Miles between Thornton, CO and Gurnee, IL

There are
1,020 mi
from Thornton, CO to Gurnee, IL

That's the driving distance. It would take 18 hours 6 mins to go from Thornton, Colorado to Gurnee, Illinois.

The flight distance (direct flight from Thornton, CO to Gurnee, IL) is 903.55 mi.

1,020 mi = 1.61 kms