AA 4401 then UA 8130 at O'Hare
Norfolk → Chicago → Sioux Falls
Timetable, Chicago time
08:00AA 4401 from Norfolk at the gate
20:30UA 8130 to Sioux Falls leaves the gate
12 h 30 apart on the timetable
UA 8130 leaves 12 h 30 after AA 4401 arrives on the timetable: more than half a day, so not a connection we count.