How far is Decatur, IL, from Chicago, IL?
The distance between Chicago (Chicago O'Hare International Airport) and Decatur (Decatur Airport) is 156 miles / 251 kilometers / 136 nautical miles.
The driving distance from Chicago (ORD) to Decatur (DEC) is 189 miles / 304 kilometers, and travel time by car is about 3 hours 43 minutes.
Chicago O'Hare International Airport – Decatur Airport
Search flights
Distance from Chicago to Decatur
There are several ways to calculate the distance from Chicago to Decatur. Here are two standard 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 planet.
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).
How long does it take to fly from Chicago to Decatur?
The estimated flight time from Chicago O'Hare International Airport to Decatur Airport is 47 minutes.
What is the time difference between Chicago and Decatur?
Flight carbon footprint between Chicago O'Hare International Airport (ORD) and Decatur Airport (DEC)
On average, flying from Chicago to Decatur generates about 48 kg of CO2 per passenger, and 48 kilograms equals 106 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Chicago to Decatur
See the map of the shortest flight path between Chicago O'Hare International Airport (ORD) and Decatur Airport (DEC).
Airport information
| Origin | 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 |
| Destination | Decatur Airport |
|---|---|
| City: | Decatur, IL |
| Country: | United States |
| IATA Code: | DEC |
| ICAO Code: | KDEC |
| Coordinates: | 39°50′4″N, 88°51′56″W |