AA 3290 then AA 3748 at Boston
Philadelphia → Boston → Washington National
Timetable, Boston time
17:56AA 3290 from Philadelphia at the gate
07:30AA 3748 to Washington National leaves the gate
13 h 34 apart on the timetable, overnight
AA 3748 leaves 13 h 34 after AA 3290 arrives on the timetable: more than half a day, so not a connection we count.