How far is Helena from Houston?
There are several ways to calculate distances between Houston and Helena. Here are two common 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 earth.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).
Estimated flight time from George Bush Intercontinental Airport (IAH) to Helena Regional Airport (HLN) is 3 hours 15 minutes.
Time difference and current local times
The time difference between Houston and Helena is 1 hour. Helena is 1 hour behind Houston.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 169 kg (372 pounds).
Houston to Helena flight map.
Frequent Flyer Miles Calculator
Houston (IAH) → Helena (HLN).