AA 2570 then Y8 7456 at O'Hare
Salt Lake City → Chicago → Shanghai
Timetable, Chicago time
21:55AA 2570 from Salt Lake City at the gate
19:10Y8 7456 to Shanghai leaves the gate
21 h 15 apart on the timetable, overnight
Y8 7456 leaves 21 h 15 after AA 2570 arrives on the timetable: more than half a day, so not a connection we count.