AA 2386 then CZ 438 at O'Hare
Philadelphia → Chicago → Shanghai
Timetable, Chicago time
07:25AA 2386 from Philadelphia at the gate
01:45CZ 438 to Shanghai leaves the gate
18 h 20 apart on the timetable, overnight
CZ 438 leaves 18 h 20 after AA 2386 arrives on the timetable: more than half a day, so not a connection we count.