DL 675 then DL 5679 at Boston
Kansas City → Boston → Louisville
Timetable, Boston time
13:55DL 675 from Kansas City at the gate
09:55DL 5679 to Louisville leaves the gate
20 h apart on the timetable, overnight
DL 5679 leaves 20 h after DL 675 arrives on the timetable: more than half a day, so not a connection we count.