How far is Helena, MT, from Houston, TX?
The distance between Houston (Houston George Bush Intercontinental Airport) and Helena (Helena Regional Airport) is 1454 miles / 2340 kilometers / 1263 nautical miles.
The driving distance from Houston (IAH) to Helena (HLN) is 1812 miles / 2916 kilometers, and travel time by car is about 32 hours 8 minutes.
Houston George Bush Intercontinental Airport – Helena Regional Airport
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Distance from Houston to Helena
There are several ways to calculate the distance from Houston to Helena. Here are two standard methods:
Vincenty's formula (applied above)- 1453.955 miles
- 2339.914 kilometers
- 1263.453 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- 1454.201 miles
- 2340.309 kilometers
- 1263.666 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 Houston to Helena?
The estimated flight time from Houston George Bush Intercontinental Airport to Helena Regional Airport is 3 hours and 15 minutes.
What is the time difference between Houston and Helena?
The time difference between Houston and Helena is 1 hour. Helena is 1 hour behind Houston.
Flight carbon footprint between Houston George Bush Intercontinental Airport (IAH) and Helena Regional Airport (HLN)
On average, flying from Houston to Helena generates about 177 kg of CO2 per passenger, and 177 kilograms equals 389 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Houston to Helena
See the map of the shortest flight path between Houston George Bush Intercontinental Airport (IAH) and Helena Regional Airport (HLN).
Airport information
| Origin | Houston George Bush Intercontinental Airport |
|---|---|
| City: | Houston, TX |
| Country: | United States  |
| IATA Code: | IAH |
| ICAO Code: | KIAH |
| Coordinates: | 29°59′3″N, 95°20′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 |