AA 2690 then KJ 281 at LAX
Las Vegas → Los Angeles → Seoul
Timetable, Los Angeles time
08:35AA 2690 from Las Vegas at the gate
21:05KJ 281 to Seoul leaves the gate
12 h 30 apart on the timetable
KJ 281 leaves 12 h 30 after AA 2690 arrives on the timetable: more than half a day, so not a connection we count.