Allegiant Airlines Refund Policy: Allegiant generally operates on a no-refund policy for most standard tickets, as they are non-refundable and non-transferable. However, passengers who purchase Trip Flex have more flexibility, allowing fee-free changes or cancellations up to one hour before departure. Refunds may be issued in the form of Allegiant credit vouchers rather than cash. Always review the fare rules during booking for specific terms.