AA 3248 then DL 5845 at Philadelphia
Pittsburgh → Philadelphia → Boston
Timetable, Philadelphia time
09:44AA 3248 from Pittsburgh at the gate
09:00DL 5845 to Boston leaves the gate
23 h 16 apart on the timetable, overnight
DL 5845 leaves 23 h 16 after AA 3248 arrives on the timetable: more than half a day, so not a connection we count.