AA 5841 then DL 5714 at Philadelphia
Harrisburg → Philadelphia → Boston
Timetable, Philadelphia time
08:45AA 5841 from Harrisburg at the gate
20:50DL 5714 to Boston leaves the gate
12 h 05 apart on the timetable
DL 5714 leaves 12 h 05 after AA 5841 arrives on the timetable: more than half a day, so not a connection we count.