Miles between St Louis, MO and San Marcos, TX

There are
854 mi
from St Louis, MO to San Marcos, TX

That's the driving distance. It would take 15 hours 44 mins to go from St Louis, Missouri to San Marcos, Texas.

The flight distance (direct flight from St Louis, MO to San Marcos, TX) is 747.97 mi.

854 mi = 1,374.57 kms