How far is Helena, MT, from Rome?

The distance between Rome (Ciampino–G. B. Pastine International Airport) and Helena (Helena Regional Airport) is 5461 miles / 8789 kilometers / 4746 nautical miles.

Distance from Rome to Helena

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

Vincenty's formula (applied above)

• 5461.311 miles
• 8789.128 kilometers
• 4745.749 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

• 5446.811 miles
• 8765.792 kilometers
• 4733.149 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 Rome to Helena?

The estimated flight time from Ciampino–G. B. Pastine International Airport to Helena Regional Airport is 10 hours and 50 minutes.

What is the time difference between Rome and Helena?

The time difference between Rome and Helena is 8 hours. Helena is 8 hours behind Rome.

Flight carbon footprint between Ciampino–G. B. Pastine International Airport (CIA) and Helena Regional Airport (HLN)

On average, flying from Rome to Helena generates about 644 kg of CO2 per passenger, and 644 kilograms equals 1 421 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Rome to Helena

See the map of the shortest flight path between Ciampino–G. B. Pastine International Airport (CIA) and Helena Regional Airport (HLN).

Airport information

Origin	Ciampino–G. B. Pastine International Airport
City:	Rome
Country:	Italy
IATA Code:	CIA
ICAO Code:	LIRA
Coordinates:	41°47′57″N, 12°35′41″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