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How far is Rockford, IL, from Casper, WY?

The distance between Casper (Casper–Natrona County International Airport) and Rockford (Chicago Rockford International Airport) is 886 miles / 1426 kilometers / 770 nautical miles.

The driving distance from Casper (CPR) to Rockford (RFD) is 959 miles / 1544 kilometers, and travel time by car is about 19 hours 1 minutes.

Casper–Natrona County International Airport – Chicago Rockford International Airport

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886
Miles
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1426
Kilometers
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770
Nautical miles

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Distance from Casper to Rockford

There are several ways to calculate the distance from Casper to Rockford. 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 Casper to Rockford?

The estimated flight time from Casper–Natrona County International Airport to Chicago Rockford International Airport is 2 hours and 10 minutes.

Flight carbon footprint between Casper–Natrona County International Airport (CPR) and Chicago Rockford International Airport (RFD)

On average, flying from Casper to Rockford 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 Casper to Rockford

See the map of the shortest flight path between Casper–Natrona County International Airport (CPR) and Chicago Rockford International Airport (RFD).

Airport information

Origin 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
Destination 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