Spirit Airlines understands that travel plans can change. Changes in plans or sudden mood changes do not cost anything. Travelers can change or cancel their reservations within 24 hours of booking. If you need to change or cancel your flight, you can call Spirit Airlines Customer Service at 1 (855) 728-3555 or +1 (844) 5591-876 (OTA).
for more information kindly visit -
https://www.spiritairconnect.com/cancellation/what-is-spirit-airlines-cancellation-policy​