There are
514 mi
from Sioux City, IA to Ballwin, MO
That's the driving distance. It would take 9 hours 37 mins to go from Sioux City, Iowa to Ballwin, Missouri.
The flight distance (direct flight from Sioux City, IA to Ballwin, MO) is 408.79 mi.
514 mi = 826.91 kms