Transportation in Washington, D.C. via Washington Metro. The airport is conveniently located near to the downtown area; however, it has somewhat restricted flights to airports within the United States because of noise and security concerns. Most major international flights arrive and depart from Washington Dulles International Airport , located west of the city in Fairfax and Loudoun counties in Virginia. Dulles is the second busiest international gateway on the Eastern Seaboard. It is the Washington region's second busiest airport in terms of passengers served. Dulles offers service from several low-cost carriers including JetBlue, although the low-cost selection decreased greatly when Independence Air (which was
Mexico City International Airport are United Airlines, American Airlines, Delta Air Lines and Avianca Holdings. Aeroméxico/Aeroméxico Connect operates the most departures from the airport followed by Interjet, Volaris, and Aeromar. Aeroméxico also operates to the most destinations followed by Interjet. This table lists passengers flights served with a nonstop or direct flight with no change of aircraft carrying passengers originating in Mexico City according to the airlines' published schedules, unless otherwise noted. In addition to the scheduled airlines above, Mexico City airport is used by some further airlines for chartered flights including: As of January 2018, Mexico City airport is served by 19 cargo