Calculations with different methods
- 1018.032 miles
- 1638.363 kilometers
- 884.645 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
- 1017.021 miles
- 1636.737 kilometers
- 883.767 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 Roanoke–Blacksburg Regional Airport (ROA) is 2 hours 25 minutes.
Time difference and current local times
The time difference between Houston and Roanoke is 1 hour. Roanoke is 1 hour ahead of Houston.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 142 kg (312 pounds).
Houston to Roanoke flight map.
Frequent Flyer Miles Calculator
Houston (IAH) → Roanoke (ROA).