There are
1,062 mi
from Thornton, CO to Kaukauna, WI
That's the driving distance. It would take 19 hours 26 mins to go from Thornton, Colorado to Kaukauna, Wisconsin.
The flight distance (direct flight from Thornton, CO to Kaukauna, WI) is 907.11 mi.
1,062 mi = 1.61 kms