Drzewiecki Design Washington National (KDCA) for MSFS

Ronald Reagan Washington National Airport (IATA: DCA, ICAO: KDCA, FAA LID: DCA), is located in Arlington, Virginia, next to the border of Washington, D.C. It is the smaller of two airports operated by the Metropolitan Washington Airports Authority that serve the National Capital Region around Washington. The airport is 5 miles (8.0 km) from downtown Washington D.C.. The airport's original name was Washington National Airport. Congress adopted the present name to honor President Ronald Reagan in 1998. The airport served almost 24 2million passengers in 2019.

Flights into and out of the airport are generally not allowed to exceed 1,250 statute miles (2,010 km) in any direction nonstop, in an effort to send coast-to-coast and overseas traffic to Washington Dulles International Airport, though there are 40 slot exemptions to this rule. Planes are required to take unusually complicated paths to avoid restricted and prohibited airspace above sensitive landmarks, government buildings, and military installations in and around Washington, D.C., and to comply with some of the tightest noise restrictions in the country.

The airport's small size constrains its capacity, but Reagan National currently serves 98 nonstop destinations. Reagan is a hub for American Airlines. The airport has no United States immigration and customs facilities; the only scheduled international flights at the airport are those from airports with U.S. Customs and Border Protection preclearance facilities, which generally encompasses flights from major airports in Canada and from some destinations in the Caribbean. Other international passenger flights to the Washington, D.C., area use Washington Dulles International Airport or Baltimore–Washington International Thurgood Marshall Airport. There are currently five scheduled international routes, which are to cities in Canada, the Bahamas, and Bermuda.

The airport opened June 16, 1941, just before U.S. entry into World War II. Until 1946 nonstop airline flights didn't reach beyond New York, Detroit, Cincinnati, Memphis, Atlanta and Jacksonville. In 1946 Boston, Chicago, Dallas and Miami were added; nonstops reached Denver in 1951 and Los Angeles in 1954. The April 1957 Official Airline Guide shows 316 weekday departures. Jet flights began in April 1966 (727-200s were not allowed until 1970). In 1974 the airport's key carriers were Eastern (20 destinations), United (14 destinations after subsuming Capital) and Allegheny (11 destinations).

Reagan National Airport has some of the strictest noise restrictions in the country. In addition, due to security concerns, the areas surrounding the National Mall and U.S. Naval Observatory in central Washington are prohibited airspace up to 18,000 feet (5,500 m). Due to these restrictions, pilots approaching from the north are generally required to follow the path of the Potomac River and turn just before landing. This approach is known as the River Visual. Similarly, flights taking off to the north are required to climb quickly and turn left. The "River Visual" is only possible with a ceiling of at least 3,500 feet (1,100 m) and visibility of 3 statute miles (4.8 km) or more. There are lights on the Key Bridge, Theodore Roosevelt Bridge, Arlington Memorial Bridge and the George Mason Memorial Bridge to aid pilots following the river.