There are
502 mi
from Sioux City, IA to Siloam Springs, AR
That's the driving distance. It would take 9 hours 25 mins to go from Sioux City, Iowa to Siloam Springs, Arkansas.
The flight distance (direct flight from Sioux City, IA to Siloam Springs, AR) is 447.26 mi.
502 mi = 808.53 kms