How far is Great Falls, MT, from Rockford, IL?
The distance between Rockford (Chicago Rockford International Airport) and Great Falls (Great Falls International Airport) is 1149 miles / 1849 kilometers / 998 nautical miles.
The driving distance from Rockford (RFD) to Great Falls (GTF) is 1319 miles / 2122 kilometers, and travel time by car is about 24 hours 9 minutes.
Chicago Rockford International Airport – Great Falls International Airport
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Distance from Rockford to Great Falls
There are several ways to calculate the distance from Rockford to Great Falls. Here are two standard methods:
Vincenty's formula (applied above)- 1148.865 miles
- 1848.919 kilometers
- 998.337 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- 1146.065 miles
- 1844.413 kilometers
- 995.903 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 Rockford to Great Falls?
The estimated flight time from Chicago Rockford International Airport to Great Falls International Airport is 2 hours and 40 minutes.
What is the time difference between Rockford and Great Falls?
Flight carbon footprint between Chicago Rockford International Airport (RFD) and Great Falls International Airport (GTF)
On average, flying from Rockford to Great Falls generates about 159 kg of CO2 per passenger, and 159 kilograms equals 351 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Rockford to Great Falls
See the map of the shortest flight path between Chicago Rockford International Airport (RFD) and Great Falls International Airport (GTF).
Airport information
| Origin | Chicago Rockford International Airport |
|---|---|
| City: | Rockford, IL |
| Country: | United States  |
| IATA Code: | RFD |
| ICAO Code: | KRFD |
| Coordinates: | 42°11′43″N, 89°5′49″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 |