There are
2,051 mi
from Oshkosh, WI to Buena Park, CA
That's the driving distance. It would take 1 day 12 hours to go from Oshkosh, Wisconsin to Buena Park, California.
The flight distance (direct flight from Oshkosh, WI to Buena Park, CA) is 1,719.39 mi.
2,051 mi = 3,300.27 kms