There are
764 mi
from Longview, TX to Sioux City, IA
That's the driving distance. It would take 14 hours 46 mins to go from Longview, Texas to Sioux City, Iowa.
The flight distance (direct flight from Longview, TX to Sioux City, IA) is 696.81 mi.
764 mi = 1,230.26 kms