AA 9977 then AA 2404 at Philadelphia
Cleveland → Philadelphia → Boston
Timetable, Philadelphia time
23:17AA 9977 from Cleveland at the gate
17:31AA 2404 to Boston leaves the gate
18 h 14 apart on the timetable, overnight
AA 2404 leaves 18 h 14 after AA 9977 arrives on the timetable: more than half a day, so not a connection we count.