There are
2,084 mi
from San Marcos, CA to Wauwatosa, WI
That's the driving distance. It would take 1 day 12 hours to go from San Marcos, California to Wauwatosa, Wisconsin.
The flight distance (direct flight from San Marcos, CA to Wauwatosa, WI) is 1,715.64 mi.
2,084 mi = 3.22 kms