Spirit Airlines, like other airlines, has a cancellation policy in place that outlines the rules and fees associated with cancelling a flight reservation. It's important to note that airline policies can change, so it's always a good idea to check the most up-to-date information on the Spirit Airlines website or contact their customer service for specific details. As of my last knowledge update in September 2021, here is a general overview of Spirit Airlines' cancellation policy:

• 24-Hour Risk-Free Cancellation: Spirit Airlines Cancellation Policy typically allows passengers to cancel a reservation within 24 hours of booking without incurring any cancellation fees, as long as the booking was made at least seven days before the flight's departure. This is in accordance with U.S. Department of Transportation regulations.
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• Cancellation Fees: If you need to cancel your flight after the 24-hour window or if your booking does not qualify for the 24-hour risk-free cancellation, you will likely incur a cancellation fee. The amount of the fee can vary depending on various factors, including when you cancel and the fare type.