B6 1534 then DL 5716 at Boston
San Francisco → Boston → New York LaGuardia
Timetable, Boston time
06:44B6 1534 from San Francisco at the gate
19:00DL 5716 to New York LaGuardia leaves the gate
12 h 16 apart on the timetable
DL 5716 leaves 12 h 16 after B6 1534 arrives on the timetable: more than half a day, so not a connection we count.