AA 2202 then G7 3376 at O'Hare
Buffalo → Chicago → St Louis
Timetable, Chicago time
20:00AA 2202 from Buffalo at the gate
11:00G7 3376 to St Louis leaves the gate
15 h apart on the timetable, overnight
G7 3376 leaves 15 h after AA 2202 arrives on the timetable: more than half a day, so not a connection we count.