How far is Washington D.C. from Decatur, IL?
The distance between Decatur (Decatur Airport) and Washington D.C. (Washington Dulles International Airport) is 613 miles / 987 kilometers / 533 nautical miles.
The driving distance from Decatur (DEC) to Washington D.C. (IAD) is 731 miles / 1177 kilometers, and travel time by car is about 14 hours 4 minutes.
Decatur Airport – Washington Dulles International Airport
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Distance from Decatur to Washington D.C.
There are several ways to calculate the distance from Decatur to Washington D.C.. 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 Decatur to Washington D.C.?
The estimated flight time from Decatur Airport to Washington Dulles International Airport is 1 hour and 39 minutes.
What is the time difference between Decatur and Washington D.C.?
Flight carbon footprint between Decatur Airport (DEC) and Washington Dulles International Airport (IAD)
On average, flying from Decatur to Washington D.C. 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 Decatur to Washington D.C.
See the map of the shortest flight path between Decatur Airport (DEC) and Washington Dulles International Airport (IAD).
Airport information
| Origin | Decatur Airport |
|---|---|
| City: | Decatur, IL |
| Country: | United States  |
| IATA Code: | DEC |
| ICAO Code: | KDEC |
| Coordinates: | 39°50′4″N, 88°51′56″W |
| Destination | 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 |