AA 1317 then CA 3174 at O'Hare
Denver → Chicago → Guangzhou
Timetable, Chicago time
21:50AA 1317 from Denver at the gate
13:40CA 3174 to Guangzhou leaves the gate
15 h 50 apart on the timetable, overnight
CA 3174 leaves 15 h 50 after AA 1317 arrives on the timetable: more than half a day, so not a connection we count.