There are
2,420 mi
from Youngstown, OH to Simi Valley, CA
That's the driving distance. It would take 1 day 18 hours to go from Youngstown, Ohio to Simi Valley, California.
The flight distance (direct flight from Youngstown, OH to Simi Valley, CA) is 2,119.97 mi.
2,420 mi = 3.22 kms