AA 1225 then AA 3446 at Boston
Miami (MIA) → Boston → Louisville
Timetable, Boston time
14:10AA 1225 from Miami (MIA) at the gate
14:00AA 3446 to Louisville leaves the gate
23 h 50 apart on the timetable, overnight
AA 3446 leaves 23 h 50 after AA 1225 arrives on the timetable: more than half a day, so not a connection we count.