To cancel a Spirit Airlines flight, go to the Spirit website or app and open “My Trips” using your confirmation code and last name. From there, you can cancel the booking. If you cancel within 24 hours of booking, you’re usually eligible for a full refund. After that, most fares aren’t refundable, but you’ll typically receive travel credits for future use, minus any applicable fees. If the online option doesn’t work or you have questions, a Spirit agent can help explain your options.