AA 2304 then DL 5845 at Philadelphia
Nashville → Philadelphia → Boston
Timetable, Philadelphia time
09:04AA 2304 from Nashville at the gate
09:00DL 5845 to Boston leaves the gate
23 h 56 apart on the timetable, overnight
DL 5845 leaves 23 h 56 after AA 2304 arrives on the timetable: more than half a day, so not a connection we count.