Duncan, Oklahoma to San Antonio: Road Trip Guide & Distance

How far is Duncan, Oklahoma from San Antonio?

The distance from Duncan, Oklahoma to San Antonio is 352.3 miles (566.9 km) as the crow flies. San Antonio is located S of Duncan, Oklahoma. By car, the driving distance is approximately 402.3 miles, taking about 7h 21min. A direct flight would take roughly 1h 13min. Both are located in United States — Duncan, Oklahoma in Oklahoma and San Antonio in Texas.

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. As you head South, expect warmer temperatures. Make sure your car's AC is working well before embarking on this journey.

Coordinates come from public place data for Duncan, Oklahoma and San Antonio. The driving distance uses an OSRM road-route result when route data is available. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.