At Allegiant Airlines, it is very easy to cancel a flight and get a refund. They have kept in mind that their passengers might have to change a flight ticket due to any emergency and that is why they have prepared a perfect Allegiant Airlines Cancellation Policy. Under this policy, if you have purchased a refundable ticket, then you can cancel your ticket without any additional charge. but if you have bought a non-refundable ticket, then you need to pay an additional charge on the cancellation. Also, if you cancel your booking within 24 hours of booking, you can claim a full refund under their 24-hour refund policy.