There are
657 mi
from Flower Mound, TX to Lexington, NE
That's the driving distance. It would take 12 hours 4 mins to go from Flower Mound, Texas to Lexington, Nebraska.
The flight distance (direct flight from Flower Mound, TX to Lexington, NE) is 555.65 mi.
657 mi = 1,057.38 kms