NH 8421 then AC 4 at Narita
Chicago → Tokyo → Vancouver
Timetable, Tokyo time
18:38NH 8421 from Chicago at the gate
18:15AC 4 to Vancouver leaves the gate
23 h 37 apart on the timetable, overnight
AC 4 leaves 23 h 37 after NH 8421 arrives on the timetable: more than half a day, so not a connection we count.