There are
913 mi
from Flower Mound, TX to La Grange, IL
That's the driving distance. It would take 17 hours 8 mins to go from Flower Mound, Texas to La Grange, Illinois.
The flight distance (direct flight from Flower Mound, TX to La Grange, IL) is 789.79 mi.
913 mi = 1,469.58 kms