How far is Rapid City, SD, from Decatur, IL?
The distance between Decatur (Decatur Airport) and Rapid City (Rapid City Regional Airport) is 786 miles / 1264 kilometers / 683 nautical miles.
The driving distance from Decatur (DEC) to Rapid City (RAP) is 977 miles / 1573 kilometers, and travel time by car is about 17 hours 8 minutes.
Decatur Airport – Rapid City Regional Airport
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Distance from Decatur to Rapid City
There are several ways to calculate the distance from Decatur to Rapid City. Here are two standard methods:
Vincenty's formula (applied above)- 785.596 miles
- 1264.294 kilometers
- 682.664 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- 783.945 miles
- 1261.637 kilometers
- 681.229 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 Rapid City?
The estimated flight time from Decatur Airport to Rapid City Regional Airport is 1 hour and 59 minutes.
What is the time difference between Decatur and Rapid City?
The time difference between Decatur and Rapid City is 1 hour. Rapid City is 1 hour behind Decatur.
Flight carbon footprint between Decatur Airport (DEC) and Rapid City Regional Airport (RAP)
On average, flying from Decatur to Rapid City generates about 133 kg of CO2 per passenger, and 133 kilograms equals 294 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 Rapid City
See the map of the shortest flight path between Decatur Airport (DEC) and Rapid City Regional Airport (RAP).
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 | Rapid City Regional Airport |
|---|---|
| City: | Rapid City, SD |
| Country: | United States |
| IATA Code: | RAP |
| ICAO Code: | KRAP |
| Coordinates: | 44°2′43″N, 103°3′25″W |