Miles between St Charles, MO and San Marcos, TX

There are
855 mi
from St Charles, MO to San Marcos, TX

That's the driving distance. It would take 15 hours 49 mins to go from St Charles, Missouri to San Marcos, Texas.

The flight distance (direct flight from St Charles, MO to San Marcos, TX) is 746.54 mi.

855 mi = 1,376.50 kms