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SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 ( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 Or □ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from FORM 10 - K to Commission File Number 001-33166 allegiant Allegiant Travel Company ( Exact Name of Registrant as Specified in Its Charter ) Nevada ( State or Other Jurisdiction of Incorporation or Organization ) 1201 North Town Center Drive Las Vegas , Nevada ( Address of Principal Executive Offices ) Title of each class Common Stock , $ 0.001 Par Value 20-4745737 ( IRS Employer Identification No. ) Registrant's Telephone Number , Including Area Code : ( 702 ) 851-7300 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ALGT Securities registered pursuant to Section 12 ( g ) of the Act : None 1 89144 ( Zip Code ) Name of each exchange on which registered Nasdaq Global Select Market Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes > No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No