There are
1,217 mi
from Flint, MI to Duncanville, TX
That's the driving distance. It would take 21 hours 36 mins to go from Flint, Michigan to Duncanville, Texas.
The flight distance (direct flight from Flint, MI to Duncanville, TX) is 1,013.95 mi.
1,217 mi = 1.61 kms