If you are going to book a flight ticket with Avianca and select a seat on your flight then visit the “My Trips” section on the website and can select a seat before to check-in. Apart from it, to help you with Avianca seat selection go to the Avianca Airlines website and select the “My Trips” tab on the booking API. Now you need to fill the passenger\’s last name, reservation number, and then continue. Also, you can log in to your Avianca account to check the Avianca reservations. Now on the seat map, you can find the desired seats on your flight and choose the preferred seats…
https://www.travohelp.com/blog/how-to-upgrade-to-business-class-avianca
