AV 2351 then B6 134 at San Francisco
Denver → San Francisco → Boston
Timetable, San Francisco time
23:09AV 2351 from Denver at the gate
22:10B6 134 to Boston leaves the gatealso SQ 1544, EY 8386
23 h 01 apart on the timetable, overnight
B6 134 leaves 23 h 01 after AV 2351 arrives on the timetable: more than half a day, so not a connection we count.