There are
420 mi
from Sioux City, IA to Winfield, KS
That's the driving distance. It would take 7 hours 54 mins to go from Sioux City, Iowa to Winfield, Kansas.
The flight distance (direct flight from Sioux City, IA to Winfield, KS) is 364.82 mi.
420 mi = 676.00 kms