SA 538 then 4Z 803 at Johannesburg
Durban → Johannesburg → Potgietersrus
Timetable, Johannesburg time
10:20SA 538 from Durban at the gate
09:354Z 803 to Potgietersrus leaves the gate
23 h 15 apart on the timetable, overnight
4Z 803 leaves 23 h 15 after SA 538 arrives on the timetable: more than half a day, so not a connection we count.