There are
751 mi
from Layton, UT to Larkspur, CA
That's the driving distance. It would take 13 hours 3 mins to go from Layton, Utah to Larkspur, California.
The flight distance (direct flight from Layton, UT to Larkspur, CA) is 602.73 mi.
751 mi = 1,208.49 kms