It might be difficult to cancel a flight that has already been booked. Refunds, cancellation fees, and a slew of other things must all be considered. With Allegiant Airlines, however, cancelling a flight is as simple as dialling a phone number. You may contact an airline customer service person by dialling the Allegiant airline customer service phone number. The professional will assist you throughout the procedure and obtain a refund for you. All you have to do is provide them with your flight information, which they will keep safe, and they will take care of the rest. You may also reach out to our staff at any time, and we will assist you in finding the best solution.