There are
686 mi
from Layton, UT to Glendora, CA
That's the driving distance. It would take 11 hours 55 mins to go from Layton, Utah to Glendora, California.
The flight distance (direct flight from Layton, UT to Glendora, CA) is 576.71 mi.
686 mi = 1,104.68 kms