DL 5598 then DL 5679 at Boston
Cincinnati → Boston → Louisville
Timetable, Boston time
16:57DL 5598 from Cincinnati at the gate
09:55DL 5679 to Louisville leaves the gate
16 h 58 apart on the timetable, overnight
DL 5679 leaves 16 h 58 after DL 5598 arrives on the timetable: more than half a day, so not a connection we count.