DL 514 then AA 2516 at Phoenix
Boston → Phoenix → Pittsburgh
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
16:49AA 2516 to Pittsburgh leaves the gate
18 h 56 apart on the timetable, overnight
AA 2516 leaves 18 h 56 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.