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).
There are three major airports in the Washington DC area. Washington Dulles International Airport (IAD), Baltimore/Washington International Airport (BWI) and Ronald Reagan National Airport (DCA). We suggest that you travel comfortably and with clothing that will not make it difficult for you to get through security.