DL 3122 then DL 200 at Atlanta
Pittsburgh → Atlanta → Johannesburg
Timetable, Atlanta time
22:00DL 3122 from Pittsburgh at the gate
21:05DL 200 to Johannesburg leaves the gate
23 h 05 apart on the timetable, overnight
DL 200 leaves 23 h 05 after DL 3122 arrives on the timetable: more than half a day, so not a connection we count.