AA 4455 then DL 5845 at Boston
Washington National → Boston → Philadelphia
Timetable, Boston time
07:46AA 4455 from Washington National at the gate
07:25DL 5845 to Philadelphia leaves the gate
23 h 39 apart on the timetable, overnight
DL 5845 leaves 23 h 39 after AA 4455 arrives on the timetable: more than half a day, so not a connection we count.