Frontier Airlines tickets are generally non-refundable, but you can receive a full refund if you cancel within 24 hours of your initial reservation, provided it's at least 7 days (168 hours) before departure. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) You are also eligible for a refund for flights that are canceled or significantly delayed (more than 3 hours for domestic or 6 hours for international flights) by the airline, provided you did not take the rebooked flight or accept a travel credit. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK)