A llegiant Airlines Cancellation P No matter how well you plan your entire vacation; it all comes down to the olicy last minute, which is choosing the right flight, and having a backup plan will always come in handy if things go wrong. You must be aware of the Allegiant Airlines cancellation policy and a refund throughout the cancellation process. Being prepared ahead of time will save you not only time but also money. Allegiant Airlines Cancellation Policy Allegiant's airline cancellation policy allows passengers to cancel tickets within 24 hours of purchase. Certainly the airline refuses to charge a cancellation fee and the money will be refunded using the original payment method. If you cancel your ticket after 24 hours, the airline will collect a $75 cancellation fee on all charges and will refund the remaining amount to the credit form that you will use to purchase future Allegiant Airline flights. Allegiant Airline will not refund your money or credit if you miss or cancel your flight less than one week before departure.