How far is Decatur, IL, from Washington D.C.?
The distance between Washington D.C. (Ronald Reagan Washington National Airport) and Decatur (Decatur Airport) is 637 miles / 1025 kilometers / 553 nautical miles.
The driving distance from Washington D.C. (DCA) to Decatur (DEC) is 741 miles / 1192 kilometers, and travel time by car is about 14 hours 14 minutes.
Ronald Reagan Washington National 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)- 636.720 miles
- 1024.702 kilometers
- 553.295 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- 635.182 miles
- 1022.226 kilometers
- 551.958 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 Ronald Reagan Washington National Airport to Decatur Airport is 1 hour and 42 minutes.
What is the time difference between Washington D.C. and Decatur?
Flight carbon footprint between Ronald Reagan Washington National Airport (DCA) and Decatur Airport (DEC)
On average, flying from Washington D.C. to Decatur generates about 117 kg of CO2 per passenger, and 117 kilograms equals 259 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 Ronald Reagan Washington National Airport (DCA) and Decatur Airport (DEC).
Airport information
| Origin | Ronald Reagan Washington National Airport |
|---|---|
| City: | Washington D.C. |
| Country: | United States  |
| IATA Code: | DCA |
| ICAO Code: | KDCA |
| Coordinates: | 38°51′7″N, 77°2′15″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 |