SA 538 then ZN 304 at Johannesburg
Durban → Johannesburg → Lusaka
Timetable, Johannesburg time
10:20SA 538 from Durban at the gate
09:55ZN 304 to Lusaka leaves the gate
23 h 35 apart on the timetable, overnight
ZN 304 leaves 23 h 35 after SA 538 arrives on the timetable: more than half a day, so not a connection we count.