UA 435 then DL 4087 at LAX
Washington → Los Angeles → San Diego
Timetable, Los Angeles time
17:48UA 435 from Washington at the gate
17:46DL 4087 to San Diego leaves the gate
23 h 58 apart on the timetable, overnight
DL 4087 leaves 23 h 58 after UA 435 arrives on the timetable: more than half a day, so not a connection we count.