# Distance between Watertown, NY (ART) and Helena, MT (HLN)

Flight distance from Watertown to Helena (Watertown International Airport – Helena Regional Airport) is 1747 miles / 2811 kilometers / 1518 nautical miles. Estimated flight time is 3 hours 48 minutes.

Driving distance from Watertown (ART) to Helena (HLN) is 2097 miles / 3374 kilometers and travel time by car is about 37 hours 16 minutes.

## 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).

## Airport information

A Watertown International Airport
City: Watertown, NY
Country: United States
IATA Code: ART
ICAO Code: KART
Coordinates: 43°59′30″N, 76°1′18″W

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

## Time difference and current local times

The time difference between Watertown and Helena is 2 hours. Helena is 2 hours behind Watertown.

EDT

MDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 196 kg (432 pounds).

## Frequent Flyer Miles Calculator

Watertown (ART) → Helena (HLN).

Distance:
1747
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
1747

Round trip?