There are
191 mi
from Oshkosh, WI to Romeoville, IL
That's the driving distance. It would take 3 hours 48 mins to go from Oshkosh, Wisconsin to Romeoville, Illinois.
The flight distance (direct flight from Oshkosh, WI to Romeoville, IL) is 165.84 mi.
191 mi = 307.32 kms