AA 3247 then DL 5679 at Boston
Miami → Boston → Louisville
Timetable, Boston time
13:23AA 3247 from Miami at the gate
09:55DL 5679 to Louisville leaves the gate
20 h 32 apart on the timetable, overnight
DL 5679 leaves 20 h 32 after AA 3247 arrives on the timetable: more than half a day, so not a connection we count.