4Z 760 then SA 571 at Johannesburg
Mthatha → Johannesburg → Durban
Timetable, Johannesburg time
17:204Z 760 from Mthatha at the gate
16:55SA 571 to Durban leaves the gate
23 h 35 apart on the timetable, overnight
SA 571 leaves 23 h 35 after 4Z 760 arrives on the timetable: more than half a day, so not a connection we count.