Boulder to Idaho Falls: Road Trip Guide & Distance

How far is Boulder from Idaho Falls?

The distance from Boulder to Idaho Falls is 422.2 miles (679.5 km) as the crow flies. Idaho Falls is located NW of Boulder. By car, the driving distance is approximately 506.7 miles, taking about 10h 12min. A direct flight would take roughly 1h 21min. Both are located in United States — Boulder in Colorado and Idaho Falls in Idaho.

This is a solid day of driving. Be sure to take breaks every 2-3 hours to avoid driver fatigue, and plan your meals ahead of time. 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.

Coordinates come from public place data for Boulder 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.