Great Falls to Sioux City: Road Trip Guide & Distance

How far is Great Falls from Sioux City?

The distance from Great Falls to Sioux City is 804.1 miles (1294 km) as the crow flies. Sioux City is located ESE of Great Falls. By car, the driving distance is approximately 964.9 miles, taking about 19h 25min. A direct flight would take roughly 2h 7min. Both are located in United States — Great Falls in Montana and Sioux City in Iowa.

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. Heading East means you'll be driving into the sunrise if you start early. Keep your windshield clean for the best visibility. 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 Great Falls and Sioux City. 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.