There are
2,243 mi
from Oshkosh, WI to Watsonville, CA
That's the driving distance. It would take 1 day 15 hours to go from Oshkosh, Wisconsin to Watsonville, California.
The flight distance (direct flight from Oshkosh, WI to Watsonville, CA) is 1,800.23 mi.
2,243 mi = 3,609.52 kms