AA 215 then G7 3376 at O'Hare
Cancún → Chicago → St Louis
Timetable, Chicago time
17:40AA 215 from Cancún at the gate
11:00G7 3376 to St Louis leaves the gate
17 h 20 apart on the timetable, overnight
G7 3376 leaves 17 h 20 after AA 215 arrives on the timetable: more than half a day, so not a connection we count.