How far is Helena, MT, from Fort Hood, TX?
The distance between Fort Hood (Killeen–Fort Hood Regional Airport) and Helena (Helena Regional Airport) is 1312 miles / 2111 kilometers / 1140 nautical miles.
The driving distance from Fort Hood (GRK) to Helena (HLN) is 1673 miles / 2693 kilometers, and travel time by car is about 29 hours 39 minutes.
Killeen–Fort Hood Regional Airport – Helena Regional Airport
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Distance from Fort Hood to Helena
There are several ways to calculate the distance from Fort Hood to Helena. Here are two standard methods:
Vincenty's formula (applied above)- 1311.641 miles
- 2110.881 kilometers
- 1139.785 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- 1312.018 miles
- 2111.488 kilometers
- 1140.113 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 Fort Hood to Helena?
The estimated flight time from Killeen–Fort Hood Regional Airport to Helena Regional Airport is 2 hours and 59 minutes.
What is the time difference between Fort Hood and Helena?
The time difference between Fort Hood and Helena is 1 hour. Helena is 1 hour behind Fort Hood.
Flight carbon footprint between Killeen–Fort Hood Regional Airport (GRK) and Helena Regional Airport (HLN)
On average, flying from Fort Hood to Helena generates about 168 kg of CO2 per passenger, and 168 kilograms equals 370 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Fort Hood to Helena
See the map of the shortest flight path between Killeen–Fort Hood Regional Airport (GRK) and Helena Regional Airport (HLN).
Airport information
| Origin | Killeen–Fort Hood Regional Airport |
|---|---|
| City: | Fort Hood, TX |
| Country: | United States  |
| IATA Code: | GRK |
| ICAO Code: | KGRK |
| Coordinates: | 31°4′1″N, 97°49′44″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 |