Helena, Montana to Idaho Falls: Road Trip Guide & Distance

How far is Helena, Montana from Idaho Falls?

The distance from Helena, Montana to Idaho Falls is 216 miles (347.6 km) as the crow flies. Idaho Falls is located S of Helena, Montana. By car, the driving distance is approximately 270 miles, taking about 5h 26min. A direct flight would take roughly 56min. Both are located in United States — Helena, Montana in Montana and Idaho Falls in Idaho.

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.

Coordinates come from public place data for Helena, Montana and Idaho 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.