The biggest airline in Latin America is Avianca Airlines. Both domestic and foreign flights are available in a large variety. With their streamlined policies, it goes to great measures to make sure your trip is as enjoyable as possible. The Avianca Flight Change Policy is the same. If you need to modify your flight, all you have to do is let them know before the scheduled departure date. For an additional price that varies depending on the season, they will let you know what needs to be done for the new arrangements.