There are
2,187 mi
from San Mateo, CA to Oshkosh, WI
That's the driving distance. It would take 1 day 14 hours to go from San Mateo, California to Oshkosh, Wisconsin.
The flight distance (direct flight from San Mateo, CA to Oshkosh, WI) is 1,808.93 mi.
2,187 mi = 3.22 kms