How far is Helena, MT, from Rapid City, SD?
The distance between Rapid City (Rapid City Regional Airport) and Helena (Helena Regional Airport) is 469 miles / 755 kilometers / 408 nautical miles.
The driving distance from Rapid City (RAP) to Helena (HLN) is 569 miles / 916 kilometers, and travel time by car is about 10 hours 51 minutes.
Rapid City Regional Airport – Helena Regional Airport
Search flights
Distance from Rapid City to Helena
There are several ways to calculate the distance from Rapid City to Helena. 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 Rapid City to Helena?
The estimated flight time from Rapid City Regional Airport to Helena Regional Airport is 1 hour and 23 minutes.
What is the time difference between Rapid City and Helena?
Flight carbon footprint between Rapid City Regional Airport (RAP) and Helena Regional Airport (HLN)
On average, flying from Rapid City to Helena 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 Rapid City to Helena
See the map of the shortest flight path between Rapid City Regional Airport (RAP) and Helena Regional Airport (HLN).
Airport information
| Origin | 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 |
| Destination | Helena Regional Airport |
|---|---|
| City: | Helena, MT |
| Country: | United States |
| IATA Code: | HLN |
| ICAO Code: | KHLN |
| Coordinates: | 46°36′24″N, 111°58′58″W |