Miles between Thornton, CO and St Louis, MO

There are
851 mi
from Thornton, CO to St Louis, MO

That's the driving distance. It would take 15 hours 2 mins to go from Thornton, Colorado to St Louis, Missouri.

The flight distance (direct flight from Thornton, CO to St Louis, MO) is 794.16 mi.

851 mi = 1,370.16 kms