How far is Casper, WY, from Rockford, IL?
The distance between Rockford (Chicago Rockford International Airport) and Casper (Casper–Natrona County International Airport) is 886 miles / 1426 kilometers / 770 nautical miles.
The driving distance from Rockford (RFD) to Casper (CPR) is 959 miles / 1544 kilometers, and travel time by car is about 19 hours 6 minutes.
Chicago Rockford International Airport – Casper–Natrona County International Airport
Search flights
Distance from Rockford to Casper
There are several ways to calculate the distance from Rockford to Casper. Here are two standard 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 planet.
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).
How long does it take to fly from Rockford to Casper?
The estimated flight time from Chicago Rockford International Airport to Casper–Natrona County International Airport is 2 hours and 10 minutes.
What is the time difference between Rockford and Casper?
The time difference between Rockford and Casper is 1 hour. Casper is 1 hour behind Rockford.
Flight carbon footprint between Chicago Rockford International Airport (RFD) and Casper–Natrona County International Airport (CPR)
On average, flying from Rockford to Casper generates about 142 kg of CO2 per passenger, and 142 kilograms equals 314 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Rockford to Casper
See the map of the shortest flight path between Chicago Rockford International Airport (RFD) and Casper–Natrona County International Airport (CPR).
Airport information
| Origin | 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 |
| Destination | Casper–Natrona County International Airport |
|---|---|
| City: | Casper, WY |
| Country: | United States |
| IATA Code: | CPR |
| ICAO Code: | KCPR |
| Coordinates: | 42°54′28″N, 106°27′50″W |