How far is Great Falls, MT, from Portland, ME?
The distance between Portland (Portland International Jetport) and Great Falls (Great Falls International Airport) is 1986 miles / 3196 kilometers / 1726 nautical miles.
The driving distance from Portland (PWM) to Great Falls (GTF) is 2371 miles / 3815 kilometers, and travel time by car is about 45 hours 14 minutes.
Portland International Jetport – Great Falls International Airport
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Distance from Portland to Great Falls
There are several ways to calculate the distance from Portland to Great Falls. Here are two standard methods:
Vincenty's formula (applied above)- 1985.891 miles
- 3195.982 kilometers
- 1725.692 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- 1980.405 miles
- 3187.153 kilometers
- 1720.925 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 Portland to Great Falls?
The estimated flight time from Portland International Jetport to Great Falls International Airport is 4 hours and 15 minutes.
What is the time difference between Portland and Great Falls?
Flight carbon footprint between Portland International Jetport (PWM) and Great Falls International Airport (GTF)
On average, flying from Portland to Great Falls generates about 216 kg of CO2 per passenger, and 216 kilograms equals 477 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Portland to Great Falls
See the map of the shortest flight path between Portland International Jetport (PWM) and Great Falls International Airport (GTF).
Airport information
| Origin | Portland International Jetport |
|---|---|
| City: | Portland, ME |
| Country: | United States  |
| IATA Code: | PWM |
| ICAO Code: | KPWM |
| Coordinates: | 43°38′46″N, 70°18′33″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 |