There are
2,058 mi
from Westminster, CA to Oshkosh, WI
That's the driving distance. It would take 1 day 12 hours to go from Westminster, California to Oshkosh, Wisconsin.
The flight distance (direct flight from Westminster, CA to Oshkosh, WI) is 1,723.57 mi.
2,058 mi = 3.22 kms