There are
2,164 mi
from Oshkosh, WI to Piedmont, CA
That's the driving distance. It would take 1 day 13 hours to go from Oshkosh, Wisconsin to Piedmont, California.
The flight distance (direct flight from Oshkosh, WI to Piedmont, CA) is 1,796.69 mi.
2,164 mi = 3,481.97 kms