DL 3122 then DL 656 at Atlanta
Pittsburgh → Atlanta → San Francisco
Timetable, Atlanta time
22:00DL 3122 from Pittsburgh at the gate
21:27DL 656 to San Francisco leaves the gate
23 h 27 apart on the timetable, overnight
DL 656 leaves 23 h 27 after DL 3122 arrives on the timetable: more than half a day, so not a connection we count.