There are
2,115 mi
from Oshkosh, WI to Vacaville, CA
That's the driving distance. It would take 1 day 12 hours to go from Oshkosh, Wisconsin to Vacaville, California.
The flight distance (direct flight from Oshkosh, WI to Vacaville, CA) is 1,769.60 mi.
2,115 mi = 3,403.83 kms