DL 3122 then DL 520 at Atlanta
Pittsburgh → Atlanta → New York LaGuardia
Timetable, Atlanta time
22:00DL 3122 from Pittsburgh at the gate
21:30DL 520 to New York LaGuardia leaves the gate
23 h 30 apart on the timetable, overnight
DL 520 leaves 23 h 30 after DL 3122 arrives on the timetable: more than half a day, so not a connection we count.