Map of flight path and driving directions from Chicago to Roanoke.
Shortest flight path between Chicago O'Hare International Airport (ORD) and Roanoke–Blacksburg Regional Airport (ROA).
How far is Roanoke from Chicago?
There are several ways to calculate distances between Chicago and Roanoke. Here are two common methods:Vincenty's formula (applied above)
- 530.522 miles
- 853.793 kilometers
- 461.011 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
- 529.982 miles
- 852.923 kilometers
- 460.542 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).
Time difference and current local times
The time difference between Chicago and Roanoke is 1 hour. Roanoke is 1 hour ahead of Chicago.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 103 kg (227 pounds).
Frequent Flyer Miles Calculator
Chicago (ORD) → Roanoke (ROA).