DL 5641 then B6 2459 at Boston
Cleveland → Boston → Philadelphia
Timetable, Boston time
19:35DL 5641 from Cleveland at the gate
15:33B6 2459 to Philadelphia leaves the gate
19 h 58 apart on the timetable, overnight
B6 2459 leaves 19 h 58 after DL 5641 arrives on the timetable: more than half a day, so not a connection we count.