AA 6284 then AA 3484 at O'Hare
Des Moines → Chicago → St Louis
Timetable, Chicago time
11:10AA 6284 from Des Moines at the gate
09:30AA 3484 to St Louis leaves the gate
22 h 20 apart on the timetable, overnight
AA 3484 leaves 22 h 20 after AA 6284 arrives on the timetable: more than half a day, so not a connection we count.