There are
684 mi
from Irvine, CA to Holladay, UT
That's the driving distance. It would take 12 hours 1 min to go from Irvine, California to Holladay, Utah.
The flight distance (direct flight from Irvine, CA to Holladay, UT) is 583.55 mi.
684 mi = 1,101.32 kms