Under the Allegiant Airlines cancellation policy, you can cancel your reservation hassle-free. If you cancel your ticket within the first day of booking, the airline will not charge you a cancellation fee. However, if you cancel your booking the next day after making a reservation, you will have to pay a cancellation/refund fee as per the cancellation policy. The cancellation fee will be based on your reservation type and when you cancel your ticket. You can cancel your ticket by using the online or offline services.
https://flightcancellationpoli....cy.com/allegiant-air