IB 345 then DL 5714 at Boston
Madrid → Boston → Philadelphia
Timetable, Boston time
18:00IB 345 from Madrid at the gate
17:25DL 5714 to Philadelphia leaves the gate
23 h 25 apart on the timetable, overnight
DL 5714 leaves 23 h 25 after IB 345 arrives on the timetable: more than half a day, so not a connection we count.