There are
686 mi
from Irvine, CA to Salt Lake City, UT
That's the driving distance. It would take 12 hours 1 min to go from Irvine, California to Salt Lake City, Utah.
The flight distance (direct flight from Irvine, CA to Salt Lake City, UT) is 586.69 mi.
686 mi = 1,103.28 kms