How far is Key West, FL, from Helena, MT?
The distance between Helena (Helena Regional Airport) and Key West (Key West International Airport) is 2257 miles / 3632 kilometers / 1961 nautical miles.
The driving distance from Helena (HLN) to Key West (EYW) is 2881 miles / 4637 kilometers, and travel time by car is about 52 hours 55 minutes.
Helena Regional Airport – Key West International Airport
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Distance from Helena to Key West
There are several ways to calculate the distance from Helena to Key West. Here are two standard methods:
Vincenty's formula (applied above)- 2256.942 miles
- 3632.196 kilometers
- 1961.229 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- 2256.401 miles
- 3631.326 kilometers
- 1960.759 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 Key West?
The estimated flight time from Helena Regional Airport to Key West International Airport is 4 hours and 46 minutes.
What is the time difference between Helena and Key West?
The time difference between Helena and Key West is 2 hours. Key West is 2 hours ahead of Helena.
Flight carbon footprint between Helena Regional Airport (HLN) and Key West International Airport (EYW)
On average, flying from Helena to Key West generates about 247 kg of CO2 per passenger, and 247 kilograms equals 544 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 Key West
See the map of the shortest flight path between Helena Regional Airport (HLN) and Key West International Airport (EYW).
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 | Key West International Airport |
|---|---|
| City: | Key West, FL |
| Country: | United States |
| IATA Code: | EYW |
| ICAO Code: | KEYW |
| Coordinates: | 24°33′21″N, 81°45′34″W |