UA 3902 then CA 8444 at O'Hare
Rio De Janeiro → Chicago → Shanghai
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
11:30CA 8444 to Shanghai leaves the gate
18 h 29 apart on the timetable, overnight
CA 8444 leaves 18 h 29 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.