How far is Helena, MT, from Bucharest?

The distance between Bucharest (Bucharest Henri Coandă International Airport) and Helena (Helena Regional Airport) is 5655 miles / 9100 kilometers / 4914 nautical miles.

Distance from Bucharest to Helena

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

Vincenty's formula (applied above)

• 5654.617 miles
• 9100.224 kilometers
• 4913.728 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

• 5639.181 miles
• 9075.383 kilometers
• 4900.315 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 Bucharest to Helena?

The estimated flight time from Bucharest Henri Coandă International Airport to Helena Regional Airport is 11 hours and 12 minutes.

What is the time difference between Bucharest and Helena?

The time difference between Bucharest and Helena is 9 hours. Helena is 9 hours behind Bucharest.

Flight carbon footprint between Bucharest Henri Coandă International Airport (OTP) and Helena Regional Airport (HLN)

On average, flying from Bucharest to Helena generates about 670 kg of CO2 per passenger, and 670 kilograms equals 1 477 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Bucharest to Helena

See the map of the shortest flight path between Bucharest Henri Coandă International Airport (OTP) and Helena Regional Airport (HLN).

Airport information

Origin	Bucharest Henri Coandă International Airport
City:	Bucharest
Country:	Romania
IATA Code:	OTP
ICAO Code:	LROP
Coordinates:	44°34′19″N, 26°6′7″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