AA 1366 then DL 5875 at Boston
Dallas-Fort Worth → Boston → Pittsburgh
Timetable, Boston time
23:55AA 1366 from Dallas-Fort Worth at the gate
15:00DL 5875 to Pittsburgh leaves the gate
15 h 05 apart on the timetable, overnight
DL 5875 leaves 15 h 05 after AA 1366 arrives on the timetable: more than half a day, so not a connection we count.