There are
2,956 mi
from San Leandro, CA to Danbury, CT
That's the driving distance. It would take 2 days 4 hours to go from San Leandro, California to Danbury, Connecticut.
The flight distance (direct flight from San Leandro, CA to Danbury, CT) is 2,572.47 mi.
2,956 mi = 3.22 kms