UA 958 then CA 8414 at O'Hare
London → Chicago → Shanghai
Timetable, Chicago time
10:45UA 958 from London at the gate
23:15CA 8414 to Shanghai leaves the gate
12 h 30 apart on the timetable
CA 8414 leaves 12 h 30 after UA 958 arrives on the timetable: more than half a day, so not a connection we count.