Distance between Chicago, IL (ORD) and Great Falls, MT (GTF)
Distance from Chicago to Great Falls (Chicago O'Hare International Airport – Great Falls International Airport) is 1210 miles / 1948 kilometers / 1052 nautical miles.
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Chicago - Great Falls
How far is Great Falls from Chicago?
There are several ways to calculate distances between Chicago and Great Falls. Here are two common methods:
Vincenty's formula (applied above)- 1210.473 miles
- 1948.067 kilometers
- 1051.872 nautical miles
Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.
Haversine formula- 1207.522 miles
- 1943.318 kilometers
- 1049.308 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).
Flight duration
Estimated flight time from Chicago O'Hare International Airport (ORD) to Great Falls International Airport (GTF) is 2 hours 47 minutes.
Time difference and current local times
The time difference between Chicago and Great Falls is 1 hour. Great Falls is 1 hour behind Chicago.
Time Difference
Chicago, IL
Great Falls, MT
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 162 kg (357 pounds).
Airport information
| A | Chicago O'Hare International Airport |
|---|---|
| City: | Chicago, IL |
| Country: | United States  |
| IATA Code: | ORD |
| ICAO Code: | KORD |
| Coordinates: | 41°58′42″N, 87°54′17″W |
| B | 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 |
Chicago to Great Falls flight path
Shortest flight path between Chicago O'Hare International Airport (ORD) and Great Falls International Airport (GTF).
Frequent Flyer Miles Calculator
Chicago (ORD) → Great Falls (GTF).
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