Duncan, Oklahoma to Great Falls: Road Trip Guide & Distance

How far is Duncan, Oklahoma from Great Falls?

The distance from Duncan, Oklahoma to Great Falls is 1132.6 miles (1822.8 km) as the crow flies. Great Falls is located NNW of Duncan, Oklahoma. By car, the driving distance is approximately 1359.2 miles, taking about 27h 21min. A direct flight would take roughly 2h 47min. Both are located in United States — Duncan, Oklahoma in Oklahoma and Great Falls in Montana.

This is a serious multi-day road trip! We strongly recommend breaking this journey up with an overnight stay to ensure you arrive safely and refreshed. Since you'll be heading mostly West, pack a good pair of sunglasses if you plan to drive during the late afternoon to avoid the harsh sun glare. For a trip of this distance, flying is significantly faster. However, driving offers the flexibility to explore stops along the way.

Coordinates come from public place data for Duncan, Oklahoma and Great Falls. The driving distance is estimated from straight-line distance with a road-factor model, so confirm the route in your navigation app. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.