There are
635 mi
from Orem, UT to Monrovia, CA
That's the driving distance. It would take 11 hours 3 mins to go from Orem, Utah to Monrovia, California.
The flight distance (direct flight from Orem, UT to Monrovia, CA) is 548.42 mi.
635 mi = 1,022.49 kms