There are
2,053 mi
from Oshkosh, WI to Downey, CA
That's the driving distance. It would take 1 day 12 hours to go from Oshkosh, Wisconsin to Downey, California.
The flight distance (direct flight from Oshkosh, WI to Downey, CA) is 1,723.20 mi.
2,053 mi = 3,303.22 kms