How far is Helena, MT, from Key West, FL?
The distance between Key West (Key West International Airport) and Helena (Helena Regional Airport) is 2257 miles / 3632 kilometers / 1961 nautical miles.
The driving distance from Key West (EYW) to Helena (HLN) is 2878 miles / 4632 kilometers, and travel time by car is about 52 hours 56 minutes.
Key West International Airport – Helena Regional Airport
Search flights
Distance from Key West to Helena
There are several ways to calculate the distance from Key West to Helena. 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 Key West to Helena?
The estimated flight time from Key West International Airport to Helena Regional Airport is 4 hours and 46 minutes.
What is the time difference between Key West and Helena?
The time difference between Key West and Helena is 2 hours. Helena is 2 hours behind Key West.
Flight carbon footprint between Key West International Airport (EYW) and Helena Regional Airport (HLN)
On average, flying from Key West to Helena 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 Key West to Helena
See the map of the shortest flight path between Key West International Airport (EYW) and Helena Regional Airport (HLN).
Airport information
| Origin | 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 |
| 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 |