UA 1579 then CA 8412 at O'Hare
New York LaGuardia → Chicago → Shanghai
Timetable, Chicago time
23:21UA 1579 from New York LaGuardia at the gate
21:30CA 8412 to Shanghai leaves the gate
22 h 09 apart on the timetable, overnight
CA 8412 leaves 22 h 09 after UA 1579 arrives on the timetable: more than half a day, so not a connection we count.