Calculations with different methods
- 1207.698 miles
- 1943.602 kilometers
- 1049.461 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
- 1206.475 miles
- 1941.634 kilometers
- 1048.398 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance).
Estimated flight time from George Bush Intercontinental Airport (IAH) to Ronald Reagan Washington National Airport (DCA) is 2 hours 47 minutes.
Time difference and current local times
The time difference between Houston and Washington D.C. is 1 hour. Washington D.C. is 1 hour ahead of Houston.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 158 kg (349 pounds).
Houston to Washington D.C. flight map.
Frequent Flyer Miles Calculator
Houston (IAH) → Washington D.C. (DCA).