K4 556 then ZG 53 at Narita
Chicago → Tokyo → Singapore
Timetable, Tokyo time
21:48K4 556 from Chicago at the gate
16:40ZG 53 to Singapore leaves the gate
18 h 52 apart on the timetable, overnight
ZG 53 leaves 18 h 52 after K4 556 arrives on the timetable: more than half a day, so not a connection we count.