Air Miles Calculator

Distance between Casper, WY (CPR) and Decatur, IL (DEC)

Flight distance from Casper to Decatur (Casper–Natrona County International Airport – Decatur Airport) is 937 miles / 1508 kilometers / 814 nautical miles. Estimated flight time is 2 hours 16 minutes.

Driving distance from Casper (CPR) to Decatur (DEC) is 1103 miles / 1775 kilometers and travel time by car is about 18 hours 26 minutes.

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

Shortest flight path between Casper–Natrona County International Airport (CPR) and Decatur Airport (DEC).

How far is Decatur from Casper?

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

Vincenty's formula (applied above)
  • 937.212 miles
  • 1508.297 kilometers
  • 814.415 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
  • 934.977 miles
  • 1504.700 kilometers
  • 812.473 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 Decatur Airport
City: Decatur, IL
Country: United States Flag of United States
IATA Code: DEC
ICAO Code: KDEC
Coordinates: 39°50′4″N, 88°51′56″W

Time difference and current local times

The time difference between Casper and Decatur is 1 hour. Decatur is 1 hour ahead of Casper.

Time Difference

Casper, WY

 MST

Decatur, IL

 CST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 146 kg (323 pounds).

Frequent Flyer Miles Calculator

Casper (CPR) → Decatur (DEC).

Distance:
937
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
937

Round trip?