There are
2,346 mi
from Walnut Creek, CA to Dayton, OH
That's the driving distance. It would take 1 day 17 hours to go from Walnut Creek, California to Dayton, Ohio.
The flight distance (direct flight from Walnut Creek, CA to Dayton, OH) is 2,027.27 mi.
2,346 mi = 3,775.83 kms