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    <link:label id="lab_dk_Totalnonoperatingincomeexpenses_F4FA4B369C42F23B7D1E79964C80FE02_totalLabel_en-US" xlink:label="lab_dk_Totalnonoperatingincomeexpenses_F4FA4B369C42F23B7D1E79964C80FE02" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total non-operating expenses, net</link:label>
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    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_7FDFDBFE2FA795C79F6579964C809D9D_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_7FDFDBFE2FA795C79F6579964C809D9D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Income before income tax expense</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_1C3840EABF25460EBC9779964C809236_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_1C3840EABF25460EBC9779964C809236" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_1C3840EABF25460EBC9779964C809236" xlink:type="locator" />
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    <link:label id="lab_dk_NetIncomeLossAttributableToPartners_132E71EE34B8CDDCB40879964C815526_totalLabel_en-US" xlink:label="lab_dk_NetIncomeLossAttributableToPartners_132E71EE34B8CDDCB40879964C815526" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net income attributable to partners</link:label>
    <link:label id="lab_dk_NetIncomeLossAttributableToPartners_132E71EE34B8CDDCB40879964C815526_label_en-US" xlink:label="lab_dk_NetIncomeLossAttributableToPartners_132E71EE34B8CDDCB40879964C815526" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Attributable To Partners</link:label>
    <link:label id="lab_dk_NetIncomeLossAttributableToPartners_132E71EE34B8CDDCB40879964C815526_documentation_en-US" xlink:label="lab_dk_NetIncomeLossAttributableToPartners_132E71EE34B8CDDCB40879964C815526" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Aggregate amount of net income attributable to the partners, which excludes the amount of net income attributable to predecessor entities.</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_NetIncomeLossAttributableToPartners" xlink:label="loc_dk_NetIncomeLossAttributableToPartners_132E71EE34B8CDDCB40879964C815526" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_NetIncomeLossAttributableToPartners_132E71EE34B8CDDCB40879964C815526" xlink:to="lab_dk_NetIncomeLossAttributableToPartners_132E71EE34B8CDDCB40879964C815526" xlink:type="arc" />
    <link:label id="lab_dk_Comprehensiveincomeattributabletopartners_80BE4D0DC143F355FF7479964C81B752_totalLabel_en-US" xlink:label="lab_dk_Comprehensiveincomeattributabletopartners_80BE4D0DC143F355FF7479964C81B752" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Comprehensive income attributable to partners</link:label>
    <link:label id="lab_dk_Comprehensiveincomeattributabletopartners_80BE4D0DC143F355FF7479964C81B752_label_en-US" xlink:label="lab_dk_Comprehensiveincomeattributabletopartners_80BE4D0DC143F355FF7479964C81B752" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive income attributable to partners</link:label>
    <link:label id="lab_dk_Comprehensiveincomeattributabletopartners_80BE4D0DC143F355FF7479964C81B752_documentation_en-US" xlink:label="lab_dk_Comprehensiveincomeattributabletopartners_80BE4D0DC143F355FF7479964C81B752" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Comprehensive income attributable to partners</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_Comprehensiveincomeattributabletopartners" xlink:label="loc_dk_Comprehensiveincomeattributabletopartners_80BE4D0DC143F355FF7479964C81B752" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetIncomeLossAllocatedToGeneralPartners_E555DF84D4C0668B419079964C81A01A_verboseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAllocatedToGeneralPartners_E555DF84D4C0668B419079964C81A01A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Less: General partner's interest in net income, including incentive distribution rights</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAllocatedToGeneralPartners_E555DF84D4C0668B419079964C81A01A_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAllocatedToGeneralPartners_E555DF84D4C0668B419079964C81A01A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Allocated to General Partners</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLossAllocatedToGeneralPartners" xlink:label="loc_us-gaap_NetIncomeLossAllocatedToGeneralPartners_E555DF84D4C0668B419079964C81A01A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetIncomeLossAllocatedToLimitedPartners_FC86EA9C76C2E1CFED9979964C8290A0_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAllocatedToLimitedPartners_FC86EA9C76C2E1CFED9979964C8290A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Limited partners' interest in net income</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAllocatedToLimitedPartners_FC86EA9C76C2E1CFED9979964C8290A0_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAllocatedToLimitedPartners_FC86EA9C76C2E1CFED9979964C8290A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Allocated to Limited Partners</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLossAllocatedToLimitedPartners" xlink:label="loc_us-gaap_NetIncomeLossAllocatedToLimitedPartners_FC86EA9C76C2E1CFED9979964C8290A0" xlink:type="locator" />
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    <link:label id="lab_dk_NetIncomePerLimitedPartnerUnitAbstract_A88098E95938B3A7FB4079964C82A94D_terseLabel_en-US" xlink:label="lab_dk_NetIncomePerLimitedPartnerUnitAbstract_A88098E95938B3A7FB4079964C82A94D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income per limited partner unit:</link:label>
    <link:label id="lab_dk_NetIncomePerLimitedPartnerUnitAbstract_A88098E95938B3A7FB4079964C82A94D_label_en-US" xlink:label="lab_dk_NetIncomePerLimitedPartnerUnitAbstract_A88098E95938B3A7FB4079964C82A94D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net income per limited partner unit: [Abstract]</link:label>
    <link:label id="lab_dk_NetIncomePerLimitedPartnerUnitAbstract_A88098E95938B3A7FB4079964C82A94D_documentation_en-US" xlink:label="lab_dk_NetIncomePerLimitedPartnerUnitAbstract_A88098E95938B3A7FB4079964C82A94D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net income per limited partner unit: [Abstract]</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_NetIncomePerLimitedPartnerUnitAbstract" xlink:label="loc_dk_NetIncomePerLimitedPartnerUnitAbstract_A88098E95938B3A7FB4079964C82A94D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax_5922511397FC783ABDA579964C829892_verboseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax_5922511397FC783ABDA579964C829892" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Common units - (basic) (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax_5922511397FC783ABDA579964C829892_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax_5922511397FC783ABDA579964C829892" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Net of Tax</link:label>
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    <link:label id="lab_us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted_53FEA45B4FC190DA1A4679964C823514_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted_53FEA45B4FC190DA1A4679964C823514" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss), Net of Tax, Per Outstanding Limited Partnership Unit, Diluted</link:label>
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    <link:label id="lab_dk_WeightedAverageLimitedPartnerUnitsOutstandingAbstract_9ADAAA72E55D4F1E7D7579964C83452F_documentation_en-US" xlink:label="lab_dk_WeightedAverageLimitedPartnerUnitsOutstandingAbstract_9ADAAA72E55D4F1E7D7579964C83452F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Weighted average limited partner units outstanding: [Abstract]</link:label>
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    <link:label id="lab_dk_CommonPublicMember_EBDD90D08E8ED7B1B74B47CB8D49FD22_label_en-US" xlink:label="lab_dk_CommonPublicMember_87827C7AE5EF517C8D8A9BC0BEC74FEF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common- Public [Member]</link:label>
    <link:label id="lab_dk_CommonPublicMember_EBDD90D08E8ED7B1B74B47CB8D49FD22_documentation_en-US" xlink:label="lab_dk_CommonPublicMember_87827C7AE5EF517C8D8A9BC0BEC74FEF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">A party to a partnership (public) business who has limited liability. In a limited partnership, only one of the partners will be the general partner and have unlimited liability; the other partners will have limited liability.</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_LimitedPartnersCapitalAccountUnitsOutstanding" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_A226EE25EDC45406BEAF83D52861AC67" xlink:type="locator" />
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    <link:label id="lab_dk_CommonPublicMember_E1ADC5EE9C36D00AFCF67E27CA3B416F_verboseLabel_en-US" xlink:label="lab_dk_CommonPublicMember_E1ADC5EE9C36D00AFCF67E27CA3B416F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Common unitholders - public; 9,113,359 units issued and outstanding at March 31, 2019 (9,109,807 at December 31, 2018)</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_CommonPublicMember" xlink:label="loc_dk_CommonPublicMember_E1ADC5EE9C36D00AFCF67E27CA3B416F" xlink:type="locator" />
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    <link:label id="lab_dk_CommonDelekMember_F5C7171B72F009B853487E27CA3BD07A_verboseLabel_en-US" xlink:label="lab_dk_CommonDelekMember_F5C7171B72F009B853487E27CA3BD07A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Common unitholders - Delek Holdings; 15,294,046 units issued and outstanding at March 31, 2019 (15,294,046 at December 31, 2018)</link:label>
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    <link:label id="lab_us-gaap_AssetsAbstract_76394965A50EB4C29E0E7E27CA3B2291_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract_76394965A50EB4C29E0E7E27CA3B2291" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [Abstract]</link:label>
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    <link:label id="lab_us-gaap_AssetsCurrentAbstract_CFEC9DE2510C23D616A17E27CA3B4D4D_label_en-US" xlink:label="lab_us-gaap_AssetsCurrentAbstract_CFEC9DE2510C23D616A17E27CA3B4D4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Current [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_CFEC9DE2510C23D616A17E27CA3B4D4D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_B0FD620293C90ADEBF0B7E27CA3BAD3D_verboseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_B0FD620293C90ADEBF0B7E27CA3BAD3D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_B0FD620293C90ADEBF0B7E27CA3BAD3D_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_B0FD620293C90ADEBF0B7E27CA3BAD3D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_B0FD620293C90ADEBF0B7E27CA3BAD3D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_C27BE014F979BC7293D27E27CA3B66A2_verboseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_C27BE014F979BC7293D27E27CA3B66A2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accounts receivable</link:label>
    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_C27BE014F979BC7293D27E27CA3B66A2_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_C27BE014F979BC7293D27E27CA3B66A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Receivable, Net, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_C27BE014F979BC7293D27E27CA3B66A2" xlink:type="locator" />
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    <link:label id="lab_us-gaap_InventoryNet_7BC610745C91E68B5E6F7E27CA3BD0AF_verboseLabel_en-US" xlink:label="lab_us-gaap_InventoryNet_7BC610745C91E68B5E6F7E27CA3BD0AF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Inventory</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_7BC610745C91E68B5E6F7E27CA3BD0AF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OtherAssetsCurrent_A5CF62F7246677F33FB17E27CA3BD065_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsCurrent_A5CF62F7246677F33FB17E27CA3BD065" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other current assets</link:label>
    <link:label id="lab_us-gaap_OtherAssetsCurrent_A5CF62F7246677F33FB17E27CA3BD065_label_en-US" xlink:label="lab_us-gaap_OtherAssetsCurrent_A5CF62F7246677F33FB17E27CA3BD065" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_A5CF62F7246677F33FB17E27CA3BD065" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AssetsCurrent_939FFEB1DC319BD200117E27CA3BCAB9_totalLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrent_939FFEB1DC319BD200117E27CA3BCAB9" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total current assets</link:label>
    <link:label id="lab_us-gaap_AssetsCurrent_939FFEB1DC319BD200117E27CA3BCAB9_label_en-US" xlink:label="lab_us-gaap_AssetsCurrent_939FFEB1DC319BD200117E27CA3BCAB9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_939FFEB1DC319BD200117E27CA3BCAB9" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentAbstract_F77F2118ECC70FB1414C7E27CA3B8815_verboseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentAbstract_F77F2118ECC70FB1414C7E27CA3B8815" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Property, plant and equipment:</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentAbstract_F77F2118ECC70FB1414C7E27CA3B8815_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentAbstract_F77F2118ECC70FB1414C7E27CA3B8815" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_F77F2118ECC70FB1414C7E27CA3B8815" xlink:type="locator" />
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    <link:label id="lab_us-gaap_EquityMethodInvestments_2F21C1367236FFA072F77E27CA3B148D_terseLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestments_2F21C1367236FFA072F77E27CA3B148D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity method investments</link:label>
    <link:label id="lab_us-gaap_EquityMethodInvestments_2F21C1367236FFA072F77E27CA3B148D_label_en-US" xlink:label="lab_us-gaap_EquityMethodInvestments_2F21C1367236FFA072F77E27CA3B148D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Method Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="loc_us-gaap_EquityMethodInvestments_2F21C1367236FFA072F77E27CA3B148D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OperatingLeaseRightOfUseAsset_25C3B7F7939AB6F7821F7E27CA3B94E6_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseRightOfUseAsset_25C3B7F7939AB6F7821F7E27CA3B94E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating lease right-of-use assets</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseRightOfUseAsset_25C3B7F7939AB6F7821F7E27CA3B94E6_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseRightOfUseAsset_25C3B7F7939AB6F7821F7E27CA3B94E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Right-of-Use Asset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_25C3B7F7939AB6F7821F7E27CA3B94E6" xlink:type="locator" />
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    <link:label id="lab_us-gaap_Goodwill_23E36E807DFA2CA0A41E7E27CA3B5D2F_label_en-US" xlink:label="lab_us-gaap_Goodwill_23E36E807DFA2CA0A41E7E27CA3B5D2F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_23E36E807DFA2CA0A41E7E27CA3B5D2F" xlink:type="locator" />
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    <link:label id="lab_srt_MinimumMember_185ADCFC6A8D31958B2479964BFB0A41_label_en-US" xlink:label="lab_srt_MinimumMember_185ADCFC6A8D31958B2479964BFB0A41" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_185ADCFC6A8D31958B2479964BFB0A41" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MinimumMember_185ADCFC6A8D31958B2479964BFB0A41" xlink:to="lab_srt_MinimumMember_185ADCFC6A8D31958B2479964BFB0A41" xlink:type="arc" />
    <link:label id="lab_dk_CrudeOilPipelineMember_1A3F5573C089B258016F79964BFC7682_terseLabel_en-US" xlink:label="lab_dk_CrudeOilPipelineMember_1A3F5573C089B258016F79964BFC7682" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Crude Oil Throughput</link:label>
    <link:label id="lab_dk_CrudeOilPipelineMember_1A3F5573C089B258016F79964BFC7682_label_en-US" xlink:label="lab_dk_CrudeOilPipelineMember_1A3F5573C089B258016F79964BFC7682" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Crude Oil Pipeline [Member]</link:label>
    <link:label id="lab_dk_CrudeOilPipelineMember_1A3F5573C089B258016F79964BFC7682_documentation_en-US" xlink:label="lab_dk_CrudeOilPipelineMember_1A3F5573C089B258016F79964BFC7682" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Crude Oil Pipeline [Member]</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_CrudeOilPipelineMember" xlink:label="loc_dk_CrudeOilPipelineMember_1A3F5573C089B258016F79964BFC7682" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_CrudeOilPipelineMember_1A3F5573C089B258016F79964BFC7682" xlink:to="lab_dk_CrudeOilPipelineMember_1A3F5573C089B258016F79964BFC7682" xlink:type="arc" />
    <link:label id="lab_dk_RefinedProductPipelineMember_0BC417A464EF7F48E16B79964BFD70D4_verboseLabel_en-US" xlink:label="lab_dk_RefinedProductPipelineMember_0BC417A464EF7F48E16B79964BFD70D4" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Crude Oil and Refined Products Throughput</link:label>
    <link:label id="lab_dk_RefinedProductPipelineMember_0BC417A464EF7F48E16B79964BFD70D4_label_en-US" xlink:label="lab_dk_RefinedProductPipelineMember_0BC417A464EF7F48E16B79964BFD70D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Refined Product Pipeline [Member]</link:label>
    <link:label id="lab_dk_RefinedProductPipelineMember_0BC417A464EF7F48E16B79964BFD70D4_documentation_en-US" xlink:label="lab_dk_RefinedProductPipelineMember_0BC417A464EF7F48E16B79964BFD70D4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Refined Product Pipeline [Member]</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_RefinedProductPipelineMember" xlink:label="loc_dk_RefinedProductPipelineMember_0BC417A464EF7F48E16B79964BFD70D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_RefinedProductPipelineMember_0BC417A464EF7F48E16B79964BFD70D4" xlink:to="lab_dk_RefinedProductPipelineMember_0BC417A464EF7F48E16B79964BFD70D4" xlink:type="arc" />
    <link:label id="lab_dk_RailOffloadingPipelineMember_46BEB5915943AE39891179964BFD50C6_terseLabel_en-US" xlink:label="lab_dk_RailOffloadingPipelineMember_46BEB5915943AE39891179964BFD50C6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rail Offloading</link:label>
    <link:label id="lab_dk_RailOffloadingPipelineMember_46BEB5915943AE39891179964BFD50C6_label_en-US" xlink:label="lab_dk_RailOffloadingPipelineMember_46BEB5915943AE39891179964BFD50C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rail Offloading Pipeline [Member]</link:label>
    <link:label id="lab_dk_RailOffloadingPipelineMember_46BEB5915943AE39891179964BFD50C6_documentation_en-US" xlink:label="lab_dk_RailOffloadingPipelineMember_46BEB5915943AE39891179964BFD50C6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rail Offloading Services</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_RailOffloadingPipelineMember" xlink:label="loc_dk_RailOffloadingPipelineMember_46BEB5915943AE39891179964BFD50C6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_RailOffloadingPipelineMember_46BEB5915943AE39891179964BFD50C6" xlink:to="lab_dk_RailOffloadingPipelineMember_46BEB5915943AE39891179964BFD50C6" xlink:type="arc" />
    <link:label id="lab_dk_DedicatedTerminallingServicesMember_09E29D3642051A1B248879964BFD4D28_terseLabel_en-US" xlink:label="lab_dk_DedicatedTerminallingServicesMember_09E29D3642051A1B248879964BFD4D28" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Terminalling</link:label>
    <link:label id="lab_dk_DedicatedTerminallingServicesMember_09E29D3642051A1B248879964BFD4D28_label_en-US" xlink:label="lab_dk_DedicatedTerminallingServicesMember_09E29D3642051A1B248879964BFD4D28" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dedicated Terminalling Services [Member]</link:label>
    <link:label id="lab_dk_DedicatedTerminallingServicesMember_09E29D3642051A1B248879964BFD4D28_documentation_en-US" xlink:label="lab_dk_DedicatedTerminallingServicesMember_09E29D3642051A1B248879964BFD4D28" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dedicated Terminalling Services</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_DedicatedTerminallingServicesMember" xlink:label="loc_dk_DedicatedTerminallingServicesMember_09E29D3642051A1B248879964BFD4D28" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_DedicatedTerminallingServicesMember_09E29D3642051A1B248879964BFD4D28" xlink:to="lab_dk_DedicatedTerminallingServicesMember_09E29D3642051A1B248879964BFD4D28" xlink:type="arc" />
    <link:label id="lab_dk_DedicatedAsphaltTerminallingMember_0410483E3F8D4471CA3B79964BFD0D65_terseLabel_en-US" xlink:label="lab_dk_DedicatedAsphaltTerminallingMember_0410483E3F8D4471CA3B79964BFD0D65" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dedicated Asphalt Terminalling</link:label>
    <link:label id="lab_dk_DedicatedAsphaltTerminallingMember_0410483E3F8D4471CA3B79964BFD0D65_label_en-US" xlink:label="lab_dk_DedicatedAsphaltTerminallingMember_0410483E3F8D4471CA3B79964BFD0D65" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dedicated Asphalt Terminalling [Member]</link:label>
    <link:label id="lab_dk_DedicatedAsphaltTerminallingMember_0410483E3F8D4471CA3B79964BFD0D65_documentation_en-US" xlink:label="lab_dk_DedicatedAsphaltTerminallingMember_0410483E3F8D4471CA3B79964BFD0D65" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dedicated Asphalt Terminalling</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_DedicatedAsphaltTerminallingMember" xlink:label="loc_dk_DedicatedAsphaltTerminallingMember_0410483E3F8D4471CA3B79964BFD0D65" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_DedicatedAsphaltTerminallingMember_0410483E3F8D4471CA3B79964BFD0D65" xlink:to="lab_dk_DedicatedAsphaltTerminallingMember_0410483E3F8D4471CA3B79964BFD0D65" xlink:type="arc" />
    <link:label id="lab_dk_StorageThroughputFacilitiesMember_0664DCD2A7DCA64E55D779964BFE5F48_terseLabel_en-US" xlink:label="lab_dk_StorageThroughputFacilitiesMember_0664DCD2A7DCA64E55D779964BFE5F48" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Storage, Throughput Facilities</link:label>
    <link:label id="lab_dk_StorageThroughputFacilitiesMember_0664DCD2A7DCA64E55D779964BFE5F48_label_en-US" xlink:label="lab_dk_StorageThroughputFacilitiesMember_0664DCD2A7DCA64E55D779964BFE5F48" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Storage, Throughput Facilities [Member]</link:label>
    <link:label id="lab_dk_StorageThroughputFacilitiesMember_0664DCD2A7DCA64E55D779964BFE5F48_documentation_en-US" xlink:label="lab_dk_StorageThroughputFacilitiesMember_0664DCD2A7DCA64E55D779964BFE5F48" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Storage, Throughput Facilities</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_StorageThroughputFacilitiesMember" xlink:label="loc_dk_StorageThroughputFacilitiesMember_0664DCD2A7DCA64E55D779964BFE5F48" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_StorageThroughputFacilitiesMember_0664DCD2A7DCA64E55D779964BFE5F48" xlink:to="lab_dk_StorageThroughputFacilitiesMember_0664DCD2A7DCA64E55D779964BFE5F48" xlink:type="arc" />
    <link:label id="lab_dk_StorageAsphaltServicesMember_354429DBCCB047236E0F79964BFE533C_terseLabel_en-US" xlink:label="lab_dk_StorageAsphaltServicesMember_354429DBCCB047236E0F79964BFE533C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Storage Asphalt Services</link:label>
    <link:label id="lab_dk_StorageAsphaltServicesMember_354429DBCCB047236E0F79964BFE533C_label_en-US" xlink:label="lab_dk_StorageAsphaltServicesMember_354429DBCCB047236E0F79964BFE533C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Storage, Asphalt Services [Member]</link:label>
    <link:label id="lab_dk_StorageAsphaltServicesMember_354429DBCCB047236E0F79964BFE533C_documentation_en-US" xlink:label="lab_dk_StorageAsphaltServicesMember_354429DBCCB047236E0F79964BFE533C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Storage, Asphalt Services</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_StorageAsphaltServicesMember" xlink:label="loc_dk_StorageAsphaltServicesMember_354429DBCCB047236E0F79964BFE533C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_StorageAsphaltServicesMember_354429DBCCB047236E0F79964BFE533C" xlink:to="lab_dk_StorageAsphaltServicesMember_354429DBCCB047236E0F79964BFE533C" xlink:type="arc" />
    <link:label id="lab_dk_DedicatedMarketingandSellingMember_586F8DF482E63674102079964BFE0ABB_terseLabel_en-US" xlink:label="lab_dk_DedicatedMarketingandSellingMember_586F8DF482E63674102079964BFE0ABB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Marketing Services</link:label>
    <link:label id="lab_dk_DedicatedMarketingandSellingMember_586F8DF482E63674102079964BFE0ABB_label_en-US" xlink:label="lab_dk_DedicatedMarketingandSellingMember_586F8DF482E63674102079964BFE0ABB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dedicated Marketing and Selling [Member]</link:label>
    <link:label id="lab_dk_DedicatedMarketingandSellingMember_586F8DF482E63674102079964BFE0ABB_documentation_en-US" xlink:label="lab_dk_DedicatedMarketingandSellingMember_586F8DF482E63674102079964BFE0ABB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dedicated Marketing and Selling</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_DedicatedMarketingandSellingMember" xlink:label="loc_dk_DedicatedMarketingandSellingMember_586F8DF482E63674102079964BFE0ABB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_DedicatedMarketingandSellingMember_586F8DF482E63674102079964BFE0ABB" xlink:to="lab_dk_DedicatedMarketingandSellingMember_586F8DF482E63674102079964BFE0ABB" xlink:type="arc" />
    <link:label id="lab_dk_StorageCapacityMember_8F7E49A59A37DA1E0C3779964BFE43EE_terseLabel_en-US" xlink:label="lab_dk_StorageCapacityMember_8F7E49A59A37DA1E0C3779964BFE43EE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Storage Capacity</link:label>
    <link:label id="lab_dk_StorageCapacityMember_8F7E49A59A37DA1E0C3779964BFE43EE_label_en-US" xlink:label="lab_dk_StorageCapacityMember_8F7E49A59A37DA1E0C3779964BFE43EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Storage Capacity [Member]</link:label>
    <link:label id="lab_dk_StorageCapacityMember_8F7E49A59A37DA1E0C3779964BFE43EE_documentation_en-US" xlink:label="lab_dk_StorageCapacityMember_8F7E49A59A37DA1E0C3779964BFE43EE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Storage Capacity</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_StorageCapacityMember" xlink:label="loc_dk_StorageCapacityMember_8F7E49A59A37DA1E0C3779964BFE43EE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_StorageCapacityMember_8F7E49A59A37DA1E0C3779964BFE43EE" xlink:to="lab_dk_StorageCapacityMember_8F7E49A59A37DA1E0C3779964BFE43EE" xlink:type="arc" />
    <link:label id="lab_dk_TermOfAgreement_6A5BD3993D77525B13AD79964BFFB0DA_terseLabel_en-US" xlink:label="lab_dk_TermOfAgreement_6A5BD3993D77525B13AD79964BFFB0DA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term of agreement</link:label>
    <link:label id="lab_dk_TermOfAgreement_6A5BD3993D77525B13AD79964BFFB0DA_label_en-US" xlink:label="lab_dk_TermOfAgreement_6A5BD3993D77525B13AD79964BFFB0DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Term Of Agreement</link:label>
    <link:label id="lab_dk_TermOfAgreement_6A5BD3993D77525B13AD79964BFFB0DA_documentation_en-US" xlink:label="lab_dk_TermOfAgreement_6A5BD3993D77525B13AD79964BFFB0DA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The term of the agreement.  Agreement could be a lease, debt, arrangement, services agreement or other arrangement.</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_TermOfAgreement" xlink:label="loc_dk_TermOfAgreement_6A5BD3993D77525B13AD79964BFFB0DA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_TermOfAgreement_6A5BD3993D77525B13AD79964BFFB0DA" xlink:to="lab_dk_TermOfAgreement_6A5BD3993D77525B13AD79964BFFB0DA" xlink:type="arc" />
    <link:label id="lab_dk_ThroughputCommitmentTariffRate_1AEED98316C3C570FE5979964BFFCA7C_terseLabel_en-US" xlink:label="lab_dk_ThroughputCommitmentTariffRate_1AEED98316C3C570FE5979964BFFCA7C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Throughput commitment tariff rate</link:label>
    <link:label id="lab_dk_ThroughputCommitmentTariffRate_1AEED98316C3C570FE5979964BFFCA7C_label_en-US" xlink:label="lab_dk_ThroughputCommitmentTariffRate_1AEED98316C3C570FE5979964BFFCA7C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Throughput Commitment Tariff Rate</link:label>
    <link:label id="lab_dk_ThroughputCommitmentTariffRate_1AEED98316C3C570FE5979964BFFCA7C_documentation_en-US" xlink:label="lab_dk_ThroughputCommitmentTariffRate_1AEED98316C3C570FE5979964BFFCA7C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Throughput Commitment Tariff Rate</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_ThroughputCommitmentTariffRate" xlink:label="loc_dk_ThroughputCommitmentTariffRate_1AEED98316C3C570FE5979964BFFCA7C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_ThroughputCommitmentTariffRate_1AEED98316C3C570FE5979964BFFCA7C" xlink:to="lab_dk_ThroughputCommitmentTariffRate_1AEED98316C3C570FE5979964BFFCA7C" xlink:type="arc" />
    <link:label id="lab_dk_TermOfAgreementExtension_66A7AFFA0E128B3F5FBC79964BFFAE51_terseLabel_en-US" xlink:label="lab_dk_TermOfAgreementExtension_66A7AFFA0E128B3F5FBC79964BFFAE51" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term of agreement, extension</link:label>
    <link:label id="lab_dk_TermOfAgreementExtension_66A7AFFA0E128B3F5FBC79964BFFAE51_label_en-US" xlink:label="lab_dk_TermOfAgreementExtension_66A7AFFA0E128B3F5FBC79964BFFAE51" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Term Of Agreement, Extension</link:label>
    <link:label id="lab_dk_TermOfAgreementExtension_66A7AFFA0E128B3F5FBC79964BFFAE51_documentation_en-US" xlink:label="lab_dk_TermOfAgreementExtension_66A7AFFA0E128B3F5FBC79964BFFAE51" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Term Of Agreement, Extension</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_TermOfAgreementExtension" xlink:label="loc_dk_TermOfAgreementExtension_66A7AFFA0E128B3F5FBC79964BFFAE51" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_TermOfAgreementExtension_66A7AFFA0E128B3F5FBC79964BFFAE51" xlink:to="lab_dk_TermOfAgreementExtension_66A7AFFA0E128B3F5FBC79964BFFAE51" xlink:type="arc" />
    <link:label id="lab_dk_RelatedPartyAnnualServiceFee_3F1CC263B057FCCAE44979964C003C2C_terseLabel_en-US" xlink:label="lab_dk_RelatedPartyAnnualServiceFee_3F1CC263B057FCCAE44979964C003C2C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related party annual service fee</link:label>
    <link:label id="lab_dk_RelatedPartyAnnualServiceFee_3F1CC263B057FCCAE44979964C003C2C_label_en-US" xlink:label="lab_dk_RelatedPartyAnnualServiceFee_3F1CC263B057FCCAE44979964C003C2C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Annual Service Fee</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_0E15DDECA02D3E9E729547CB8F1A9E89_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_AE0C2F1293755FF28451BCCAEC20F9EE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Summary of Fair Value Hierarchy for Financial Assets</link:label>
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    <link:label id="lab_dk_IncentiveDistributionByTargetAxis_F404A9848189B265E458945C6928B5E0_terseLabel_en-US" xlink:label="lab_dk_IncentiveDistributionByTargetAxis_F404A9848189B265E458945C6928B5E0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incentive Distribution By Target [Axis]</link:label>
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    <link:label id="lab_dk_IncentiveDistributionRightsDomain_8D4F975B8A270513EC85945C6928DA74_terseLabel_en-US" xlink:label="lab_dk_IncentiveDistributionRightsDomain_8D4F975B8A270513EC85945C6928DA74" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incentive Distribution Rights [Domain]</link:label>
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    <link:label id="lab_dk_MinimumQuarterlyDistributionMember_DC8E859F17C795C5629C945C6929E539_terseLabel_en-US" xlink:label="lab_dk_MinimumQuarterlyDistributionMember_DC8E859F17C795C5629C945C6929E539" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum quarterly distribution</link:label>
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    <link:label id="lab_dk_MinimumQuarterlyDistributionMember_DC8E859F17C795C5629C945C6929E539_documentation_en-US" xlink:label="lab_dk_MinimumQuarterlyDistributionMember_DC8E859F17C795C5629C945C6929E539" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Minimum quarterly distribution [Member]</link:label>
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    <link:label id="lab_dk_FirstTargetDistributionMember_49E06E3A55C340B22D18945C692E693E_terseLabel_en-US" xlink:label="lab_dk_FirstTargetDistributionMember_49E06E3A55C340B22D18945C692E693E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">First target distribution</link:label>
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    <link:label id="lab_dk_FirstTargetDistributionMember_49E06E3A55C340B22D18945C692E693E_documentation_en-US" xlink:label="lab_dk_FirstTargetDistributionMember_49E06E3A55C340B22D18945C692E693E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">First target distribution [Member]</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_FirstTargetDistributionMember" xlink:label="loc_dk_FirstTargetDistributionMember_49E06E3A55C340B22D18945C692E693E" xlink:type="locator" />
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    <link:label id="lab_dk_SecondTargetDistributionMember_26FBEF6AEEADD2E0B3D0945C692E27DD_terseLabel_en-US" xlink:label="lab_dk_SecondTargetDistributionMember_26FBEF6AEEADD2E0B3D0945C692E27DD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Second target distribution</link:label>
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    <link:label id="lab_us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis_29F2613B7FBD0318560E945C692FEC26_terseLabel_en-US" xlink:label="lab_us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis_29F2613B7FBD0318560E945C692FEC26" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Managing Member or General Partner [Axis]</link:label>
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    <link:label id="lab_dk_IncentiveDistributionDistributionSplitMarginalPercentage_9070E1BDA1D6C753D0C1945C693169DA_terseLabel_en-US" xlink:label="lab_dk_IncentiveDistributionDistributionSplitMarginalPercentage_9070E1BDA1D6C753D0C1945C693169DA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Marginal Percentage Interest in Distributions (as percent)</link:label>
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    <link:label id="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest_47932B63F5FC8EDB94977B0D43850B0F_terseLabel_en-US" xlink:label="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest_47932B63F5FC8EDB94977B0D43850B0F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Delek's limited partner ownership interest (as percent)</link:label>
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    <link:loc xlink:href="dk-20190331.xsd#dk_PartnersCapitalAccountUnitsIssued" xlink:label="loc_dk_PartnersCapitalAccountUnitsIssued_C25111429D8D0E5A245294ADD30EB7B2" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsOfFinancingCosts_4C7B52F4090936E8D50A94ADD3FD89BE_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfFinancingCosts_4C7B52F4090936E8D50A94ADD3FD89BE" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Deferred financing costs paid</link:label>
    <link:label id="lab_us-gaap_PaymentsOfFinancingCosts_4C7B52F4090936E8D50A94ADD3FD89BE_label_en-US" xlink:label="lab_us-gaap_PaymentsOfFinancingCosts_4C7B52F4090936E8D50A94ADD3FD89BE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Financing Costs</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_251FEDF0EF1D9BBD17B594ADD3FD6F7C_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_251FEDF0EF1D9BBD17B594ADD3FD6F7C" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash (used in) provided by financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_251FEDF0EF1D9BBD17B594ADD3FD6F7C_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_251FEDF0EF1D9BBD17B594ADD3FD6F7C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities, Continuing Operations</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_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_251FEDF0EF1D9BBD17B594ADD3FD6F7C" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_251FEDF0EF1D9BBD17B594ADD3FD6F7C" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_359F043900A1A7C250F394ADD3FDC37D_totalLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_359F043900A1A7C250F394ADD3FDC37D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net increase in cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_359F043900A1A7C250F394ADD3FDC37D_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_359F043900A1A7C250F394ADD3FDC37D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, Period Increase (Decrease)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_359F043900A1A7C250F394ADD3FDC37D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_4FE96A46557DC4033FA994ADD3FD103A_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_4FE96A46557DC4033FA994ADD3FD103A" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents at the beginning of the period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_4FE96A46557DC4033FA994ADD3FD103A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_4F46C6A9336A0E40EE4D94ADD3FEB48C_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_4F46C6A9336A0E40EE4D94ADD3FEB48C" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents at the end of the period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_4F46C6A9336A0E40EE4D94ADD3FEB48C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_630FFFA74D9A2F86944D94ADD3FE3A57_verboseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_630FFFA74D9A2F86944D94ADD3FE3A57" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Supplemental disclosures of cash flow information:</link:label>
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_630FFFA74D9A2F86944D94ADD3FE3A57_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_630FFFA74D9A2F86944D94ADD3FE3A57" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_630FFFA74D9A2F86944D94ADD3FE3A57" xlink:type="locator" />
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    <link:label id="lab_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_F5DAAACABDFCE086441794ADD3FEFBF9_verboseLabel_en-US" xlink:label="lab_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_F5DAAACABDFCE086441794ADD3FEFBF9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash paid during the period for:</link:label>
    <link:label id="lab_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_F5DAAACABDFCE086441794ADD3FEFBF9_label_en-US" xlink:label="lab_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_F5DAAACABDFCE086441794ADD3FEFBF9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information Cash Paid During Period Abstract</link:label>
    <link:label id="lab_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_F5DAAACABDFCE086441794ADD3FEFBF9_documentation_en-US" xlink:label="lab_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_F5DAAACABDFCE086441794ADD3FEFBF9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash paid during the period for:</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract" xlink:label="loc_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_F5DAAACABDFCE086441794ADD3FEFBF9" xlink:type="locator" />
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    <link:label id="lab_us-gaap_InterestPaidNet_65142075F7392D96DF7A94ADD3FEEE55_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet_65142075F7392D96DF7A94ADD3FEEE55" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest</link:label>
    <link:label id="lab_us-gaap_InterestPaidNet_65142075F7392D96DF7A94ADD3FEEE55_label_en-US" xlink:label="lab_us-gaap_InterestPaidNet_65142075F7392D96DF7A94ADD3FEEE55" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Paid, Excluding Capitalized Interest, Operating Activities</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxesPaid_8BF06A809DCB0D59A40394ADD3FF79A1_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaid_8BF06A809DCB0D59A40394ADD3FF79A1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income taxes</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesPaid_8BF06A809DCB0D59A40394ADD3FF79A1_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaid_8BF06A809DCB0D59A40394ADD3FF79A1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxesPaid" xlink:label="loc_us-gaap_IncomeTaxesPaid_8BF06A809DCB0D59A40394ADD3FF79A1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesPaid_8BF06A809DCB0D59A40394ADD3FF79A1" xlink:to="lab_us-gaap_IncomeTaxesPaid_8BF06A809DCB0D59A40394ADD3FF79A1" xlink:type="arc" />
    <link:label id="lab_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_C076844A81A41DE6818794ADD3FF07FC_terseLabel_en-US" xlink:label="lab_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_C076844A81A41DE6818794ADD3FF07FC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-cash investing activities:</link:label>
    <link:label id="lab_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_C076844A81A41DE6818794ADD3FF07FC_label_en-US" xlink:label="lab_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_C076844A81A41DE6818794ADD3FF07FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Flow, Noncash Investing Activities Disclosure [Abstract]</link:label>
    <link:label id="lab_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_C076844A81A41DE6818794ADD3FF07FC_documentation_en-US" xlink:label="lab_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_C076844A81A41DE6818794ADD3FF07FC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash Flow, Noncash Investing Activities Disclosure [Abstract]</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract" xlink:label="loc_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_C076844A81A41DE6818794ADD3FF07FC" xlink:type="locator" />
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    <link:label id="lab_dk_NonCashInvestingActivitiesIncreaseDecreaseinAccruedCapitalExpenditures_806436F1860317CB994094ADD3FF2788_terseLabel_en-US" xlink:label="lab_dk_NonCashInvestingActivitiesIncreaseDecreaseinAccruedCapitalExpenditures_806436F1860317CB994094ADD3FF2788" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Decrease in accrued capital expenditures</link:label>
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    <link:loc xlink:href="dk-20190331.xsd#dk_NonCashInvestingActivitiesIncreaseDecreaseinAccruedCapitalExpenditures" xlink:label="loc_dk_NonCashInvestingActivitiesIncreaseDecreaseinAccruedCapitalExpenditures_806436F1860317CB994094ADD3FF2788" xlink:type="locator" />
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    <link:label id="lab_dk_NoncashfinancingactivitiesAbstract_0C8F554D2629286A74BA94ADD3FF27A4_terseLabel_en-US" xlink:label="lab_dk_NoncashfinancingactivitiesAbstract_0C8F554D2629286A74BA94ADD3FF27A4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-cash financing activities:</link:label>
    <link:label id="lab_dk_NoncashfinancingactivitiesAbstract_0C8F554D2629286A74BA94ADD3FF27A4_label_en-US" xlink:label="lab_dk_NoncashfinancingactivitiesAbstract_0C8F554D2629286A74BA94ADD3FF27A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-cash financing activities [Abstract]</link:label>
    <link:label id="lab_dk_NoncashfinancingactivitiesAbstract_0C8F554D2629286A74BA94ADD3FF27A4_documentation_en-US" xlink:label="lab_dk_NoncashfinancingactivitiesAbstract_0C8F554D2629286A74BA94ADD3FF27A4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non-cash financing activities [Abstract]</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_NoncashfinancingactivitiesAbstract" xlink:label="loc_dk_NoncashfinancingactivitiesAbstract_0C8F554D2629286A74BA94ADD3FF27A4" xlink:type="locator" />
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    <link:label id="lab_dk_NonCashLeaseLiabilityRecognitionofRightOfUseAsset_4B662ABBB6F52DCC3EFA94ADD3FFC334_terseLabel_en-US" xlink:label="lab_dk_NonCashLeaseLiabilityRecognitionofRightOfUseAsset_4B662ABBB6F52DCC3EFA94ADD3FFC334" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-cash lease liability arising from recognition of right of use assets upon adoption of ASU 2016-02</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_DebtInstrumentRedemptionPeriodAxis" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_761DECF6246A5414A8974995AC085BAD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_761DECF6246A5414A8974995AC085BAD" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_761DECF6246A5414A8974995AC085BAD" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_6451EF2E04E63F4914A40FA4BA4059C1_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_1A55F4C386625D6C98F4DD423088E1A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Domain]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_6451EF2E04E63F4914A40FA4BA4059C1_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_1A55F4C386625D6C98F4DD423088E1A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_1A55F4C386625D6C98F4DD423088E1A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_1A55F4C386625D6C98F4DD423088E1A3" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_1A55F4C386625D6C98F4DD423088E1A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_50B886656B12EA9690E10FA4BA411235_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_8A17438EB9B55159B1687773697E49C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Anytime prior to May 15, 2020</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_50B886656B12EA9690E10FA4BA411235_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_8A17438EB9B55159B1687773697E49C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period One [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_8A17438EB9B55159B1687773697E49C7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_8A17438EB9B55159B1687773697E49C7" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_8A17438EB9B55159B1687773697E49C7" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_2AA3E15B75ED670E5FD00FA4BA414795_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_7AA199AA0ED85E9099B2946AD1DB3133" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Twelve-month period beginning on May 15, 2020</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_2AA3E15B75ED670E5FD00FA4BA414795_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_7AA199AA0ED85E9099B2946AD1DB3133" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Two [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_7AA199AA0ED85E9099B2946AD1DB3133" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_7AA199AA0ED85E9099B2946AD1DB3133" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_7AA199AA0ED85E9099B2946AD1DB3133" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_66471527CCA459BDEE140FA4BA4146CA_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_D799B8D5257456E5B40330780E877C12" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Twelve-month period beginning on May 15, 2021</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_66471527CCA459BDEE140FA4BA4146CA_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_D799B8D5257456E5B40330780E877C12" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Three [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_D799B8D5257456E5B40330780E877C12" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_D799B8D5257456E5B40330780E877C12" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_D799B8D5257456E5B40330780E877C12" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember_5FDC2A75010EB4513BAB0FA4BA41EE8F_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember_23E3D0C1671851B38E82464CCE79BC45" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Twelve-month period beginning on May 15, 2022</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember_5FDC2A75010EB4513BAB0FA4BA41EE8F_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember_23E3D0C1671851B38E82464CCE79BC45" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Four [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodFourMember" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodFourMember_23E3D0C1671851B38E82464CCE79BC45" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodFourMember_23E3D0C1671851B38E82464CCE79BC45" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember_23E3D0C1671851B38E82464CCE79BC45" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodFiveMember_2811BE9795BC318E42E00FA4BA41860D_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodFiveMember_CD17172BC5D15C83A15F01E717B7CBD1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Beginning on May 15, 2023 and thereafter</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodFiveMember_2811BE9795BC318E42E00FA4BA41860D_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodFiveMember_CD17172BC5D15C83A15F01E717B7CBD1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Five [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodFiveMember" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodFiveMember_CD17172BC5D15C83A15F01E717B7CBD1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodFiveMember_CD17172BC5D15C83A15F01E717B7CBD1" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodFiveMember_CD17172BC5D15C83A15F01E717B7CBD1" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_740BAD72DD86DAE8BD430FA4BA42A025_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_E66905606B6D565180A5D5D21434A056" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Face amount of debt</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_740BAD72DD86DAE8BD430FA4BA42A025_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_E66905606B6D565180A5D5D21434A056" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">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_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_E66905606B6D565180A5D5D21434A056" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentFaceAmount_E66905606B6D565180A5D5D21434A056" xlink:to="lab_us-gaap_DebtInstrumentFaceAmount_E66905606B6D565180A5D5D21434A056" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_B8D8EFE0C7996CFD15F50FA4BA4204CB_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_54DC6249327B5B548E7CD6AEC1F42997" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate (as percent)</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_B8D8EFE0C7996CFD15F50FA4BA4204CB_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_54DC6249327B5B548E7CD6AEC1F42997" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_54DC6249327B5B548E7CD6AEC1F42997" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_54DC6249327B5B548E7CD6AEC1F42997" xlink:to="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_54DC6249327B5B548E7CD6AEC1F42997" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_7EE6D3243A31208DCD730FA4BA4274B4_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_0062AD03AA5A505EB162546CD1477AA5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redemption price, percentage of principal amount redeemed (as percent)</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_7EE6D3243A31208DCD730FA4BA4274B4_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_0062AD03AA5A505EB162546CD1477AA5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_0062AD03AA5A505EB162546CD1477AA5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_0062AD03AA5A505EB162546CD1477AA5" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_0062AD03AA5A505EB162546CD1477AA5" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_3D62219EB3DDF3DD55850FA4BA42DC03_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_1DAAA6854B0056F8B841F84A118AF758" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redemption price (as percent)</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_3D62219EB3DDF3DD55850FA4BA42DC03_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_1DAAA6854B0056F8B841F84A118AF758" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Price, Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_1DAAA6854B0056F8B841F84A118AF758" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_1DAAA6854B0056F8B841F84A118AF758" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_1DAAA6854B0056F8B841F84A118AF758" xlink:type="arc" />
    <link:label id="lab_dk_DebtInstrumentPercentageofPrincipalAmountPurchasedintheEventofChangeinCommonControl_5357A2998F7B446319170FA4BA42295C_terseLabel_en-US" xlink:label="lab_dk_DebtInstrumentPercentageofPrincipalAmountPurchasedintheEventofChangeinCommonControl_E74CAC42CB2F59D093557536A1D8F0E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchase price (as percent)</link:label>
    <link:label id="lab_dk_DebtInstrumentPercentageofPrincipalAmountPurchasedintheEventofChangeinCommonControl_5357A2998F7B446319170FA4BA42295C_label_en-US" xlink:label="lab_dk_DebtInstrumentPercentageofPrincipalAmountPurchasedintheEventofChangeinCommonControl_E74CAC42CB2F59D093557536A1D8F0E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage of Principal Amount Purchased, in the Event of Change in Common Control</link:label>
    <link:label id="lab_dk_DebtInstrumentPercentageofPrincipalAmountPurchasedintheEventofChangeinCommonControl_5357A2998F7B446319170FA4BA42295C_documentation_en-US" xlink:label="lab_dk_DebtInstrumentPercentageofPrincipalAmountPurchasedintheEventofChangeinCommonControl_E74CAC42CB2F59D093557536A1D8F0E7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage of Principal Amount Purchased, in the Event of Change in Common Control</link:label>
    <link:loc xlink:href="dk-20190331.xsd#dk_DebtInstrumentPercentageofPrincipalAmountPurchasedintheEventofChangeinCommonControl" xlink:label="loc_dk_DebtInstrumentPercentageofPrincipalAmountPurchasedintheEventofChangeinCommonControl_E74CAC42CB2F59D093557536A1D8F0E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dk_DebtInstrumentPercentageofPrincipalAmountPurchasedintheEventofChangeinCommonControl_E74CAC42CB2F59D093557536A1D8F0E7" xlink:to="lab_dk_DebtInstrumentPercentageofPrincipalAmountPurchasedintheEventofChangeinCommonControl_E74CAC42CB2F59D093557536A1D8F0E7" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCredit_54382C1B3319CAF186EB0FA4BA4312C4_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCredit_DC128EE73355502490D1EF8C11DE8C8C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Line of Credit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_DC128EE73355502490D1EF8C11DE8C8C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCredit_DC128EE73355502490D1EF8C11DE8C8C" xlink:to="lab_us-gaap_LineOfCredit_DC128EE73355502490D1EF8C11DE8C8C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredFinanceCostsNet_8ACAFB0679AD1FA08F5E0FA4BA43734F_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet_03C3220C7751510989DCA617C41163DA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred financing costs</link:label>
    <link:label id="lab_us-gaap_DeferredFinanceCostsNet_8ACAFB0679AD1FA08F5E0FA4BA43734F_label_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet_03C3220C7751510989DCA617C41163DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Issuance Costs, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_03C3220C7751510989DCA617C41163DA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_03C3220C7751510989DCA617C41163DA" xlink:to="lab_us-gaap_DeferredFinanceCostsNet_03C3220C7751510989DCA617C41163DA" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscount_1B97F07EAE8ECE8157270FA4BA430DA3_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscount_CCDE9230A5E05A9CB83F48EAA1C4F7CB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt discount</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscount_1B97F07EAE8ECE8157270FA4BA430DA3_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscount_CCDE9230A5E05A9CB83F48EAA1C4F7CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Unamortized Discount</link:label>
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