How far is Helena, MT, from St. Theresa Point?
The distance between St. Theresa Point (St. Theresa Point Airport) and Helena (Helena Regional Airport) is 906 miles / 1458 kilometers / 787 nautical miles.
St. Theresa Point Airport – Helena Regional Airport
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Distance from St. Theresa Point to Helena
There are several ways to calculate the distance from St. Theresa Point to Helena. Here are two standard methods:
Vincenty's formula (applied above)- 905.912 miles
- 1457.923 kilometers
- 787.216 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- 903.873 miles
- 1454.643 kilometers
- 785.444 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 St. Theresa Point to Helena?
The estimated flight time from St. Theresa Point Airport to Helena Regional Airport is 2 hours and 12 minutes.
What is the time difference between St. Theresa Point and Helena?
Flight carbon footprint between St. Theresa Point Airport (YST) and Helena Regional Airport (HLN)
On average, flying from St. Theresa Point to Helena generates about 144 kg of CO2 per passenger, and 144 kilograms equals 317 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path from St. Theresa Point to Helena
See the map of the shortest flight path between St. Theresa Point Airport (YST) and Helena Regional Airport (HLN).
Airport information
| Origin | St. Theresa Point Airport |
|---|---|
| City: | St. Theresa Point |
| Country: | Canada  |
| IATA Code: | YST |
| ICAO Code: | CYST |
| Coordinates: | 53°50′44″N, 94°51′6″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 |