Map of flight path and driving directions from Sioux City to Rockford.
Shortest flight path between Sioux Gateway Airport (SUX) and Chicago Rockford International Airport (RFD).
How far is Rockford from Sioux City?
There are several ways to calculate distances between Sioux City and Rockford. Here are two common methods:Vincenty's formula (applied above)
- 373.551 miles
- 601.172 kilometers
- 324.607 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
- 372.569 miles
- 599.592 kilometers
- 323.754 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
There is no time difference between Sioux City and Rockford.
Sioux City, IA
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 80 kg (176 pounds).
Frequent Flyer Miles Calculator
Sioux City (SUX) → Rockford (RFD).