4Z 770 then 4Z 799 at Johannesburg
Upington → Johannesburg → Port Elizabeth
Timetable, Johannesburg time
19:154Z 770 from Upington at the gate
18:154Z 799 to Port Elizabeth leaves the gate
23 h apart on the timetable, overnight
4Z 799 leaves 23 h after 4Z 770 arrives on the timetable: more than half a day, so not a connection we count.