The ticket is not valid and refunds for the ticket purchased will be given in accordance with fair rules. If the ticket is non-refundable, it can be used to pay for a new ticket and must be booked in the same name as the passenger. Partially used tickets may or may not be refunded according to the ticket's fare rules. Some tickets may or may not be refunded in accordance with the fare rules that apply to tickets purchased.

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Allegiant Airlines Cancellation Policy | Refund Policy, Cancellation Fee
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Allegiant Airlines Cancellation Policy | Refund Policy, Cancellation Fee

If you decided to cancel your existing reservation, you should be aware of the Allegiant Airlines Cancellation Policy and fares. Long after cancellation, Allegiant Airlines' refund policy is also the term to describe.