There are
1,103 mi
from Hereford, TX to Mt Prospect, IL
That's the driving distance. It would take 19 hours 49 mins to go from Hereford, Texas to Mt Prospect, Illinois.
The flight distance (direct flight from Hereford, TX to Mt Prospect, IL) is 927.26 mi.
1,103 mi = 1,774.62 kms