AA 2819 then CZ 438 at O'Hare
New York JFK → Chicago → Shanghai
Timetable, Chicago time
09:30AA 2819 from New York JFK at the gate
01:45CZ 438 to Shanghai leaves the gate
16 h 15 apart on the timetable, overnight
CZ 438 leaves 16 h 15 after AA 2819 arrives on the timetable: more than half a day, so not a connection we count.