There are
2,358 mi
from Parma, OH to Simi Valley, CA
That's the driving distance. It would take 1 day 17 hours to go from Parma, Ohio to Simi Valley, California.
The flight distance (direct flight from Parma, OH to Simi Valley, CA) is 2,064.58 mi.
2,358 mi = 3.22 kms