Miles between Thornton, CO and Naperville, IL

There are
969 mi
from Thornton, CO to Naperville, IL

That's the driving distance. It would take 17 hours 3 mins to go from Thornton, Colorado to Naperville, Illinois.

The flight distance (direct flight from Thornton, CO to Naperville, IL) is 888.08 mi.

969 mi = 1,559.97 kms