DL 5603 then DL 5679 at Boston
Madison → Boston → Louisville
Timetable, Boston time
18:52DL 5603 from Madison at the gate
09:55DL 5679 to Louisville leaves the gate
15 h 03 apart on the timetable, overnight
DL 5679 leaves 15 h 03 after DL 5603 arrives on the timetable: more than half a day, so not a connection we count.