There are
2,320 mi
from Parma, OH to Walnut, CA
That's the driving distance. It would take 1 day 16 hours to go from Parma, Ohio to Walnut, California.
The flight distance (direct flight from Parma, OH to Walnut, CA) is 2,024.44 mi.
2,320 mi = 3,733.48 kms