The flight time to Great Falls from O Fallon is 2 hours 20 minutes . This is approximate direct flying time, and include average plane speed 510 miles per hour. Total flight distance between O Fallon, MO and Great Falls, MT is about one thousand, one hundred and ninety-four miles or one thousand, nine hundred and twenty-two km. Real time can be different, and depends on the time of day, the type of aircraft, and can be significantly longer if there are transplants during the flight.
Flying time is about 2 hours 20 minutes
Select arrival and departure cities, current are O Fallon, MO and MT
This flight will take about two hours twenty minutes ;
You can buy ticket to plane or drive by car, check ; distance in miles between O Fallon and Great Falls
| Aircraft | Cruising speed | Time |
| Average | 510 mph | 2 hr 20 min |
| Boeing 737 | 515 mph | 2 hr 19 min |
| Boeing 777 | 554 mph | 2 hr 9 min |
| Airbus | 515 mph | 2 hr 19 min |
Dont forget to include time in airport before and after flight.
| Country | USA |
| State | Missouri |
| City | O Fallon, MO |
| Latitude | 38.81061 |
| Longitude | -90.69985 |
| Country | USA |
| State | Montana |
| City | Great Falls, MT |
| Latitude | 47.50024 |
| Longitude | -111.30081 |
Please note: current air time calculator show approximate distance and time between cities O Fallon, MO and Great Falls, MT. This values can be different if you flight from airports in this cities. To calculate exact time can be shown only when you buy ticket to the plane. We do not guarantee that there is an airline that connects city O Fallon and Great Falls. To find out if there is such a flight use the ticket purchase service.