UA 1237 then K4 550 at O'Hare
Minneapolis → Chicago → Tokyo Narita
Timetable, Chicago time
20:21UA 1237 from Minneapolis at the gate
18:00K4 550 to Tokyo Narita leaves the gate
21 h 39 apart on the timetable, overnight
K4 550 leaves 21 h 39 after UA 1237 arrives on the timetable: more than half a day, so not a connection we count.