# Distance between Chicago, IL (ORD) and Casper, WY (CPR)

Flight distance from Chicago to Casper (Chicago O'Hare International Airport – Casper–Natrona County International Airport) is 949 miles / 1527 kilometers / 825 nautical miles. Estimated flight time is 2 hours 17 minutes.

Driving distance from Chicago (ORD) to Casper (CPR) is 1143 miles / 1839 kilometers and travel time by car is about 18 hours 48 minutes.

## Map of flight path and driving directions from Chicago to Casper.

Shortest flight path between Chicago O'Hare International Airport (ORD) and Casper–Natrona County International Airport (CPR).

## How far is Casper from Chicago?

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

Vincenty's formula (applied above)
• 949.022 miles
• 1527.304 kilometers
• 824.678 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
• 946.532 miles
• 1523.295 kilometers
• 822.514 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 Chicago O'Hare International Airport
City: Chicago, IL
Country: United States
IATA Code: ORD
ICAO Code: KORD
Coordinates: 41°58′42″N, 87°54′17″W

B 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

## Time difference and current local times

The time difference between Chicago and Casper is 1 hour. Casper is 1 hour behind Chicago.

CDT

MDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 147 kg (325 pounds).

## Frequent Flyer Miles Calculator

Chicago (ORD) → Casper (CPR).

Distance:
949
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
949

Round trip?