AA 3308 then DL 5622 at Boston
Philadelphia → Boston → Richmond
Timetable, Boston time
09:04AA 3308 from Philadelphia at the gate
08:47DL 5622 to Richmond leaves the gate
23 h 43 apart on the timetable, overnight
DL 5622 leaves 23 h 43 after AA 3308 arrives on the timetable: more than half a day, so not a connection we count.