There are
2,439 mi
from Parma, OH to Walnut Creek, CA
That's the driving distance. It would take 1 day 18 hours to go from Parma, Ohio to Walnut Creek, California.
The flight distance (direct flight from Parma, OH to Walnut Creek, CA) is 2,140.10 mi.
2,439 mi = 3.22 kms