AA 2416 then CA 3174 at O'Hare
Houston → Chicago → Guangzhou
Timetable, Chicago time
21:49AA 2416 from Houston at the gate
13:40CA 3174 to Guangzhou leaves the gate
15 h 51 apart on the timetable, overnight
CA 3174 leaves 15 h 51 after AA 2416 arrives on the timetable: more than half a day, so not a connection we count.