AS 725 then B6 134 at San Francisco
Seattle → San Francisco → Boston
Timetable, San Francisco time
09:41AS 725 from Seattle at the gatealso QR 2163, QR 2973, CX 7865, QR 8864
22:10B6 134 to Boston leaves the gatealso SQ 1544, EY 8386
12 h 29 apart on the timetable
B6 134 leaves 12 h 29 after AS 725 arrives on the timetable: more than half a day, so not a connection we count.