There are
933 mi
from Flower Mound, TX to Mt Prospect, IL
That's the driving distance. It would take 17 hours 36 mins to go from Flower Mound, Texas to Mt Prospect, Illinois.
The flight distance (direct flight from Flower Mound, TX to Mt Prospect, IL) is 800.82 mi.
933 mi = 1,502.21 kms