AA 2745 then Y8 7456 at O'Hare
Las Vegas → Chicago → Shanghai
Timetable, Chicago time
23:35AA 2745 from Las Vegas at the gate
19:10Y8 7456 to Shanghai leaves the gate
19 h 35 apart on the timetable, overnight
Y8 7456 leaves 19 h 35 after AA 2745 arrives on the timetable: more than half a day, so not a connection we count.