DL 865 then DL 5875 at Boston
Atlanta → Boston → Pittsburgh
Timetable, Boston time
01:08DL 865 from Atlanta at the gate
15:00DL 5875 to Pittsburgh leaves the gate
13 h 52 apart on the timetable
DL 5875 leaves 13 h 52 after DL 865 arrives on the timetable: more than half a day, so not a connection we count.