AA 3580 then G7 3376 at O'Hare
Louisville → Chicago → St Louis
Timetable, Chicago time
13:30AA 3580 from Louisville at the gate
11:00G7 3376 to St Louis leaves the gate
21 h 30 apart on the timetable, overnight
G7 3376 leaves 21 h 30 after AA 3580 arrives on the timetable: more than half a day, so not a connection we count.