# Distance between Rock Springs, WY (RKS) and Rockford, IL (RFD)

Flight distance from Rock Springs to Rockford (Southwest Wyoming Regional Airport – Chicago Rockford International Airport) is 1028 miles / 1655 kilometers / 893 nautical miles. Estimated flight time is 2 hours 26 minutes.

Driving distance from Rock Springs (RKS) to Rockford (RFD) is 1158 miles / 1864 kilometers and travel time by car is about 19 hours 0 minutes.

## Map of flight path and driving directions from Rock Springs to Rockford.

Shortest flight path between Southwest Wyoming Regional Airport (RKS) and Chicago Rockford International Airport (RFD).

## How far is Rockford from Rock Springs?

There are several ways to calculate distances between Rock Springs and Rockford. Here are two common methods:

Vincenty's formula (applied above)
• 1028.139 miles
• 1654.630 kilometers
• 893.429 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
• 1025.462 miles
• 1650.322 kilometers
• 891.103 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).

## Airport information

A Southwest Wyoming Regional Airport
City: Rock Springs, WY
Country: United States
IATA Code: RKS
ICAO Code: KRKS
Coordinates: 41°35′39″N, 109°3′54″W

B Chicago Rockford International Airport
City: Rockford, IL
Country: United States
IATA Code: RFD
ICAO Code: KRFD
Coordinates: 42°11′43″N, 89°5′49″W

## Time difference and current local times

The time difference between Rock Springs and Rockford is 1 hour. Rockford is 1 hour ahead of Rock Springs.

MDT

CDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 153 kg (336 pounds).

## Frequent Flyer Miles Calculator

Rock Springs (RKS) → Rockford (RFD).

Distance:
1028
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
1028

Round trip?