AV 2104 then B6 1234 at San Francisco
San Luis Obispo → San Francisco → Boston
Timetable, San Francisco time
19:56AV 2104 from San Luis Obispo at the gate
14:50B6 1234 to Boston leaves the gate
18 h 54 apart on the timetable, overnight
B6 1234 leaves 18 h 54 after AV 2104 arrives on the timetable: more than half a day, so not a connection we count.