Air Miles Calculator

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 Flag of 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 Flag of 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?