Miles between Thornton, CO and Summit, IL

There are
988 mi
from Thornton, CO to Summit, IL

That's the driving distance. It would take 17 hours 34 mins to go from Thornton, Colorado to Summit, Illinois.

The flight distance (direct flight from Thornton, CO to Summit, IL) is 905.43 mi.

988 mi = 1,589.71 kms