There are
2,008 mi
from Oshkosh, WI to Fontana, CA
That's the driving distance. It would take 1 day 11 hours to go from Oshkosh, Wisconsin to Fontana, California.
The flight distance (direct flight from Oshkosh, WI to Fontana, CA) is 1,683.87 mi.
2,008 mi = 3,230.83 kms