Avianca Airlines IAD Terminal +1-888-839-0502 I thoroughly enjoyed my visit to the Avianca Airlines IAD Terminal. Check-in was seamless, with pleasant people who got me through quickly. Security lines progressed well, and I did not have to stand around long. The terminal was clean, wide, and provided ample seating options. I loved the charging posts and the numerous food options to choose from. Boarding went smoothly, and everything was seemless. Overall, flying with Avianca from Washington Dulles was easy and pleasant. I would certainly fly from this terminal again. visit us : https://www.terminalsme.com/avianca-airlines/avianca-airlines-iad-terminal-dulles-international-airport/