DL 5641 then B6 1187 at Boston
Cleveland → Boston → Los Angeles
Timetable, Boston time
19:35DL 5641 from Cleveland at the gate
15:45B6 1187 to Los Angeles leaves the gate
20 h 10 apart on the timetable, overnight
B6 1187 leaves 20 h 10 after DL 5641 arrives on the timetable: more than half a day, so not a connection we count.