Air Miles Calculator

Distance between Casper, WY (CPR) and Rockford, IL (RFD)

Flight distance from Casper to Rockford (Casper–Natrona County International Airport – Chicago Rockford International Airport) is 886 miles / 1426 kilometers / 770 nautical miles. Estimated flight time is 2 hours 10 minutes.

Driving distance from Casper (CPR) to Rockford (RFD) is 1092 miles / 1757 kilometers and travel time by car is about 18 hours 0 minutes.

Map of flight path and driving directions from Casper to Rockford.

Shortest flight path between Casper–Natrona County International Airport (CPR) and Chicago Rockford International Airport (RFD).

How far is Rockford from Casper?

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

Vincenty's formula (applied above)
  • 886.085 miles
  • 1426.015 kilometers
  • 769.986 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
  • 883.748 miles
  • 1422.255 kilometers
  • 767.956 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 Casper–Natrona County International Airport
City: Casper, WY
Country: United States Flag of United States
IATA Code: CPR
ICAO Code: KCPR
Coordinates: 42°54′28″N, 106°27′50″W

B Chicago Rockford International Airport
City: Rockford, IL
Country: United States Flag of 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 Casper and Rockford is 1 hour. Rockford is 1 hour ahead of Casper.

Time Difference

Casper, WY

 MST

Rockford, IL

 CST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 142 kg (314 pounds).

Frequent Flyer Miles Calculator

Casper (CPR) → Rockford (RFD).

Distance:
886
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
886

Round trip?