AA 2473 then KJ 2811 at LAX
Boston → Los Angeles → Seoul
Timetable, Los Angeles time
14:17AA 2473 from Boston at the gate
10:40KJ 2811 to Seoul leaves the gate
20 h 23 apart on the timetable, overnight
KJ 2811 leaves 20 h 23 after AA 2473 arrives on the timetable: more than half a day, so not a connection we count.