DL 5598 then DL 508 at Boston
Cincinnati → Boston → Los Angeles
Timetable, Boston time
16:57DL 5598 from Cincinnati at the gate
16:15DL 508 to Los Angeles leaves the gate
23 h 18 apart on the timetable, overnight
DL 508 leaves 23 h 18 after DL 5598 arrives on the timetable: more than half a day, so not a connection we count.