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      <link:roleType id="GENERALANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESMAINTENANCEDEPOSITSDetails" roleURI="http://www.alaskaair.com/role/GENERALANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESMAINTENANCEDEPOSITSDetails">
        <link:definition>9954493 - Disclosure - GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - MAINTENANCE DEPOSITS (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="GENERALANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESLEASERETURNPROVISIONDetails" roleURI="http://www.alaskaair.com/role/GENERALANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESLEASERETURNPROVISIONDetails">
        <link:definition>9954494 - Disclosure - GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - LEASE RETURN PROVISION (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="FLEETTRANSITIONDetails" roleURI="http://www.alaskaair.com/role/FLEETTRANSITIONDetails">
        <link:definition>9954495 - Disclosure - FLEET TRANSITION (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="COVID19PANDEMICNARRATIVEDetails" roleURI="http://www.alaskaair.com/role/COVID19PANDEMICNARRATIVEDetails">
        <link:definition>9954496 - Disclosure - COVID-19 PANDEMIC NARRATIVE (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="REVENUEFROMCONTRACTSWITHCUSTOMERSDetails" roleURI="http://www.alaskaair.com/role/REVENUEFROMCONTRACTSWITHCUSTOMERSDetails">
        <link:definition>9954497 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="REVENUEFROMCONTRACTSWITHCUSTOMERSContractLiabilitiesActivityDetails" roleURI="http://www.alaskaair.com/role/REVENUEFROMCONTRACTSWITHCUSTOMERSContractLiabilitiesActivityDetails">
        <link:definition>9954498 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS Contract Liabilities Activity (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="REVENUEFROMCONTRACTSWITHCUSTOMERSNarrativeDetails" roleURI="http://www.alaskaair.com/role/REVENUEFROMCONTRACTSWITHCUSTOMERSNarrativeDetails">
        <link:definition>9954499 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS Narrative (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="DERIVATIVEINSTRUMENTSBALANCESHEETCLASSIFICATIONDetails" roleURI="http://www.alaskaair.com/role/DERIVATIVEINSTRUMENTSBALANCESHEETCLASSIFICATIONDetails">
        <link:definition>9954500 - Disclosure - DERIVATIVE INSTRUMENTS - BALANCE SHEET CLASSIFICATION (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DERIVATIVEINSTRUMENTSINCOMESTATEMENTDetails" roleURI="http://www.alaskaair.com/role/DERIVATIVEINSTRUMENTSINCOMESTATEMENTDetails">
        <link:definition>9954501 - Disclosure - DERIVATIVE INSTRUMENTS - INCOME STATEMENT (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DERIVATIVEINSTRUMENTSFAIRVALUEOFHEDGEPOSITIONSDetails" roleURI="http://www.alaskaair.com/role/DERIVATIVEINSTRUMENTSFAIRVALUEOFHEDGEPOSITIONSDetails">
        <link:definition>9954502 - Disclosure - DERIVATIVE INSTRUMENTS - FAIR VALUE OF HEDGE POSITIONS (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEMEASUREMENTSFAIRVALUEOFASSETSANDLIABILITIESDetails" roleURI="http://www.alaskaair.com/role/FAIRVALUEMEASUREMENTSFAIRVALUEOFASSETSANDLIABILITIESDetails">
        <link:definition>9954503 - Disclosure - FAIR VALUE MEASUREMENTS - FAIR VALUE OF ASSETS AND LIABILITIES (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEMEASUREMENTSFAIRVALUEMEASUREMENTSCASHCASHEQUIVALENTSANDMARKETABLESECURITIESMATURITIESDetails" roleURI="http://www.alaskaair.com/role/FAIRVALUEMEASUREMENTSFAIRVALUEMEASUREMENTSCASHCASHEQUIVALENTSANDMARKETABLESECURITIESMATURITIESDetails">
        <link:definition>9954504 - Disclosure - FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS - CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES - MATURITIES (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="FAIRVALUEMEASUREMENTSLONGTERMDEBTDetails" roleURI="http://www.alaskaair.com/role/FAIRVALUEMEASUREMENTSLONGTERMDEBTDetails">
        <link:definition>9954505 - Disclosure - FAIR VALUE MEASUREMENTS - LONG-TERM DEBT (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="LONGTERMDEBTSCHEDULEOFLONGTERMDEBTDetails" roleURI="http://www.alaskaair.com/role/LONGTERMDEBTSCHEDULEOFLONGTERMDEBTDetails">
        <link:definition>9954506 - Disclosure - LONG-TERM DEBT - SCHEDULE OF LONG-TERM DEBT (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LONGTERMDEBTLONGTERMDEBTSECUREDDEBTDetails" roleURI="http://www.alaskaair.com/role/LONGTERMDEBTLONGTERMDEBTSECUREDDEBTDetails">
        <link:definition>9954507 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - SECURED DEBT (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LONGTERMDEBTLINEOFCREDITDetails" roleURI="http://www.alaskaair.com/role/LONGTERMDEBTLINEOFCREDITDetails">
        <link:definition>9954508 - Disclosure - LONG-TERM DEBT - LINE OF CREDIT (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESNARRATIVEDetails" roleURI="http://www.alaskaair.com/role/LEASESNARRATIVEDetails">
        <link:definition>9954509 - Disclosure - LEASES - NARRATIVE (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESScheduleofLeasedAssetsDetails" roleURI="http://www.alaskaair.com/role/LEASESScheduleofLeasedAssetsDetails">
        <link:definition>9954510 - Disclosure - LEASES - Schedule of Leased Assets (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESLeaseCostDetails" roleURI="http://www.alaskaair.com/role/LEASESLeaseCostDetails">
        <link:definition>9954511 - Disclosure - LEASES - Lease Cost (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESMaturityofLeaseLiabilitiesDetails" roleURI="http://www.alaskaair.com/role/LEASESMaturityofLeaseLiabilitiesDetails">
        <link:definition>9954512 - Disclosure - LEASES - Maturity of Lease Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESFutureMinimumLeasePaymentsDetails" roleURI="http://www.alaskaair.com/role/LEASESFutureMinimumLeasePaymentsDetails">
        <link:definition>9954513 - Disclosure - LEASES - Future Minimum Lease Payments (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INCOMETAXESDEFERREDTAXASSETSANDLIABILITIESDetails" roleURI="http://www.alaskaair.com/role/INCOMETAXESDEFERREDTAXASSETSANDLIABILITIESDetails">
        <link:definition>9954514 - Disclosure - INCOME TAXES - DEFERRED TAX ASSETS AND LIABILITIES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INCOMETAXESCOMPONENTSOFTAXEXPENSEDetails" roleURI="http://www.alaskaair.com/role/INCOMETAXESCOMPONENTSOFTAXEXPENSEDetails">
        <link:definition>9954515 - Disclosure - INCOME TAXES - COMPONENTS OF TAX EXPENSE (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INCOMETAXESEFFECTIVEINCOMETAXRECONCILIATIONDetails" roleURI="http://www.alaskaair.com/role/INCOMETAXESEFFECTIVEINCOMETAXRECONCILIATIONDetails">
        <link:definition>9954516 - Disclosure - INCOME TAXES - EFFECTIVE INCOME TAX RECONCILIATION (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INCOMETAXESINCOMETAXESUNCERTAINTAXPOSITIONSDetails" roleURI="http://www.alaskaair.com/role/INCOMETAXESINCOMETAXESUNCERTAINTAXPOSITIONSDetails">
        <link:definition>9954517 - Disclosure - INCOME TAXES INCOME TAXES - UNCERTAIN TAX POSITIONS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INCOMETAXESINCOMETAXESNARRATIVEDetails" roleURI="http://www.alaskaair.com/role/INCOMETAXESINCOMETAXESNARRATIVEDetails">
        <link:definition>9954518 - Disclosure - INCOME TAXES INCOME TAXES NARRATIVE (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INCOMETAXESNEWACCOUNTINGSTANDARDSDetails" roleURI="http://www.alaskaair.com/role/INCOMETAXESNEWACCOUNTINGSTANDARDSDetails">
        <link:definition>9954519 - Disclosure - INCOME TAXES NEW ACCOUNTING STANDARDS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSEMPLOYEEBENEFITPLANSADDITIONALINFORMATIONDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSEMPLOYEEBENEFITPLANSADDITIONALINFORMATIONDetails">
        <link:definition>9954520 - Disclosure - EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS - ADDITIONAL INFORMATION (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSASSUMPTIONSDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSASSUMPTIONSDetails">
        <link:definition>9954521 - Disclosure - EMPLOYEE BENEFIT PLANS - ASSUMPTIONS (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSPLANASSETSDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSPLANASSETSDetails">
        <link:definition>9954522 - Disclosure - EMPLOYEE BENEFIT PLANS - PLAN ASSETS (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSFUNDEDSTATUSDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSFUNDEDSTATUSDetails">
        <link:definition>9954523 - Disclosure - EMPLOYEE BENEFIT PLANS - FUNDED STATUS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSAMOUNTSRECOGNIZEDINCONSOLIDATEDBALANCESHEETSDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSAMOUNTSRECOGNIZEDINCONSOLIDATEDBALANCESHEETSDetails">
        <link:definition>9954524 - Disclosure - EMPLOYEE BENEFIT PLANS - AMOUNTS RECOGNIZED IN CONSOLIDATED BALANCE SHEETS (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSEXPECTEDAMORTIZATIONFROMAOCIDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSEXPECTEDAMORTIZATIONFROMAOCIDetails">
        <link:definition>9954525 - Disclosure - EMPLOYEE BENEFIT PLANS - EXPECTED AMORTIZATION FROM AOCI (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSNETPENSIONEXPENSEDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSNETPENSIONEXPENSEDetails">
        <link:definition>9954526 - Disclosure - EMPLOYEE BENEFIT PLANS - NET PENSION EXPENSE (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSFUTUREBENEFITSEXPECTEDTOBEPAIDDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSFUTUREBENEFITSEXPECTEDTOBEPAIDDetails">
        <link:definition>9954527 - Disclosure - EMPLOYEE BENEFIT PLANS - FUTURE BENEFITS EXPECTED TO BE PAID (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSEMPLOYEEBENEFITPLANSPOSTRETIREMENTMEDICALBENEFITSDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSEMPLOYEEBENEFITPLANSPOSTRETIREMENTMEDICALBENEFITSDetails">
        <link:definition>9954528 - Disclosure - EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS - POSTRETIREMENT MEDICAL BENEFITS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSDEFINEDCONTRIBUTIONPLANSDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSDEFINEDCONTRIBUTIONPLANSDetails">
        <link:definition>9954529 - Disclosure - EMPLOYEE BENEFIT PLANS - DEFINED CONTRIBUTION PLANS (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSPILOTLONGTERMDISABILITYBENEFITSDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSPILOTLONGTERMDISABILITYBENEFITSDetails">
        <link:definition>9954530 - Disclosure - EMPLOYEE BENEFIT PLANS - PILOT LONG-TERM DISABILITY BENEFITS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSEMPLOYEEINCENTIVEPAYPLANSDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSEMPLOYEEINCENTIVEPAYPLANSDetails">
        <link:definition>9954531 - Disclosure - EMPLOYEE BENEFIT PLANS - EMPLOYEE INCENTIVE-PAY PLANS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSPROJECTEDBENEFITOBLIGATIONDetails" roleURI="http://www.alaskaair.com/role/EMPLOYEEBENEFITPLANSPROJECTEDBENEFITOBLIGATIONDetails">
        <link:definition>9954532 - Disclosure - EMPLOYEE BENEFIT PLANS - PROJECTED BENEFIT OBLIGATION (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMITMENTSANDCONTINGENCIESCOMMITMENTSANDCONTINGENCIESDetails" roleURI="http://www.alaskaair.com/role/COMMITMENTSANDCONTINGENCIESCOMMITMENTSANDCONTINGENCIESDetails">
        <link:definition>9954533 - Disclosure - COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SHAREHOLDERSEQUITYSHAREHOLDERSEQUITYSTOCKCHANGESDetails" roleURI="http://www.alaskaair.com/role/SHAREHOLDERSEQUITYSHAREHOLDERSEQUITYSTOCKCHANGESDetails">
        <link:definition>9954534 - Disclosure - SHAREHOLDER'S EQUITY SHAREHOLDERS' EQUITY - STOCK CHANGES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SHAREHOLDERSEQUITYSHAREHOLDERSEQUITYDIVIDENDSDetails" roleURI="http://www.alaskaair.com/role/SHAREHOLDERSEQUITYSHAREHOLDERSEQUITYDIVIDENDSDetails">
        <link:definition>9954535 - Disclosure - SHAREHOLDER'S EQUITY SHAREHOLDERS' EQUITY - DIVIDENDS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SHAREHOLDERSEQUITYCOMMONSTOCKREPURCHASEDetails" roleURI="http://www.alaskaair.com/role/SHAREHOLDERSEQUITYCOMMONSTOCKREPURCHASEDetails">
        <link:definition>9954536 - Disclosure - SHAREHOLDER'S EQUITY - COMMON STOCK REPURCHASE (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SHAREHOLDERSEQUITYSHAREHOLDERSEQUITYOTHERDetails" roleURI="http://www.alaskaair.com/role/SHAREHOLDERSEQUITYSHAREHOLDERSEQUITYOTHERDetails">
        <link:definition>9954537 - Disclosure - SHAREHOLDER'S EQUITY SHAREHOLDERS' EQUITY - OTHER (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SHAREHOLDERSEQUITYSHAREHOLDERSEQUITYACCUMULATEDOTHERCOMPREHENSIVELOSSDetails" roleURI="http://www.alaskaair.com/role/SHAREHOLDERSEQUITYSHAREHOLDERSEQUITYACCUMULATEDOTHERCOMPREHENSIVELOSSDetails">
        <link:definition>9954538 - Disclosure - SHAREHOLDER'S EQUITY SHAREHOLDERS' EQUITY - ACCUMULATED OTHER COMPREHENSIVE LOSS (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SHAREHOLDERSEQUITYCARESActIssuanceDetails" roleURI="http://www.alaskaair.com/role/SHAREHOLDERSEQUITYCARESActIssuanceDetails">
        <link:definition>9954539 - Disclosure - SHAREHOLDER'S EQUITY CARES Act Issuance (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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  <xs:element id="alk_DefinedBenefitInterestCostPBO" abstract="false" name="DefinedBenefitInterestCostPBO" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_CreditBondIndexFundMember" abstract="true" name="CreditBondIndexFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_PSP3WarrantsMember" abstract="true" name="PSP3WarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_DefinedBenefitPlanServiceCostIncludingEarlyOutExpense" abstract="false" name="DefinedBenefitPlanServiceCostIncludingEarlyOutExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_SpecialItemsNetNonOperating" abstract="false" name="SpecialItemsNetNonOperating" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_LeaseReturnCostsAndOtherExpensesMember" abstract="true" name="LeaseReturnCostsAndOtherExpensesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_USTreasuryCARESActLoanMember" abstract="true" name="USTreasuryCARESActLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_A319NonopMember" abstract="true" name="A319NonopMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_QuarterlyPayoutToEmployeeUnderEmployeeIncentivePlanMaximum" abstract="false" name="QuarterlyPayoutToEmployeeUnderEmployeeIncentivePlanMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="alk_CargoServicesMember" abstract="true" name="CargoServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_CorporaterealestateMember" abstract="true" name="CorporaterealestateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_CargoandOtherRevenueMember" abstract="true" name="CargoandOtherRevenueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_FleetTransitionSpecialChargeCategoryAxis" abstract="true" name="FleetTransitionSpecialChargeCategoryAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="alk_PSP1WarrantsMember" abstract="true" name="PSP1WarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_LineOfCreditFacilityAssetRestrictionsUnrestrictedCashAndMarketableSecurities" abstract="false" name="LineOfCreditFacilityAssetRestrictionsUnrestrictedCashAndMarketableSecurities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_PercentofMileageBreakage" abstract="false" name="PercentofMileageBreakage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="alk_CARESActPSPProgramAxis" abstract="true" name="CARESActPSPProgramAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="alk_NumberOfMainlineAircraftParked" abstract="false" name="NumberOfMainlineAircraftParked" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="alk_PassengerTicketsMember" abstract="true" name="PassengerTicketsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodEstimatedFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodEstimatedFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_ConsolidatingAndOtherMember" abstract="true" name="ConsolidatingAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_DeferredTaxAssetsLeasingArrangement" abstract="false" name="DeferredTaxAssetsLeasingArrangement" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_PretaxMarginAdjusted" abstract="false" name="PretaxMarginAdjusted" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="alk_Q400NonopMember" abstract="true" name="Q400NonopMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_July2020EETCMember" abstract="true" name="July2020EETCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_CARESActPSPProgramDomain" abstract="true" name="CARESActPSPProgramDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_PurchaseTypeDomain" abstract="true" name="PurchaseTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_VirginAmericaInc.Member" abstract="true" name="VirginAmericaInc.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_AircraftMember" abstract="true" name="AircraftMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_PayrollSupportProgramGrantRecognized" abstract="false" name="PayrollSupportProgramGrantRecognized" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_TotalUnsecuredTermLoanThroughPSPOfCARESAct" abstract="false" name="TotalUnsecuredTermLoanThroughPSPOfCARESAct" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_TotalMarketableSecuritiesFVMember" abstract="true" name="TotalMarketableSecuritiesFVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_A319Member" abstract="true" name="A319Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_CARESPSP2Member" abstract="true" name="CARESPSP2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_AircraftOptionAndOtherRightsMember" abstract="true" name="AircraftOptionAndOtherRightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_NumberofNonQualifiedDefinedBenefitPlans" abstract="false" name="NumberofNonQualifiedDefinedBenefitPlans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="alk_FuelHedgeContractsNoncurrentMember" abstract="true" name="FuelHedgeContractsNoncurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_PassengerRevenueMember" abstract="true" name="PassengerRevenueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_FleetTransitionImpairmentMember" abstract="true" name="FleetTransitionImpairmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alk_FixedRateEETCPayableDueThrough2027Member" abstract="true" name="FixedRateEETCPayableDueThrough2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alk_AlaskaRegionalMember" abstract="true" name="AlaskaRegionalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_VariableIncentiveCompensation" abstract="false" name="VariableIncentiveCompensation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_AssetImpairmentChargeMember" abstract="true" name="AssetImpairmentChargeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_NotesPayableFairValueDisclosureBeforePurchasePriceAccountingFairValueAdjustment" abstract="false" name="NotesPayableFairValueDisclosureBeforePurchasePriceAccountingFairValueAdjustment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_VariableRateDebtWithInterestRateSwapMember" abstract="true" name="VariableRateDebtWithInterestRateSwapMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_SpecialItemsImpairmentChargesAndOther" abstract="false" name="SpecialItemsImpairmentChargesAndOther" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_DeferredTaxAssetsLeaseholdMaintenance" abstract="false" name="DeferredTaxAssetsLeaseholdMaintenance" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_ContractwithCustomerLiabilityIncreaseFromIssuanceofCredits" abstract="false" name="ContractwithCustomerLiabilityIncreaseFromIssuanceofCredits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_CreditFacility3Member" abstract="true" name="CreditFacility3Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_CARESActPSPTermLoanMember" abstract="true" name="CARESActPSPTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_AirGroupAdjustedMember" abstract="true" name="AirGroupAdjustedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_AircraftMaintenanceandPartsManagementMember" abstract="true" name="AircraftMaintenanceandPartsManagementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_FixedRateNotesPayableDueThrough2029Member" abstract="true" name="FixedRateNotesPayableDueThrough2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_AircraftTransactionStatusDomain" abstract="true" name="AircraftTransactionStatusDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alk_Q400Member" abstract="true" name="Q400Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_RegionalCarrierExpense" abstract="false" name="RegionalCarrierExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_NumberofPartnerAIrlines" abstract="false" name="NumberofPartnerAIrlines" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="alk_WeightedAverageLeaseAssumptionsTableTextBlock" abstract="false" name="WeightedAverageLeaseAssumptionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="alk_DebtPaymentsDomain" abstract="true" name="DebtPaymentsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_LAXRedevelopmentProjectTotalExpectedOutlay" abstract="false" name="LAXRedevelopmentProjectTotalExpectedOutlay" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_AirportFacilitiesMember" abstract="true" name="AirportFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_RevenuefromContractswithCustomerAbstract" abstract="true" name="RevenuefromContractswithCustomerAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="alk_PrefundedTrustAccount" abstract="false" name="PrefundedTrustAccount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_FuelHedgeContractsCurrentMember" abstract="true" name="FuelHedgeContractsCurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_OperatingExpensesExcludingFuel" abstract="false" name="OperatingExpensesExcludingFuel" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_OperatingLeaseConvertedToFinanceLease" abstract="false" name="OperatingLeaseConvertedToFinanceLease" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_AircraftMaintenanceDepositsMember" abstract="true" name="AircraftMaintenanceDepositsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_VariableRateNotesPayableDueThrough2024Member" abstract="true" name="VariableRateNotesPayableDueThrough2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_AircraftMaintenanceDeposits" abstract="false" name="AircraftMaintenanceDeposits" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_OtherAccruedLiabilitiesMember" abstract="true" name="OtherAccruedLiabilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_AirbusMember" abstract="true" name="AirbusMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_SecuredByOtherMember" abstract="true" name="SecuredByOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_PassengerAncillaryServicesMember" abstract="true" name="PassengerAncillaryServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_AOCIEmployeeBenefitPlanMember" abstract="true" name="AOCIEmployeeBenefitPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_A20151BillionRepurchaseProgramMember" abstract="true" name="A20151BillionRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_ProceedsFromIssuanceOfLongTermDebtCashProceedsMember" abstract="true" name="ProceedsFromIssuanceOfLongTermDebtCashProceedsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alk_OperatingLeaseDomain" abstract="true" name="OperatingLeaseDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_OperatingLossAvailableToOffsetPriorYearIncome" abstract="false" name="OperatingLossAvailableToOffsetPriorYearIncome" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alk_AccumulatedOtherComprehensiveIncomeLossBalanceSheetLocationMember" abstract="true" name="AccumulatedOtherComprehensiveIncomeLossBalanceSheetLocationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_OtherStateAmendedReturnRefundsMember" abstract="true" name="OtherStateAmendedReturnRefundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alk_AircraftFirmCommitmentsNewInPeriodMember" abstract="true" name="AircraftFirmCommitmentsNewInPeriodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
