The diagram shows this better than I can explain it. At a gage height of 1 foot, our stream has the amount of water (flow) represented by the blue area. Let's say it rains and the water rises to 2 feet. The additional flow is represented by the green area.
Closest Airport to Washington, D. C., DC. The closest airport to Washington, D. C. is Ronald Reagan Washington National Airport (DCA). Distance from Ronald Reagan Washington National Airport to Washington, D. C., DC is 4,8 kilometers (3,0 miles).
General DCA Airport Information. Fly in or out of the nationâs capital through Ronald Reagan Washington National Airport. Also referred to as DCA airport, it is located in Arlington County, Virginia, which is just south of Washington, D.C. The majority of flights flying through the DCA airport terminals are domestic inbound and outbound flights.