There are
2,460 mi
from Walnut Creek, CA to Willowick, OH
That's the driving distance. It would take 1 day 18 hours to go from Walnut Creek, California to Willowick, Ohio.
The flight distance (direct flight from Walnut Creek, CA to Willowick, OH) is 2,151.25 mi.
2,460 mi = 3,959.36 kms