SA 538 then 4Z 797 at Johannesburg
Durban → Johannesburg → Port Elizabeth
Timetable, Johannesburg time
10:20SA 538 from Durban at the gate
10:104Z 797 to Port Elizabeth leaves the gate
23 h 50 apart on the timetable, overnight
4Z 797 leaves 23 h 50 after SA 538 arrives on the timetable: more than half a day, so not a connection we count.