AA 2278 then CA 3174 at O'Hare
Puerto Vallarta → Chicago → Guangzhou
Timetable, Chicago time
21:00AA 2278 from Puerto Vallarta at the gate
13:40CA 3174 to Guangzhou leaves the gate
16 h 40 apart on the timetable, overnight
CA 3174 leaves 16 h 40 after AA 2278 arrives on the timetable: more than half a day, so not a connection we count.