DL 5641 then DL 5644 at Boston
Cleveland → Boston → Baltimore
Timetable, Boston time
19:35DL 5641 from Cleveland at the gate
16:05DL 5644 to Baltimore leaves the gate
20 h 30 apart on the timetable, overnight
DL 5644 leaves 20 h 30 after DL 5641 arrives on the timetable: more than half a day, so not a connection we count.