Calculations with different methods
- 176.930 miles
- 284.741 kilometers
- 153.748 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
- 176.800 miles
- 284.532 kilometers
- 153.635 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance).
Estimated flight time from Roanoke–Blacksburg Regional Airport (ROA) to Washington Dulles International Airport (IAD) is 50 minutes.
Time difference and current local times
There is no time difference between Roanoke and Washington D.C..
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 49 kg (107 pounds).
Roanoke to Washington D.C. flight map.
Frequent Flyer Miles Calculator
Roanoke (ROA) → Washington D.C. (IAD).