Distance between Chicago, IL (ORD) and Great Falls, MT (GTF)
Distance from Chicago to Great Falls (Great Falls International Airport – O'Hare International Airport) is 1210 miles / 1948 kilometers / 1052 nautical miles.
Calculations with different 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).
Flight duration
Estimated flight time from 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
Great Falls
Chicago, IL
CDT
Great Falls, MT
MDT
Airport information
| A | 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 |
Map
Chicago to Great Falls flight map.
Frequent Flyer Miles Calculator
Chicago (ORD) → Great Falls (GTF).
Elite level bonus (%):
Booking class bonus (%):
Air miles:
1210
Elite level bonus:
0
Booking class bonus:
0
In total
Total frequent flyer miles:
1210
Round trip?