There are
496 mi
from Oshkosh, WI to Wilmington, OH
That's the driving distance. It would take 9 hours 51 mins to go from Oshkosh, Wisconsin to Wilmington, Ohio.
The flight distance (direct flight from Oshkosh, WI to Wilmington, OH) is 398.83 mi.
496 mi = 798.75 kms