Miles between San Marcos, CA and Clayton, MO

There are
1,846 mi
from San Marcos, CA to Clayton, MO

That's the driving distance. It would take 1 day 8 hours to go from San Marcos, California to Clayton, Missouri.

The flight distance (direct flight from San Marcos, CA to Clayton, MO) is 1,543.67 mi.

1,846 mi = 1.61 kms