UA 1579 then CA 1020 at O'Hare
New York LaGuardia → Chicago → Shanghai
Timetable, Chicago time
23:21UA 1579 from New York LaGuardia at the gate
19:30CA 1020 to Shanghai leaves the gate
20 h 09 apart on the timetable, overnight
CA 1020 leaves 20 h 09 after UA 1579 arrives on the timetable: more than half a day, so not a connection we count.