There are
1,045 mi
from Flower Mound, TX to Portage, MI
That's the driving distance. It would take 19 hours 35 mins to go from Flower Mound, Texas to Portage, Michigan.
The flight distance (direct flight from Flower Mound, TX to Portage, MI) is 892.98 mi.
1,045 mi = 1.61 kms