AV 2104 then SQ 1550 at San Francisco
San Luis Obispo → San Francisco → Boston
Timetable, San Francisco time
19:56AV 2104 from San Luis Obispo at the gate
10:44SQ 1550 to Boston leaves the gate
14 h 48 apart on the timetable, overnight
SQ 1550 leaves 14 h 48 after AV 2104 arrives on the timetable: more than half a day, so not a connection we count.