There are
2,021 mi
from Oshkosh, WI to Montclair, CA
That's the driving distance. It would take 1 day 11 hours to go from Oshkosh, Wisconsin to Montclair, California.
The flight distance (direct flight from Oshkosh, WI to Montclair, CA) is 1,696.70 mi.
2,021 mi = 3,252.38 kms