There are
2,962 mi
from Walnut Creek, CA to New Haven, CT
That's the driving distance. It would take 2 days 4 hours to go from Walnut Creek, California to New Haven, Connecticut.
The flight distance (direct flight from Walnut Creek, CA to New Haven, CT) is 2,591.22 mi.
2,962 mi = 4,766.27 kms