Miles between Thornton, CO and East St Louis, IL

There are
855 mi
from Thornton, CO to East St Louis, IL

That's the driving distance. It would take 15 hours 9 mins to go from Thornton, Colorado to East St Louis, Illinois.

The flight distance (direct flight from Thornton, CO to East St Louis, IL) is 798.10 mi.

855 mi = 1,376.07 kms