AA 1668 then Y8 7456 at O'Hare
Dallas-Fort Worth → Chicago → Shanghai
Timetable, Chicago time
23:15AA 1668 from Dallas-Fort Worth at the gate
19:10Y8 7456 to Shanghai leaves the gate
19 h 55 apart on the timetable, overnight
Y8 7456 leaves 19 h 55 after AA 1668 arrives on the timetable: more than half a day, so not a connection we count.