UA 928 then CA 8414 at O'Hare
London → Chicago → Shanghai
Timetable, Chicago time
16:55UA 928 from London at the gate
08:10CA 8414 to Shanghai leaves the gate
15 h 15 apart on the timetable, overnight
CA 8414 leaves 15 h 15 after UA 928 arrives on the timetable: more than half a day, so not a connection we count.