There are
437 mi
from Oshkosh, WI to St Louis, MO
That's the driving distance. It would take 8 hours 10 mins to go from Oshkosh, Wisconsin to St Louis, Missouri.
The flight distance (direct flight from Oshkosh, WI to St Louis, MO) is 382.70 mi.
437 mi = 703.78 kms