Air Miles Calculator

Distance between Chicago, IL (ORD) and Great Falls, MT (GTF)

Flight distance from Chicago to Great Falls (Chicago O'Hare International Airport – Great Falls International Airport) is 1210 miles / 1948 kilometers / 1052 nautical miles. Estimated flight time is 2 hours 47 minutes.

Driving distance from Chicago (ORD) to Great Falls (GTF) is 1372 miles / 2208 kilometers and travel time by car is about 23 hours 33 minutes.

Map of flight path and driving directions from Chicago to Great Falls.

Shortest flight path between Chicago O'Hare International Airport (ORD) and Great Falls International Airport (GTF).

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).

Airport information


A Chicago 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

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

 CDT

Great Falls, MT

 MDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 162 kg (357 pounds).

Frequent Flyer Miles Calculator

Chicago (ORD) → Great Falls (GTF).

Distance:
1210
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1210

Round trip?