Frontier will cancel any purchased ticket and provide a full refund without penalty up to 24 hours after purchase (Know more +( +1~855~738_3598 (USA) and +1~855~738_3598 (CANADA)) . Beyond 24 hours of purchase, a non-refundable ticket offers no options if an unexpected medical emergency or other unforeseen circumstance forces you to cancel your trip or modify your travel plans.