There are
670 mi
from Rialto, CA to Clearfield, UT
That's the driving distance. It would take 11 hours 39 mins to go from Rialto, California to Clearfield, Utah.
The flight distance (direct flight from Rialto, CA to Clearfield, UT) is 565.20 mi.
670 mi = 1,079.03 kms