There are
954 mi
from Hereford, TX to Waterloo, IA
That's the driving distance. It would take 17 hours 5 mins to go from Hereford, Texas to Waterloo, Iowa.
The flight distance (direct flight from Hereford, TX to Waterloo, IA) is 757.74 mi.
954 mi = 1,535.52 kms