If you need to Change Frontier Flight,Within 24 hours of booking a Frontier flight, you can modify the date, time, or destination without paying any extra fees. This applies to all ticket types. If the new flight costs more, you’ll need to pay the difference. Remember, this 24-hour flexible booking option is only for bookings made directly with Frontier. If you encounter any issues or have specific queries regarding your flight change, can read this blog by Airlines pet policy and can also contact the Frontier Airlines customer support.