There are
2,908 mi
from Walnut Creek, CA to Tarrytown, NY
That's the driving distance. It would take 2 days 3 hours to go from Walnut Creek, California to Tarrytown, New York.
The flight distance (direct flight from Walnut Creek, CA to Tarrytown, NY) is 2,546.95 mi.
2,908 mi = 4,679.35 kms