NH 8421 then CX 451 at Narita
Chicago → Tokyo → Taipei
Timetable, Tokyo time
18:38NH 8421 from Chicago at the gate
15:30CX 451 to Taipei leaves the gate
20 h 52 apart on the timetable, overnight
CX 451 leaves 20 h 52 after NH 8421 arrives on the timetable: more than half a day, so not a connection we count.