There are
298 mi
from Flower Mound, TX to Seabrook, TX
That's the driving distance. It would take 5 hours 30 mins to go from Flower Mound, Texas to Seabrook, Texas.
The flight distance (direct flight from Flower Mound, TX to Seabrook, TX) is 267.93 mi.
298 mi = 480.32 kms