Miles between Thornton, CO and Rock Island, IL

There are
831 mi
from Thornton, CO to Rock Island, IL

That's the driving distance. It would take 14 hours 37 mins to go from Thornton, Colorado to Rock Island, Illinois.

The flight distance (direct flight from Thornton, CO to Rock Island, IL) is 761.64 mi.

831 mi = 1,337.15 kms