Map of flight path and driving directions from Roanoke to Chicago.
Shortest flight path between Roanoke–Blacksburg Regional Airport (ROA) and Chicago O'Hare International Airport (ORD).
How far is Chicago from Roanoke?
There are several ways to calculate distances between Roanoke and Chicago. 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 Roanoke and Chicago is 1 hour. Chicago is 1 hour behind Roanoke.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 103 kg (227 pounds).
Frequent Flyer Miles Calculator
Roanoke (ROA) → Chicago (ORD).