How far is Portsmouth, NH, from Great Falls, MT?
The distance between Great Falls (Great Falls International Airport) and Portsmouth (Portsmouth International Airport at Pease) is 1977 miles / 3182 kilometers / 1718 nautical miles.
The driving distance from Great Falls (GTF) to Portsmouth (PSM) is 2330 miles / 3750 kilometers, and travel time by car is about 44 hours 30 minutes.
Great Falls International Airport – Portsmouth International Airport at Pease
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Distance from Great Falls to Portsmouth
There are several ways to calculate the distance from Great Falls to Portsmouth. 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 Great Falls to Portsmouth?
The estimated flight time from Great Falls International Airport to Portsmouth International Airport at Pease is 4 hours and 14 minutes.
What is the time difference between Great Falls and Portsmouth?
Flight carbon footprint between Great Falls International Airport (GTF) and Portsmouth International Airport at Pease (PSM)
On average, flying from Great Falls to Portsmouth 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 Great Falls to Portsmouth
See the map of the shortest flight path between Great Falls International Airport (GTF) and Portsmouth International Airport at Pease (PSM).
Airport information
| Origin | 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 |
| Destination | 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 |