Terminal Information
Washington Dulles International Airport (IAD) has one main terminal and airside concourses parallel to them. The walkway and the Aerotrain connect them wonderfully. The terminal is split across two levels. Departures are taken care of on the upper level, and arrivals are on the lower level.
You will find five concourses - A, B, C, D, and Z - inside the security area. This fine distinction makes the overall operations of the airport pretty smooth. Several restaurants and lounges, combined with the luxurious facilities make it one of the best airports in the world. India to Washington flights regularly arrive at this airport with IndiGo.