Washington Dulles International Airport Airlines' two East Coast hubs, with many nonstop flights to Europe, Asia, and South America. As of June 2015, United handled 61.1% of scheduled air carrier passengers at the airport. American Airlines has a 4.8% market share. Delta Air Lines handles 4.1% of scheduled air carrier passengers. In addition, 29 foreign carriers have service in and out of Washington Dulles. On a typical day, Dulles averages 1,000 to 1,200 flight operations. Dulles served 21.6 million passengers in 2014, a 1.7% decrease over 2013. However, international passenger traffic has increased by 1.6% to nearly 7.1 million during the same time. Additional
Washington Dulles International Airport mezzanine with more room for lines. A new train system, dubbed AeroTrain and developed by Mitsubishi, began in 2010 to transport passengers between the concourses and the main terminal. The system, which uses rubber tires and travels along a fixed underground guideway, is similar to the people mover systems at Singapore Changi Airport, Hartsfield–Jackson Atlanta International Airport, and Denver International Airport. The train is intended to replace the mobile lounges, which many passengers found crowded and inconvenient. The initial phase includes the main terminal station, a permanent Concourse A station, a permanent Concourse B station, a permanent midfield concourse station