UA 2672 then K4 538 at O'Hare
Hartford → Chicago → Seoul
Timetable, Chicago time
07:51UA 2672 from Hartford at the gate
01:45K4 538 to Seoul leaves the gate
17 h 54 apart on the timetable, overnight
K4 538 leaves 17 h 54 after UA 2672 arrives on the timetable: more than half a day, so not a connection we count.