Miles between Thornton, CO and Collinsville, IL

There are
864 mi
from Thornton, CO to Collinsville, IL

That's the driving distance. It would take 15 hours 22 mins to go from Thornton, Colorado to Collinsville, Illinois.

The flight distance (direct flight from Thornton, CO to Collinsville, IL) is 804.99 mi.

864 mi = 1,390.97 kms