There are
638 mi
from Provo, UT to La Mirada, CA
That's the driving distance. It would take 11 hours 11 mins to go from Provo, Utah to La Mirada, California.
The flight distance (direct flight from Provo, UT to La Mirada, CA) is 559.23 mi.
638 mi = 1,027.27 kms