B6 1154 then DL 5679 at Boston
Washington National → Boston → Louisville
Timetable, Boston time
18:04B6 1154 from Washington National at the gate
09:55DL 5679 to Louisville leaves the gate
15 h 51 apart on the timetable, overnight
DL 5679 leaves 15 h 51 after B6 1154 arrives on the timetable: more than half a day, so not a connection we count.