AA 4483 then G7 3376 at O'Hare
Baltimore → Chicago → St Louis
Timetable, Chicago time
13:18AA 4483 from Baltimore at the gate
11:00G7 3376 to St Louis leaves the gate
21 h 42 apart on the timetable, overnight
G7 3376 leaves 21 h 42 after AA 4483 arrives on the timetable: more than half a day, so not a connection we count.