SA 558 then 4Z 931 at Johannesburg
Durban → Johannesburg → Cape Town
Timetable, Johannesburg time
15:50SA 558 from Durban at the gate
15:054Z 931 to Cape Town leaves the gate
23 h 15 apart on the timetable, overnight
4Z 931 leaves 23 h 15 after SA 558 arrives on the timetable: more than half a day, so not a connection we count.