UA 580 then KJ 2811 at LAX
San Francisco → Los Angeles → Seoul
Timetable, Los Angeles time
23:00UA 580 from San Francisco at the gate
14:20KJ 2811 to Seoul leaves the gate
15 h 20 apart on the timetable, overnight
KJ 2811 leaves 15 h 20 after UA 580 arrives on the timetable: more than half a day, so not a connection we count.