There are
3,015 mi
from New Britain, CT to San Mateo, CA
That's the driving distance. It would take 2 days 5 hours to go from New Britain, Connecticut to San Mateo, California.
The flight distance (direct flight from New Britain, CT to San Mateo, CA) is 2,616.09 mi.
3,015 mi = 4,851.40 kms