AA 2501 then Y8 7456 at O'Hare
Newark → Chicago → Shanghai
Timetable, Chicago time
08:44AA 2501 from Newark at the gate
01:35Y8 7456 to Shanghai leaves the gate
16 h 51 apart on the timetable, overnight
Y8 7456 leaves 16 h 51 after AA 2501 arrives on the timetable: more than half a day, so not a connection we count.