Calgary to Great Falls: Road Trip Guide & Distance

How far is Calgary from Great Falls?

The distance from Calgary to Great Falls is 274.9 miles (442.4 km) as the crow flies. Great Falls is located SSE of Calgary. By car, the driving distance is approximately 343.6 miles, taking about 6h 55min. A direct flight would take roughly 1h 3min. Calgary is in Alberta, Canada, while Great Falls is in Montana, United States.

For a drive of this length, it's recommended to plan at least one quick rest stop to stretch your legs and grab a coffee. Heading East means you'll be driving into the sunrise if you start early. Keep your windshield clean for the best visibility. Keep in mind this route crosses international borders. Don't forget your passport, and check current border crossing times and vehicle insurance requirements.

Coordinates come from public place data for Calgary 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.