4Z 756 then FA 514 at Johannesburg
Mthatha → Johannesburg → Durban
Timetable, Johannesburg time
19:004Z 756 from Mthatha at the gate
18:20FA 514 to Durban leaves the gate
23 h 20 apart on the timetable, overnight
FA 514 leaves 23 h 20 after 4Z 756 arrives on the timetable: more than half a day, so not a connection we count.