How far is Rockford from Chicago?
There are several ways to calculate distances between Chicago and Rockford. Here are two common methods:Vincenty's formula (applied above)
- 63.101 miles
- 101.552 kilometers
- 54.834 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
- 62.949 miles
- 101.307 kilometers
- 54.701 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).
Estimated flight time from O'Hare International Airport (ORD) to Chicago Rockford International Airport (RFD) is 37 minutes.
Time difference and current local times
There is no time difference between Chicago and Rockford.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 27 kg (59 pounds).
Chicago to Rockford flight map.
Frequent Flyer Miles Calculator
Chicago (ORD) → Rockford (RFD).