Miles between San Marcos, CA and Duncan, OK

There are
1,325 mi
from San Marcos, CA to Duncan, OK

That's the driving distance. It would take 23 hours 37 mins to go from San Marcos, California to Duncan, Oklahoma.

The flight distance (direct flight from San Marcos, CA to Duncan, OK) is 1,104.88 mi.

1,325 mi = 2,133.16 kms