K4 550 then JL 873 at Narita
Chicago → Tokyo → Shanghai
Timetable, Tokyo time
11:59K4 550 from Chicago at the gate
09:35JL 873 to Shanghai leaves the gate
21 h 36 apart on the timetable, overnight
JL 873 leaves 21 h 36 after K4 550 arrives on the timetable: more than half a day, so not a connection we count.