There are
457 mi
from Parma, OH to Oconomowoc, WI
That's the driving distance. It would take 8 hours 44 mins to go from Parma, Ohio to Oconomowoc, Wisconsin.
The flight distance (direct flight from Parma, OH to Oconomowoc, WI) is 365.92 mi.
457 mi = 735.60 kms