How far is Rapid City, SD, from Helena, MT?
The distance between Helena (Helena Regional Airport) and Rapid City (Rapid City Regional Airport) is 469 miles / 755 kilometers / 408 nautical miles.
The driving distance from Helena (HLN) to Rapid City (RAP) is 570 miles / 917 kilometers, and travel time by car is about 10 hours 57 minutes.
Helena Regional Airport – Rapid City Regional Airport
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Distance from Helena to Rapid City
There are several ways to calculate the distance from Helena to Rapid City. Here are two standard methods:
Vincenty's formula (applied above)- 469.087 miles
- 754.922 kilometers
- 407.625 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- 467.991 miles
- 753.158 kilometers
- 406.673 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 Helena to Rapid City?
The estimated flight time from Helena Regional Airport to Rapid City Regional Airport is 1 hour and 23 minutes.
What is the time difference between Helena and Rapid City?
Flight carbon footprint between Helena Regional Airport (HLN) and Rapid City Regional Airport (RAP)
On average, flying from Helena to Rapid City generates about 94 kg of CO2 per passenger, and 94 kilograms equals 207 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Helena to Rapid City
See the map of the shortest flight path between Helena Regional Airport (HLN) and Rapid City Regional Airport (RAP).
Airport information
| Origin | Helena Regional Airport |
|---|---|
| City: | Helena, MT |
| Country: | United States  |
| IATA Code: | HLN |
| ICAO Code: | KHLN |
| Coordinates: | 46°36′24″N, 111°58′58″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 |