How far is Helena, MT, from Chiang Mai?

The distance between Chiang Mai (Chiang Mai International Airport) and Helena (Helena Regional Airport) is 7537 miles / 12129 kilometers / 6549 nautical miles.

Distance from Chiang Mai to Helena

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

Vincenty's formula (applied above)

• 7536.601 miles
• 12128.984 kilometers
• 6549.127 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

• 7525.071 miles
• 12110.428 kilometers
• 6539.108 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 Chiang Mai to Helena?

The estimated flight time from Chiang Mai International Airport to Helena Regional Airport is 14 hours and 46 minutes.

What is the time difference between Chiang Mai and Helena?

The time difference between Chiang Mai and Helena is 14 hours. Helena is 14 hours behind Chiang Mai.

Flight carbon footprint between Chiang Mai International Airport (CNX) and Helena Regional Airport (HLN)

On average, flying from Chiang Mai to Helena generates about 931 kg of CO2 per passenger, and 931 kilograms equals 2 053 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Chiang Mai to Helena

See the map of the shortest flight path between Chiang Mai International Airport (CNX) and Helena Regional Airport (HLN).

Airport information

Origin	Chiang Mai International Airport
City:	Chiang Mai
Country:	Thailand
IATA Code:	CNX
ICAO Code:	VTCC
Coordinates:	18°46′0″N, 98°57′45″E

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