DL 5680 then AA 1779 at Boston
Pittsburgh → Boston → Washington National
Timetable, Boston time
20:47DL 5680 from Pittsburgh at the gate
19:58AA 1779 to Washington National leaves the gate
23 h 11 apart on the timetable, overnight
AA 1779 leaves 23 h 11 after DL 5680 arrives on the timetable: more than half a day, so not a connection we count.