I'm aRonald Reagan Washington National Airport (IATA: DCA, ICAO: KDCA, FAA LID: DCA) is a major airport 3 miles (5 km) south of downtown Washington, D.C., in Arlington County, Virginia, United States.[1] It is the nearest commercial airport to the capital and serves the Baltimore-Washington Metropolitan Area. For decades it was called Washington National Airport; it was renamed in 1998 to honor President Ronald Reagan.[4][5] TheMetropolitan Washington Airports Authority (MWAA) operates the airport with close oversight by the federal government due to its proximity to the national capital.Reagan National is a hub for American Airlines, which is Reagan National's largest carrier. American Airlines also has near-hourly air shuttle flights to New York LaGuardia Airport and Logan International Airport in Boston. Delta Air Lines also operates near-hourly air shuttle flights to New York LaGuardia Airport, which are all operated byDelta Shuttle.Other than the current 40 slot exemptions, flights into and out of the airport are not allowed to exceed 1,250 statute miles (2,000 km) in any direction nonstop, in an effort to send air traffic to the larger but more distantWashington Dulles International Airport. In the 12 months ending March 2015, the airport served 21,195,775 passengers.[6]Reagan National only has United States immigration and customs facilities for corporate jet traffic; the only international flights allowed to land at the airport are those from airports with U.S. Customs and Border Protection preclearance facilities. Other international passenger flights must use Washington Dulles International Airport or Baltimore/Washington International Airport.