AA 4649 then G7 3376 at O'Hare
Pittsburgh → Chicago → St Louis
Timetable, Chicago time
11:03AA 4649 from Pittsburgh at the gate
11:00G7 3376 to St Louis leaves the gate
23 h 57 apart on the timetable, overnight
G7 3376 leaves 23 h 57 after AA 4649 arrives on the timetable: more than half a day, so not a connection we count.