UA 3884 then CA 8412 at O'Hare
Melbourne (Florida) → Chicago → Shanghai
Timetable, Chicago time
01:06UA 3884 from Melbourne (Florida) at the gate
21:30CA 8412 to Shanghai leaves the gate
20 h 24 apart on the timetable
CA 8412 leaves 20 h 24 after UA 3884 arrives on the timetable: more than half a day, so not a connection we count.