There are
650 mi
from Simi Valley, CA to Payson, UT
That's the driving distance. It would take 11 hours 36 mins to go from Simi Valley, California to Payson, Utah.
The flight distance (direct flight from Simi Valley, CA to Payson, UT) is 556.30 mi.
650 mi = 1,046.05 kms