Spirit Airlines' customer support is open 24 hours a day, 7 days a week, so customers can contact them at any time if they want to gamble on their flight, such as changing the schedule or destination. Our customer support department will cancel your flight immediately, and a refund will be processed within 3-4 business days. Spirit Airlines  Flight cancellation notice from Spirit Airlines will be sent to the e-mail address supplied at the time of reservation almost immediately. An hour before the scheduled departure, customers can make modifications to their flight.
https://wondercustomer.com/spirit-airlines-flight-cancellation/