How far is Helena, MT, from St Martin?

The distance between St Martin (Grand Case-Espérance Airport) and Helena (Helena Regional Airport) is 3394 miles / 5463 kilometers / 2950 nautical miles.

Distance from St Martin to Helena

There are several ways to calculate the distance from St Martin to Helena. Here are two standard methods:

Vincenty's formula (applied above)

• 3394.261 miles
• 5462.534 kilometers
• 2949.532 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

• 3392.616 miles
• 5459.887 kilometers
• 2948.103 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 St Martin to Helena?

The estimated flight time from Grand Case-Espérance Airport to Helena Regional Airport is 6 hours and 55 minutes.

What is the time difference between St Martin and Helena?

The time difference between St Martin and Helena is 3 hours. Helena is 3 hours behind St Martin.

Flight carbon footprint between Grand Case-Espérance Airport (SFG) and Helena Regional Airport (HLN)

On average, flying from St Martin to Helena generates about 382 kg of CO2 per passenger, and 382 kilograms equals 842 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from St Martin to Helena

See the map of the shortest flight path between Grand Case-Espérance Airport (SFG) and Helena Regional Airport (HLN).

Airport information

Origin	Grand Case-Espérance Airport
City:	St Martin
Country:	Saint Martin
IATA Code:	SFG
ICAO Code:	TFFG
Coordinates:	18°5′59″N, 63°2′49″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