There are
814 mi
from Lewisville, TX to Radcliff, KY
That's the driving distance. It would take 14 hours 36 mins to go from Lewisville, Texas to Radcliff, Kentucky.
The flight distance (direct flight from Lewisville, TX to Radcliff, KY) is 703.77 mi.
814 mi = 1,310.55 kms