JU 8510 then Y4 2484 at San Francisco
New York JFK → San Francisco → Los Angeles
Timetable, San Francisco time
23:54JU 8510 from New York JFK at the gate
21:27Y4 2484 to Los Angeles leaves the gatealso F9 2858
21 h 33 apart on the timetable, overnight
Y4 2484 leaves 21 h 33 after JU 8510 arrives on the timetable: more than half a day, so not a connection we count.