I had to cancel a Spirit flight to Vegas earlier this year, and their policy was pretty straightforward. If you cancel within 24 hours of booking (and at least a week before travel), you get a full refund. Outside that window, they usually give you a credit minus a fee. In my case, I needed to move my flight instead of canceling, so I called (844) 734-0813. They explained the change fees, helped me switch to a later date, and applied my payment toward the new ticket. Honestly, it was way smoother than trying to handle it online. So the policy allows changes or cancellations, but the faster you act, the better — and calling that number was the quickest way to get it done.