AV 2183 then B6 1234 at San Francisco
Vancouver → San Francisco → Boston
Timetable, San Francisco time
15:27AV 2183 from Vancouver at the gate
14:50B6 1234 to Boston leaves the gate
23 h 23 apart on the timetable, overnight
B6 1234 leaves 23 h 23 after AV 2183 arrives on the timetable: more than half a day, so not a connection we count.