DL 1953 then DL 5679 at Boston
Fort Lauderdale → Boston → Louisville
Timetable, Boston time
14:35DL 1953 from Fort Lauderdale at the gate
10:25DL 5679 to Louisville leaves the gate
19 h 50 apart on the timetable, overnight
DL 5679 leaves 19 h 50 after DL 1953 arrives on the timetable: more than half a day, so not a connection we count.