Idaho Falls to Rapid City: Road Trip Guide & Distance

How far is Idaho Falls from Rapid City?

The distance from Idaho Falls to Rapid City is 441 miles (709.8 km) as the crow flies. Rapid City is located E of Idaho Falls. By car, the driving distance is approximately 529.3 miles, taking about 10h 39min. A direct flight would take roughly 1h 23min. Both are located in United States — Idaho Falls in Idaho and Rapid City in South Dakota.

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

Coordinates come from public place data for Idaho Falls and Rapid 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.