How to Change Your Frontier Flight To change your Frontier flight, you typically need to access your booking either through their website or customer service. Navigate to the “Manage Booking” section, where you can modify your flight details like date, time, or destination, depending on availability and fare rules. Ensure to review any applicable fees or fare differences. Provide your new preferences and confirm the changes to secure your updated itinerary. Remember to double-check your new flight details to avoid any inconvenience.