There are
2,339 mi
from Walnut Creek, CA to Greenville, OH
That's the driving distance. It would take 1 day 16 hours to go from Walnut Creek, California to Greenville, Ohio.
The flight distance (direct flight from Walnut Creek, CA to Greenville, OH) is 2,000.70 mi.
2,339 mi = 3,764.99 kms