There are
2,354 mi
from Walnut Creek, CA to Blue Ash, OH
That's the driving distance. It would take 1 day 16 hours to go from Walnut Creek, California to Blue Ash, Ohio.
The flight distance (direct flight from Walnut Creek, CA to Blue Ash, OH) is 2,023.20 mi.
2,354 mi = 3,788.43 kms