There are
199 mi
from Oshkosh, WI to Oswego, IL
That's the driving distance. It would take 4 hours 3 mins to go from Oshkosh, Wisconsin to Oswego, Illinois.
The flight distance (direct flight from Oshkosh, WI to Oswego, IL) is 162.10 mi.
199 mi = 320.74 kms