ZN 307 then 4Z 799 at Johannesburg
Lusaka → Johannesburg → Port Elizabeth
Timetable, Johannesburg time
18:30ZN 307 from Lusaka at the gate
18:154Z 799 to Port Elizabeth leaves the gate
23 h 45 apart on the timetable, overnight
4Z 799 leaves 23 h 45 after ZN 307 arrives on the timetable: more than half a day, so not a connection we count.