Casper to Sioux Falls: Road Trip Guide & Distance

How far is Casper from Sioux Falls?

The distance from Casper to Sioux Falls is 484.7 miles (780.1 km) as the crow flies. Sioux Falls is located E of Casper. By car, the driving distance is approximately 581.7 miles, taking about 11h 42min. A direct flight would take roughly 1h 29min. Both are located in United States — Casper in Wyoming and Sioux Falls 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 Casper and Sioux 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.