There are
972 mi
from Oshkosh, WI to Mt Vernon, NY
That's the driving distance. It would take 18 hours 17 mins to go from Oshkosh, Wisconsin to Mt Vernon, New York.
The flight distance (direct flight from Oshkosh, WI to Mt Vernon, NY) is 778.51 mi.
972 mi = 1,564.13 kms