Air Miles Calculator logo

Distance between Washington D.C. (IAD) and Washington D.C. (DCA)

Flight distance from Washington D.C. to Washington D.C. (Washington Dulles International Airport – Ronald Reagan Washington National Airport) is 23 miles / 38 kilometers / 20 nautical miles. Estimated flight time is 32 minutes.

Driving distance from Washington D.C. (IAD) to Washington D.C. (DCA) is 29 miles / 46 kilometers and travel time by car is about 42 minutes.

Washington D.C. – Washington D.C.

Distance arrow
23
Miles
Distance arrow
38
Kilometers
Distance arrow
20
Nautical miles

How far is Washington D.C. from Washington D.C.?

There are several ways to calculate distances between Los Angeles and Chicago. Here are two common methods:

Vincenty's formula (applied above)
  • 23.422 miles
  • 37.693 kilometers
  • 20.353 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.

Haversine formula
  • 23.372 miles
  • 37.613 kilometers
  • 20.309 nautical miles

The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).

Flight Duration

Estimated flight time from Washington Dulles International Airport to Ronald Reagan Washington National Airport is 32 minutes.

Time difference

There is no time difference between Washington D.C. and Washington D.C..

Carbon dioxide emissions

On average flying from Washington D.C. to Washington D.C. generates about 28 kg of CO2 per passenger, 28 kilograms is equal to 63 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path and driving directions from Washington D.C. to Washington D.C.

Shortest flight path between Washington Dulles International Airport (IAD) and Ronald Reagan Washington National Airport (DCA).

Airport information

Origin Washington Dulles International Airport
City: Washington D.C.
Country: United States Flag of United States
IATA Code: IAD
ICAO Code: KIAD
Coordinates: 38°56′40″N, 77°27′20″W
Destination Ronald Reagan Washington National Airport
City: Washington D.C.
Country: United States Flag of United States
IATA Code: DCA
ICAO Code: KDCA
Coordinates: 38°51′7″N, 77°2′15″W