How far is St. Theresa Point from Helena, MT?
The distance between Helena (Helena Regional Airport) and St. Theresa Point (St. Theresa Point Airport) is 906 miles / 1458 kilometers / 787 nautical miles.
Helena Regional Airport – St. Theresa Point Airport
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Distance from Helena to St. Theresa Point
There are several ways to calculate the distance from Helena to St. Theresa Point. 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 Helena to St. Theresa Point?
The estimated flight time from Helena Regional Airport to St. Theresa Point Airport is 2 hours and 12 minutes.
What is the time difference between Helena and St. Theresa Point?
Flight carbon footprint between Helena Regional Airport (HLN) and St. Theresa Point Airport (YST)
On average, flying from Helena to St. Theresa Point 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 Helena to St. Theresa Point
See the map of the shortest flight path between Helena Regional Airport (HLN) and St. Theresa Point Airport (YST).
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 | 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 |