Airlines by market share at Washington Dulles: United leads

Washington Dulles International Airport, located 26 miles west of Washington D.C., is a significant international gateway on the East Coast. The airport handles over 90% of the international traffic originating from the Baltimore-Washington area and offers nonstop service to more than 135 global destinations.

United Airlines is the largest carrier at Washington Dulles, holding a market share of 70.42%. United has played a crucial role in developing the airport's international network since establishing a hub there in 1986. The airline operates dozens of daily flights from Concourses C and D, which are exclusively used by United. "The carrier has solidified itself as the market leader in Washington D.C.," maintaining its market share over the last decade.

Delta Air Lines holds the second-largest market share at 5.12%. Although historically a minor player at Dulles, Delta connects the airport to major hubs across the U.S., including Atlanta, Salt Lake City, and Seattle/Tacoma. Delta operates from Concourses A and B but does not have its own lounge at Dulles.