Air Miles Calculator

Distance between Houston, TX (IAH) and Washington D.C. (IAD)

Distance from George Bush Intercontinental Airport to Washington Dulles International Airport is 1190 miles / 1915 kilometers / 1034 nautical miles.

Calculations with different methods

Vincenty's formula (applied above)
  • 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).

Flight duration

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.

Time Difference

Houston
Washington D.C.

Houston, TX

 CST

Washington D.C.

 EST

Airport information


A George Bush Intercontinental Airport
City: Houston, TX
Country: United States Flag of United States
IATA Code: IAH
ICAO Code: KIAH
Coordinates: 29°59′3″N, 95°20′29″W

B 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

Map

Flight map from Houston to Washington D.C..

Frequent Flyer Miles Calculator

Houston (IAH) → Washington D.C. (IAD).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
1190
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1190

Round trip?