There are
683 mi
from Buena Park, CA to South Salt Lake, UT
That's the driving distance. It would take 11 hours 54 mins to go from Buena Park, California to South Salt Lake, Utah.
The flight distance (direct flight from Buena Park, CA to South Salt Lake, UT) is 580.06 mi.
683 mi = 1,099.45 kms