There are
1,704 mi
from Modesto, CA to Sioux City, IA
That's the driving distance. It would take 1 day 5 hours to go from Modesto, California to Sioux City, Iowa.
The flight distance (direct flight from Modesto, CA to Sioux City, IA) is 1,337.98 mi.
1,704 mi = 1.61 kms