There are
910 mi
from Lewisville, TX to South Elgin, IL
That's the driving distance. It would take 17 hours 15 mins to go from Lewisville, Texas to South Elgin, Illinois.
The flight distance (direct flight from Lewisville, TX to South Elgin, IL) is 779.87 mi.
910 mi = 1,464.63 kms