Idaho Falls to Mount Rainier: Road Trip Guide & Distance

How far is Idaho Falls from Mount Rainier?

The distance from Idaho Falls to Mount Rainier is 528 miles (849.7 km) as the crow flies. Mount Rainier is located WNW of Idaho Falls. By car, the driving distance is approximately 633.5 miles, taking about 12h 45min. A direct flight would take roughly 1h 34min. Both are located in United States — Idaho Falls in Idaho and Mount Rainier in Washington.

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.

Coordinates come from public place data for Idaho Falls and Mount Rainier. 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.