Miles between Thornton, CO and San Marcos, TX

There are
959 mi
from Thornton, CO to San Marcos, TX

That's the driving distance. It would take 17 hours 26 mins to go from Thornton, Colorado to San Marcos, Texas.

The flight distance (direct flight from Thornton, CO to San Marcos, TX) is 796.05 mi.

959 mi = 1,543.65 kms