There are
1,603 mi
from Lake Forest, CA to Sioux City, IA
That's the driving distance. It would take 1 day 4 hours to go from Lake Forest, California to Sioux City, Iowa.
The flight distance (direct flight from Lake Forest, CA to Sioux City, IA) is 1,304.40 mi.
1,603 mi = 1.61 kms