AA 6345 then G7 3376 at O'Hare
Lexington → Chicago → St Louis
Timetable, Chicago time
11:59AA 6345 from Lexington at the gate
11:00G7 3376 to St Louis leaves the gate
23 h 01 apart on the timetable, overnight
G7 3376 leaves 23 h 01 after AA 6345 arrives on the timetable: more than half a day, so not a connection we count.