DL 1697 then DL 5731 at Boston
Phoenix → Boston → Pittsburgh
Timetable, Boston time
21:00DL 1697 from Phoenix at the gate
12:10DL 5731 to Pittsburgh leaves the gate
15 h 10 apart on the timetable, overnight
DL 5731 leaves 15 h 10 after DL 1697 arrives on the timetable: more than half a day, so not a connection we count.