content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001964529</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001362468</issuerCik>
        <issuerName>Allegiant Travel CO</issuerName>
        <secFileNumber>001-33166</secFileNumber>
        <issuerAddress>
          <com:street1>1201 N. TOWN CENTER DRIVE</com:street1>
          <com:city>LAS VEGAS</com:city>
          <com:stateOrCountry>NV</com:stateOrCountry>
          <com:zipCode>89144</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>702-851-7300</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Wilper Keny Frank</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Brokerage Services LLC</name>
          <address>
            <com:street1>900 Salem Street</com:street1>
            <com:city>Smithfield</com:city>
            <com:stateOrCountry>RI</com:stateOrCountry>
            <com:zipCode>02917</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>403</noOfUnitsSold>
        <aggregateMarketValue>15785.51</aggregateMarketValue>
        <noOfUnitsOutstanding>18296800</noOfUnitsOutstanding>
        <approxSaleDate>08/19/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>08/04/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>403</amountOfSecuritiesAcquired>
        <paymentDate>08/04/2024</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Keny F. Wilper</name>
          <address>
            <com:street1>1201 North Town Center Drive</com:street1>
            <com:city>Las Vegas</com:city>
            <com:stateOrCountry>NV</com:stateOrCountry>
            <com:zipCode>89144</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>05/30/2024</saleDate>
        <amountOfSecuritiesSold>1000</amountOfSecuritiesSold>
        <grossProceeds>51000.00</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>08/19/2024</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>05/20/2024</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Keny F. Wilper</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
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text: 144
  0001964529
  XXXXXXXX
  LIVE
  0001362468
  Allegiant Travel CO
  001-33166
  1201 N. TOWN CENTER DRIVE
  LAS VEGAS
  NV
  89144
  702-851-7300
  Wilper Keny Frank
  Officer
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  403
  15785.51
  18296800
  08/19/2024
  NASDAQ
  Common
  08/04/2024
  Restricted Stock Vesting
  Issuer
  N
  403
  08/04/2024
  Compensation
  N
  Keny F. Wilper
  1201 North Town Center Drive
  Las Vegas
  NV
  89144
  Common
  05/30/2024
  1000
  51000.00
  08/19/2024
  05/20/2024
  /s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Keny F. Wilper