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Houston (IAH) - Washington D.C. (IAD)
Calculations with different methods
- 1190.057 miles
- 1915.211 kilometers
- 1034.131 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
- 1188.919 miles
- 1913.380 kilometers
- 1033.143 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 Washington Dulles International Airport (IAD) is 2 hours 45 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.
Flight map from Houston to Washington D.C..
Frequent Flyer Miles Calculator
Houston (IAH) → Washington D.C. (IAD).