There are
758 mi
from Garland, TX to South Sioux City, NE
That's the driving distance. It would take 13 hours 35 mins to go from Garland, Texas to South Sioux City, Nebraska.
The flight distance (direct flight from Garland, TX to South Sioux City, NE) is 660.19 mi.
758 mi = 1,220.48 kms