How far is Helena, MT, from Shannon?
The distance between Shannon (Shannon Airport) and Helena (Helena Regional Airport) is 4231 miles / 6809 kilometers / 3677 nautical miles.
Shannon Airport – Helena Regional Airport
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Distance from Shannon to Helena
There are several ways to calculate the distance from Shannon to Helena. Here are two standard methods:
Vincenty's formula (applied above)- 4231.099 miles
- 6809.294 kilometers
- 3676.724 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- 4218.393 miles
- 6788.846 kilometers
- 3665.684 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 Shannon to Helena?
The estimated flight time from Shannon Airport to Helena Regional Airport is 8 hours and 30 minutes.
What is the time difference between Shannon and Helena?
The time difference between Shannon and Helena is 7 hours. Helena is 7 hours behind Shannon.
Flight carbon footprint between Shannon Airport (SNN) and Helena Regional Airport (HLN)
On average, flying from Shannon to Helena generates about 485 kg of CO2 per passenger, and 485 kilograms equals 1 070 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path from Shannon to Helena
See the map of the shortest flight path between Shannon Airport (SNN) and Helena Regional Airport (HLN).
Airport information
| Origin | Shannon Airport |
|---|---|
| City: | Shannon |
| Country: | Ireland  |
| IATA Code: | SNN |
| ICAO Code: | EINN |
| Coordinates: | 52°42′7″N, 8°55′29″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 |