DL 3122 then DL 819 at Atlanta
Pittsburgh → Atlanta → San Diego
Timetable, Atlanta time
22:00DL 3122 from Pittsburgh at the gate
19:23DL 819 to San Diego leaves the gate
21 h 23 apart on the timetable, overnight
DL 819 leaves 21 h 23 after DL 3122 arrives on the timetable: more than half a day, so not a connection we count.