There are
352 mi
from Decatur, IL to Kaukauna, WI
That's the driving distance. It would take 6 hours 52 mins to go from Decatur, Illinois to Kaukauna, Wisconsin.
The flight distance (direct flight from Decatur, IL to Kaukauna, WI) is 308.61 mi.
352 mi = 566.83 kms