How far is Great Falls, MT, from Portsmouth, NH?
The distance between Portsmouth (Portsmouth International Airport at Pease) and Great Falls (Great Falls International Airport) is 1977 miles / 3182 kilometers / 1718 nautical miles.
The driving distance from Portsmouth (PSM) to Great Falls (GTF) is 2326 miles / 3744 kilometers, and travel time by car is about 44 hours 31 minutes.
Portsmouth International Airport at Pease – Great Falls International Airport
Search flights
Distance from Portsmouth to Great Falls
There are several ways to calculate the distance from Portsmouth to Great Falls. Here are two standard methods:
Vincenty's formula (applied above)- 1977.118 miles
- 3181.863 kilometers
- 1718.068 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- 1971.729 miles
- 3173.190 kilometers
- 1713.386 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 Portsmouth to Great Falls?
The estimated flight time from Portsmouth International Airport at Pease to Great Falls International Airport is 4 hours and 14 minutes.
What is the time difference between Portsmouth and Great Falls?
Flight carbon footprint between Portsmouth International Airport at Pease (PSM) and Great Falls International Airport (GTF)
On average, flying from Portsmouth to Great Falls generates about 216 kg of CO2 per passenger, and 216 kilograms equals 475 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Portsmouth to Great Falls
See the map of the shortest flight path between Portsmouth International Airport at Pease (PSM) and Great Falls International Airport (GTF).
Airport information
| Origin | Portsmouth International Airport at Pease |
|---|---|
| City: | Portsmouth, NH |
| Country: | United States  |
| IATA Code: | PSM |
| ICAO Code: | KPSM |
| Coordinates: | 43°4′40″N, 70°49′23″W |
| Destination | Great Falls International Airport |
|---|---|
| City: | Great Falls, MT |
| Country: | United States |
| IATA Code: | GTF |
| ICAO Code: | KGTF |
| Coordinates: | 47°28′55″N, 111°22′15″W |