AA 9911 then UA 2403 at O'Hare
Des Moines → Chicago → Savannah
Timetable, Chicago time
19:30AA 9911 from Des Moines at the gate
17:59UA 2403 to Savannah leaves the gate
22 h 29 apart on the timetable, overnight
UA 2403 leaves 22 h 29 after AA 9911 arrives on the timetable: more than half a day, so not a connection we count.