There are
2,501 mi
from Youngstown, OH to Walnut Creek, CA
That's the driving distance. It would take 1 day 19 hours to go from Youngstown, Ohio to Walnut Creek, California.
The flight distance (direct flight from Youngstown, OH to Walnut Creek, CA) is 2,198.14 mi.
2,501 mi = 3.22 kms