There are
921 mi
from Flower Mound, TX to Glendale Heights, IL
That's the driving distance. It would take 17 hours 18 mins to go from Flower Mound, Texas to Glendale Heights, Illinois.
The flight distance (direct flight from Flower Mound, TX to Glendale Heights, IL) is 788.45 mi.
921 mi = 1,481.77 kms