There are
2,123 mi
from Oshkosh, WI to Fairfield, CA
That's the driving distance. It would take 1 day 13 hours to go from Oshkosh, Wisconsin to Fairfield, California.
The flight distance (direct flight from Oshkosh, WI to Fairfield, CA) is 1,775.15 mi.
2,123 mi = 3,417.42 kms