How far is Great Falls, MT, from Ontario, CA?
The distance between Ontario (Ontario International Airport) and Great Falls (Great Falls International Airport) is 982 miles / 1580 kilometers / 853 nautical miles.
The driving distance from Ontario (ONT) to Great Falls (GTF) is 1220 miles / 1964 kilometers, and travel time by car is about 20 hours 43 minutes.
Ontario International Airport – Great Falls International Airport
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Distance from Ontario to Great Falls
There are several ways to calculate the distance from Ontario to Great Falls. Here are two standard methods:
Vincenty's formula (applied above)- 981.570 miles
- 1579.683 kilometers
- 852.961 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- 982.439 miles
- 1581.083 kilometers
- 853.717 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 Ontario to Great Falls?
The estimated flight time from Ontario International Airport to Great Falls International Airport is 2 hours and 21 minutes.
What is the time difference between Ontario and Great Falls?
Flight carbon footprint between Ontario International Airport (ONT) and Great Falls International Airport (GTF)
On average, flying from Ontario to Great Falls generates about 150 kg of CO2 per passenger, and 150 kilograms equals 330 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Ontario to Great Falls
See the map of the shortest flight path between Ontario International Airport (ONT) and Great Falls International Airport (GTF).
Airport information
| Origin | Ontario International Airport |
|---|---|
| City: | Ontario, CA |
| Country: | United States  |
| IATA Code: | ONT |
| ICAO Code: | KONT |
| Coordinates: | 34°3′21″N, 117°36′3″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 |