Spirit Airlines flight Change Policy offers flexibility for flight changes, though fees apply based on the fare type and timing. You can modify your booking online or through customer service, with fees generally higher the closer you are to departure. Changes need to be made at least 24 hours in advance, and if you switch to a more expensive flight, you’ll be responsible for the fare difference. Refunds are typically only issued when the airline cancels the flight. Always check the specific terms when booking, as the details can vary.