AA 764 then G7 3376 at O'Hare
Houston → Chicago → St Louis
Timetable, Chicago time
11:58AA 764 from Houston at the gate
11:00G7 3376 to St Louis leaves the gate
23 h 02 apart on the timetable, overnight
G7 3376 leaves 23 h 02 after AA 764 arrives on the timetable: more than half a day, so not a connection we count.