There are
2,370 mi
from Fostoria, OH to Walnut Creek, CA
That's the driving distance. It would take 1 day 17 hours to go from Fostoria, Ohio to Walnut Creek, California.
The flight distance (direct flight from Fostoria, OH to Walnut Creek, CA) is 2,054.80 mi.
2,370 mi = 3,814.38 kms