SA 558 then SA 343 at Johannesburg
Durban → Johannesburg → Cape Town
Timetable, Johannesburg time
15:50SA 558 from Durban at the gate
14:30SA 343 to Cape Town leaves the gate
22 h 40 apart on the timetable, overnight
SA 343 leaves 22 h 40 after SA 558 arrives on the timetable: more than half a day, so not a connection we count.