how to change avianca flight? To change your Avianca flight, start by visiting their official website and navigating to the "Manage My Booking" section. Here, you will be prompted to enter your reservation details, including your booking reference or e-ticket number, as well as your last name. Once you have successfully logged in, you will be presented with a range of options to modify your flight. Avianca provides clear instructions and guidance throughout the process, ensuring a seamless experience for its customers.