SQ 1543 then VA 8546 at San Francisco
New York JFK → San Francisco → Los Angeles
Timetable, San Francisco time
13:40SQ 1543 from New York JFK at the gate
05:50VA 8546 to Los Angeles leaves the gate
16 h 10 apart on the timetable, overnight
VA 8546 leaves 16 h 10 after SQ 1543 arrives on the timetable: more than half a day, so not a connection we count.