DL 5641 then DL 58 at Boston
Cleveland → Boston → London
Timetable, Boston time
20:00DL 5641 from Cleveland at the gate
19:15DL 58 to London leaves the gate
23 h 15 apart on the timetable, overnight
DL 58 leaves 23 h 15 after DL 5641 arrives on the timetable: more than half a day, so not a connection we count.