Casper to Watertown, South Dakota: Road Trip Guide & Distance

How far is Casper from Watertown, South Dakota?

The distance from Casper to Watertown, South Dakota is 478.8 miles (770.5 km) as the crow flies. Watertown, South Dakota is located ENE of Casper. By car, the driving distance is approximately 574.5 miles, taking about 11h 33min. A direct flight would take roughly 1h 28min. Both are located in United States — Casper in Wyoming and Watertown, South Dakota 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 Watertown, South Dakota. 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.