How far is Fort Hood, TX, from Helena, MT?
The distance between Helena (Helena Regional Airport) and Fort Hood (Killeen–Fort Hood Regional Airport) is 1312 miles / 2111 kilometers / 1140 nautical miles.
The driving distance from Helena (HLN) to Fort Hood (GRK) is 1655 miles / 2663 kilometers, and travel time by car is about 29 hours 23 minutes.
Helena Regional Airport – Killeen–Fort Hood Regional Airport
Search flights
Distance from Helena to Fort Hood
There are several ways to calculate the distance from Helena to Fort Hood. 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 Helena to Fort Hood?
The estimated flight time from Helena Regional Airport to Killeen–Fort Hood Regional Airport is 2 hours and 59 minutes.
What is the time difference between Helena and Fort Hood?
The time difference between Helena and Fort Hood is 1 hour. Fort Hood is 1 hour ahead of Helena.
Flight carbon footprint between Helena Regional Airport (HLN) and Killeen–Fort Hood Regional Airport (GRK)
On average, flying from Helena to Fort Hood 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 Helena to Fort Hood
See the map of the shortest flight path between Helena Regional Airport (HLN) and Killeen–Fort Hood Regional Airport (GRK).
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 | 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 |