DL 3122 then DL 2987 at Atlanta
Pittsburgh → Atlanta → Boston
Timetable, Atlanta time
22:00DL 3122 from Pittsburgh at the gate
20:50DL 2987 to Boston leaves the gate
22 h 50 apart on the timetable, overnight
DL 2987 leaves 22 h 50 after DL 3122 arrives on the timetable: more than half a day, so not a connection we count.