There are
707 mi
from Temecula, CA to Farmington, UT
That's the driving distance. It would take 12 hours 19 mins to go from Temecula, California to Farmington, Utah.
The flight distance (direct flight from Temecula, CA to Farmington, UT) is 592.45 mi.
707 mi = 1,138.17 kms