There are
2,922 mi
from Walnut Creek, CA to Stamford, CT
That's the driving distance. It would take 2 days 3 hours to go from Walnut Creek, California to Stamford, Connecticut.
The flight distance (direct flight from Walnut Creek, CA to Stamford, CT) is 2,563.60 mi.
2,922 mi = 4,702.41 kms