To change Fiji flight booking online, visit the airline's official website and log in to your account or call at 1-818-878-8939. Navigate to the "Manage Booking" or "My Trips" section. Select the specific booking you want to modify and follow the on-screen instructions. You may be able to change dates, times, or other details depending on the airline's policies. Additionally, some airlines may charge a fee for modifications, so check the terms and conditions before proceeding. Ensure that you review and confirm the changes before finalizing the process to secure your updated Fiji flight reservation.