Air Miles Calculator

Distance between Oklahoma City, OK (OKC) and Decatur, IL (DEC)

Flight distance from Oklahoma City to Decatur (Will Rogers World Airport – Decatur Airport) is 568 miles / 915 kilometers / 494 nautical miles. Estimated flight time is 1 hour 34 minutes.

Driving distance from Oklahoma City (OKC) to Decatur (DEC) is 646 miles / 1040 kilometers and travel time by car is about 11 hours 9 minutes.

Map of flight path and driving directions from Oklahoma City to Decatur.

Shortest flight path between Will Rogers World Airport (OKC) and Decatur Airport (DEC).

How far is Decatur from Oklahoma City?

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

Vincenty's formula (applied above)
  • 568.319 miles
  • 914.622 kilometers
  • 493.856 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
  • 567.674 miles
  • 913.582 kilometers
  • 493.295 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 Will Rogers World Airport
City: Oklahoma City, OK
Country: United States Flag of United States
IATA Code: OKC
ICAO Code: KOKC
Coordinates: 35°23′35″N, 97°36′2″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

There is no time difference between Oklahoma City and Decatur.

Time Difference

Oklahoma City, OK

 CST

Decatur, IL

 CST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 109 kg (239 pounds).

Frequent Flyer Miles Calculator

Oklahoma City (OKC) → Decatur (DEC).

Distance:
568
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
568

Round trip?