How far is Decatur, IL, from Washington D.C.?
The distance between Washington D.C. (Washington Dulles International Airport) and Decatur (Decatur Airport) is 613 miles / 987 kilometers / 533 nautical miles.
The driving distance from Washington D.C. (IAD) to Decatur (DEC) is 733 miles / 1179 kilometers, and travel time by car is about 14 hours 6 minutes.
Washington Dulles International Airport – Decatur Airport
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Distance from Washington D.C. to Decatur
There are several ways to calculate the distance from Washington D.C. to Decatur. Here are two standard methods:
Vincenty's formula (applied above)- 613.435 miles
- 987.229 kilometers
- 533.061 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- 611.948 miles
- 984.835 kilometers
- 531.768 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 Washington D.C. to Decatur?
The estimated flight time from Washington Dulles International Airport to Decatur Airport is 1 hour and 39 minutes.
What is the time difference between Washington D.C. and Decatur?
Flight carbon footprint between Washington Dulles International Airport (IAD) and Decatur Airport (DEC)
On average, flying from Washington D.C. to Decatur generates about 114 kg of CO2 per passenger, and 114 kilograms equals 252 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Washington D.C. to Decatur
See the map of the shortest flight path between Washington Dulles International Airport (IAD) and Decatur Airport (DEC).
Airport information
| Origin | Washington Dulles International Airport |
|---|---|
| City: | Washington D.C. |
| Country: | United States  |
| IATA Code: | IAD |
| ICAO Code: | KIAD |
| Coordinates: | 38°56′40″N, 77°27′20″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 |