Miles between Thornton, CO and Lemont, IL

There are
986 mi
from Thornton, CO to Lemont, IL

That's the driving distance. It would take 17 hours 24 mins to go from Thornton, Colorado to Lemont, Illinois.

The flight distance (direct flight from Thornton, CO to Lemont, IL) is 895.22 mi.

986 mi = 1,587.20 kms