There are
240 mi
from Champaign, IL to Mequon, WI
That's the driving distance. It would take 4 hours 45 mins to go from Champaign, Illinois to Mequon, Wisconsin.
The flight distance (direct flight from Champaign, IL to Mequon, WI) is 215.93 mi.
240 mi = 385.90 kms