DL 2648 then DL 5679 at Boston
Detroit → Boston → Louisville
Timetable, Boston time
11:53DL 2648 from Detroit at the gate
09:55DL 5679 to Louisville leaves the gate
22 h 02 apart on the timetable, overnight
DL 5679 leaves 22 h 02 after DL 2648 arrives on the timetable: more than half a day, so not a connection we count.