There are
3,107 mi
from San Leandro, CA to Watertown, MA
That's the driving distance. It would take 2 days 7 hours to go from San Leandro, California to Watertown, Massachusetts.
The flight distance (direct flight from San Leandro, CA to Watertown, MA) is 2,674.63 mi.
3,107 mi = 4.83 kms