AA 3347 then DL 5714 at Boston
Buffalo → Boston → Philadelphia
Timetable, Boston time
17:50AA 3347 from Buffalo at the gate
17:25DL 5714 to Philadelphia leaves the gate
23 h 35 apart on the timetable, overnight
DL 5714 leaves 23 h 35 after AA 3347 arrives on the timetable: more than half a day, so not a connection we count.