There are
2,030 mi
from Oshkosh, WI to Diamond Bar, CA
That's the driving distance. It would take 1 day 12 hours to go from Oshkosh, Wisconsin to Diamond Bar, California.
The flight distance (direct flight from Oshkosh, WI to Diamond Bar, CA) is 1,704.31 mi.
2,030 mi = 3,267.35 kms