There are
954 mi
from Hereford, TX to Clearfield, UT
That's the driving distance. It would take 16 hours 49 mins to go from Hereford, Texas to Clearfield, Utah.
The flight distance (direct flight from Hereford, TX to Clearfield, UT) is 680.63 mi.
954 mi = 1,535.70 kms