SQ 1539 then AS 1327 at San Francisco
Boston → San Francisco → Seattle
Timetable, San Francisco time
09:40SQ 1539 from Boston at the gate
08:33AS 1327 to Seattle leaves the gatealso DE 5053, FI 7714, CX 7998, QR 8802
22 h 53 apart on the timetable, overnight
AS 1327 leaves 22 h 53 after SQ 1539 arrives on the timetable: more than half a day, so not a connection we count.