Is it simple to rebook a flight with Sipit airlines? Since everyone's circumstances and plans are unique and prone to change, it is not unusual for travellers to seek a Spirit Flight Change. Flight changes are made easy by Spirit Airlines in a number of ways. Travelers have three options for requesting this service: over the phone with the customer support hotline, in person at the airline's office, or even online using the official website approach. Within 24 hours of making a reservation, changing your flight is free of charge.