Miles between San Marcos, CA and Duncanville, TX

There are
1,366 mi
from San Marcos, CA to Duncanville, TX

That's the driving distance. It would take 23 hours 30 mins to go from San Marcos, California to Duncanville, Texas.

The flight distance (direct flight from San Marcos, CA to Duncanville, TX) is 1,173.89 mi.

1,366 mi = 1.61 kms