DL 1780 then DL 5679 at Boston
San Juan → Boston → Louisville
Timetable, Boston time
18:11DL 1780 from San Juan at the gate
09:55DL 5679 to Louisville leaves the gate
15 h 44 apart on the timetable, overnight
DL 5679 leaves 15 h 44 after DL 1780 arrives on the timetable: more than half a day, so not a connection we count.