Avianca Cancellation Policy How do I cancel an Avianca flight? Select your chosen cancellation method and cancel your trip for more information on cancellation options. Online Log in to the official website of Avianca Airlines. To complete the passenger identification procedure, enter your username and password in the corresponding fields. Then select Manage Reservations from the dropdown menu. To find the desired trip, enter the confirmation number along with the passenger's last name. Then indicate the reason for the cancellation on the Avianca Airlines flight cancellation form, the reservation number, the name of the passenger and any other relevant information. To submit a form, review it and click Continue. Make sure to read Avianca's cancellation policy before requesting a refund. The airline automatically deducts the Avianca cancellation fee from the total price of the reservation. After successfully submitting your Avianca flight refund form, to your registered email address. You will receive a confirmation email. letter.