Hey people, I am Reba Sage, do you know about the Allegiant Air Cancellation Policy. The cancellation policy of Allegiant Air gives passengers flexibility. If the reservation was made at least seven days in advance, passengers are eligible for a complete refund if they cancel their flight up to 24 hours before departure. Cancellation costs can be incurred after this window. Additionally, Allegiant offers the ability to switch flights or get a coupon for a future trip. See the airline’s terms and conditions for further information, or get help with cancellations by contacting customer care.