AA 3673 then Y8 7456 at O'Hare
Omaha → Chicago → Shanghai
Timetable, Chicago time
10:30AA 3673 from Omaha at the gate
01:35Y8 7456 to Shanghai leaves the gate
15 h 05 apart on the timetable, overnight
Y8 7456 leaves 15 h 05 after AA 3673 arrives on the timetable: more than half a day, so not a connection we count.