How To Change A Flight On Frontier Airlines? log in to your account on their website and navigate to the "Manage Booking" or "My Trips" section. Select the flight you want to change and follow the prompts to modify your itinerary. Note that Frontier allows changes up to 24 hours before departure, with possible fees and fare differences. Review terms and conditions carefully before confirming. For assistance, contact Frontier Airlines' customer service.https://www.globalflightcheck.com/how-to-change-a-flight-on-frontier-airlines/