There are
1,022 mi
from Sioux City, IA to Alvin, TX
That's the driving distance. It would take 18 hours 21 mins to go from Sioux City, Iowa to Alvin, Texas.
The flight distance (direct flight from Sioux City, IA to Alvin, TX) is 905.76 mi.
1,022 mi = 1.61 kms