There are
2,880 mi
from San Clemente, CA to New Haven, CT
That's the driving distance. It would take 2 days 3 hours to go from San Clemente, California to New Haven, Connecticut.
The flight distance (direct flight from San Clemente, CA to New Haven, CT) is 2,484.95 mi.
2,880 mi = 4,635.37 kms