AA 4102 then G7 3376 at O'Hare
Denver → Chicago → St Louis
Timetable, Chicago time
12:55AA 4102 from Denver at the gate
11:00G7 3376 to St Louis leaves the gate
22 h 05 apart on the timetable, overnight
G7 3376 leaves 22 h 05 after AA 4102 arrives on the timetable: more than half a day, so not a connection we count.