10400DLDüsseldorf Flughafen51.22 14. 72557IASioux Gateway Airport42.40 7. 72548IAWaterloo Regional Airport42.55 7. x1174IAClinton Municipal Airport41.83 6. 72547IADubuque Regional Airport42.40 6. 72546IADes Moines Intl. Airport41.53 12. 72549IAFort Dodge Regional Airport42.55 8.