UA 2838 then CA 1020 at O'Hare
New York LaGuardia → Chicago → Shanghai
Timetable, Chicago time
20:08UA 2838 from New York LaGuardia at the gate
19:30CA 1020 to Shanghai leaves the gate
23 h 22 apart on the timetable, overnight
CA 1020 leaves 23 h 22 after UA 2838 arrives on the timetable: more than half a day, so not a connection we count.