AA 671 then AA 3484 at O'Hare
Dallas-Fort Worth → Chicago → St Louis
Timetable, Chicago time
11:02AA 671 from Dallas-Fort Worth at the gate
09:30AA 3484 to St Louis leaves the gate
22 h 28 apart on the timetable, overnight
AA 3484 leaves 22 h 28 after AA 671 arrives on the timetable: more than half a day, so not a connection we count.