There are
664 mi
from Simi Valley, CA to Provo, UT
That's the driving distance. It would take 11 hours 52 mins to go from Simi Valley, California to Provo, Utah.
The flight distance (direct flight from Simi Valley, CA to Provo, UT) is 568.15 mi.
664 mi = 1,068.09 kms