Air Miles Calculator

Distance between Chicago, IL (ORD) and Decatur, IL (DEC)

Flight distance from Chicago to Decatur (Chicago O'Hare International Airport – Decatur Airport) is 156 miles / 251 kilometers / 136 nautical miles. Estimated flight time is 47 minutes.

Driving distance from Chicago (ORD) to Decatur (DEC) is 188 miles / 303 kilometers and travel time by car is about 3 hours 28 minutes.

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

Shortest flight path between Chicago O'Hare International Airport (ORD) and Decatur Airport (DEC).

How far is Decatur from Chicago?

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

Vincenty's formula (applied above)
  • 156.262 miles
  • 251.479 kilometers
  • 135.788 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
  • 156.401 miles
  • 251.703 kilometers
  • 135.908 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 Flag of United States
IATA Code: ORD
ICAO Code: KORD
Coordinates: 41°58′42″N, 87°54′17″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 Chicago and Decatur.

Time Difference

Chicago, IL

 CDT

Decatur, IL

 CDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 48 kg (106 pounds).

Frequent Flyer Miles Calculator

Chicago (ORD) → Decatur (DEC).

Distance:
156
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
156

Round trip?