AA 2672 then K4 556 at O'Hare
Seattle (SEA) → Chicago → Tokyo Narita
Timetable, Chicago time
23:45AA 2672 from Seattle (SEA) at the gate
16:00K4 556 to Tokyo Narita leaves the gate
16 h 15 apart on the timetable, overnight
K4 556 leaves 16 h 15 after AA 2672 arrives on the timetable: more than half a day, so not a connection we count.