Casper to Duncan, Oklahoma: Road Trip Guide & Distance

How far is Casper from Duncan, Oklahoma?

The distance from Casper to Duncan, Oklahoma is 732 miles (1178.1 km) as the crow flies. Duncan, Oklahoma is located SE of Casper. By car, the driving distance is approximately 878.4 miles, taking about 17h 40min. A direct flight would take roughly 1h 58min. Both are located in United States — Casper in Wyoming and Duncan, Oklahoma in Oklahoma.

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. For a trip of this distance, flying is significantly faster. However, driving offers the flexibility to explore stops along the way.

Coordinates come from public place data for Casper and Duncan, Oklahoma. 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.