There are
643 mi
from Buena Park, CA to Provo, UT
That's the driving distance. It would take 11 hours 12 mins to go from Buena Park, California to Provo, Utah.
The flight distance (direct flight from Buena Park, CA to Provo, UT) is 561.50 mi.
643 mi = 1,034.77 kms