There are
765 mi
from Sioux City, IA to Longview, TX
That's the driving distance. It would take 14 hours 47 mins to go from Sioux City, Iowa to Longview, Texas.
The flight distance (direct flight from Sioux City, IA to Longview, TX) is 696.81 mi.
765 mi = 1,230.87 kms