4Z 730 then SA 531 at Johannesburg
Pietermaritzburg → Johannesburg → Durban
Timetable, Johannesburg time
08:104Z 730 from Pietermaritzburg at the gate
07:30SA 531 to Durban leaves the gate
23 h 20 apart on the timetable, overnight
SA 531 leaves 23 h 20 after 4Z 730 arrives on the timetable: more than half a day, so not a connection we count.