Air Miles Calculator

Distance between Houston, TX (IAH) and Helena, MT (HLN)

Distance from Houston to Helena (George Bush Intercontinental Airport – Helena Regional Airport) is 1454 miles / 2340 kilometers / 1263 nautical miles.

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).

Flight duration

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.

Time Difference

Houston
Helena

Houston, TX

 CST

Helena, MT

 MST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 169 kg (372 pounds).

Airport information


A George Bush Intercontinental Airport
City: Houston, TX
Country: United States Flag of United States
IATA Code: IAH
ICAO Code: KIAH
Coordinates: 29°59′3″N, 95°20′29″W

B Helena Regional Airport
City: Helena, MT
Country: United States Flag of United States
IATA Code: HLN
ICAO Code: KHLN
Coordinates: 46°36′24″N, 111°58′58″W

Map

Houston to Helena flight map.

Frequent Flyer Miles Calculator

Houston (IAH) → Helena (HLN).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
1454
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1454

Round trip?