Boise to Casper: Road Trip Guide & Distance

How far is Boise from Casper?

The distance from Boise to Casper is 500.1 miles (804.9 km) as the crow flies. Casper is located E of Boise. By car, the driving distance is approximately 600.2 miles, taking about 12h 4min. A direct flight would take roughly 1h 30min. Both are located in United States — Boise in Idaho and Casper in Wyoming.

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. 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 Boise and Casper. 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.