SA 578 then 4Z 799 at Johannesburg
Durban → Johannesburg → Port Elizabeth
Timetable, Johannesburg time
19:50SA 578 from Durban at the gate
18:154Z 799 to Port Elizabeth leaves the gate
22 h 25 apart on the timetable, overnight
4Z 799 leaves 22 h 25 after SA 578 arrives on the timetable: more than half a day, so not a connection we count.