There are
417 mi
from Simi Valley, CA to Rohnert Park, CA
That's the driving distance. It would take 7 hours 51 mins to go from Simi Valley, California to Rohnert Park, California.
The flight distance (direct flight from Simi Valley, CA to Rohnert Park, CA) is 355.91 mi.
417 mi = 671.40 kms