlink:type="locator" />
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    <link:label id="lab_us-gaap_EmployeeRelatedLiabilitiesCurrentAndNoncurrentAbstract_FE081F2A44835960E3BDE3050C61F5C1_label_en-US" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrentAndNoncurrentAbstract_F46441028EDA5BDA98C9AC63306C48F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee-related Liabilities [Abstract]</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_9657C737CD1EC245E56CE3050C61F122_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_1B279D1BA11552F08665061A538CB6F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Components of Net Periodic Benefit Cost</link:label>
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