There are
1,113 mi
from Hereford, TX to Mundelein, IL
That's the driving distance. It would take 20 hours 3 mins to go from Hereford, Texas to Mundelein, Illinois.
The flight distance (direct flight from Hereford, TX to Mundelein, IL) is 930.72 mi.
1,113 mi = 1,791.95 kms