SQ 1460 then BA 7543 at San Francisco
New York JFK → San Francisco → Seattle
Timetable, San Francisco time
21:37SQ 1460 from New York JFK at the gate
15:08BA 7543 to Seattle leaves the gatealso QR 8897
17 h 31 apart on the timetable, overnight
BA 7543 leaves 17 h 31 after SQ 1460 arrives on the timetable: more than half a day, so not a connection we count.