There are
336 mi
from Champaign, IL to Allouez, WI
That's the driving distance. It would take 6 hours 27 mins to go from Champaign, Illinois to Allouez, Wisconsin.
The flight distance (direct flight from Champaign, IL to Allouez, WI) is 301.55 mi.
336 mi = 541.04 kms