SQ 1543 then BA 2947 at San Francisco
New York JFK → San Francisco → Seattle
Timetable, San Francisco time
19:31SQ 1543 from New York JFK at the gate
18:48BA 2947 to Seattle leaves the gate
23 h 17 apart on the timetable, overnight
BA 2947 leaves 23 h 17 after SQ 1543 arrives on the timetable: more than half a day, so not a connection we count.