There are
922 mi
from Flower Mound, TX to Elgin, IL
That's the driving distance. It would take 17 hours 36 mins to go from Flower Mound, Texas to Elgin, Illinois.
The flight distance (direct flight from Flower Mound, TX to Elgin, IL) is 787.71 mi.
922 mi = 1,483.91 kms