DL 459 then DL 5679 at Boston
Seattle → Boston → Louisville
Timetable, Boston time
16:00DL 459 from Seattle at the gate
09:55DL 5679 to Louisville leaves the gate
17 h 55 apart on the timetable, overnight
DL 5679 leaves 17 h 55 after DL 459 arrives on the timetable: more than half a day, so not a connection we count.