There are
1,605 mi
from Sioux City, IA to Rancho Santa Margarita, CA
That's the driving distance. It would take 1 day 4 hours to go from Sioux City, Iowa to Rancho Santa Margarita, California.
The flight distance (direct flight from Sioux City, IA to Rancho Santa Margarita, CA) is 1,300.54 mi.
1,605 mi = 1.61 kms