There are
643 mi
from Provo, UT to Buena Park, CA
That's the driving distance. It would take 11 hours 13 mins to go from Provo, Utah to Buena Park, California.
The flight distance (direct flight from Provo, UT to Buena Park, CA) is 561.50 mi.
643 mi = 1,034.50 kms