OO 6058 then NH 8421 at O'Hare
Sioux City → Chicago → Tokyo Narita
Timetable, Chicago time
10:13OO 6058 from Sioux City at the gate
09:15NH 8421 to Tokyo Narita leaves the gate
23 h 02 apart on the timetable, overnight
NH 8421 leaves 23 h 02 after OO 6058 arrives on the timetable: more than half a day, so not a connection we count.