AA 4643 then AA 3484 at O'Hare
Norfolk → Chicago → St Louis
Timetable, Chicago time
13:52AA 4643 from Norfolk at the gate
09:30AA 3484 to St Louis leaves the gate
19 h 38 apart on the timetable, overnight
AA 3484 leaves 19 h 38 after AA 4643 arrives on the timetable: more than half a day, so not a connection we count.