Map of flight path and driving directions from Watertown to Helena.
Shortest flight path between Watertown International Airport (ART) and Helena Regional Airport (HLN).
How far is Helena from Watertown?
There are several ways to calculate distances between Watertown and Helena. Here are two common methods:Vincenty's formula (applied above)
- 1746.613 miles
- 2810.901 kilometers
- 1517.765 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
- 1741.772 miles
- 2803.110 kilometers
- 1513.559 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).
Time difference and current local times
The time difference between Watertown and Helena is 2 hours. Helena is 2 hours behind Watertown.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 196 kg (432 pounds).
Frequent Flyer Miles Calculator
Watertown (ART) → Helena (HLN).