There are
2,116 mi
from Janesville, WI to San Leandro, CA
That's the driving distance. It would take 1 day 12 hours to go from Janesville, Wisconsin to San Leandro, California.
The flight distance (direct flight from Janesville, WI to San Leandro, CA) is 1,770.06 mi.
2,116 mi = 3,405.56 kms