There are
398 mi
from Rancho Cucamonga, CA to Cedar City, UT
That's the driving distance. It would take 7 hours 5 mins to go from Rancho Cucamonga, California to Cedar City, Utah.
The flight distance (direct flight from Rancho Cucamonga, CA to Cedar City, UT) is 353.75 mi.
398 mi = 639.92 kms