There are
1,726 mi
from Sioux City, IA to Lompoc, CA
That's the driving distance. It would take 1 day 7 hours to go from Sioux City, Iowa to Lompoc, California.
The flight distance (direct flight from Sioux City, IA to Lompoc, CA) is 1,402.34 mi.
1,726 mi = 2,777.08 kms