SA 546 then P0 23 at Johannesburg
Durban → Johannesburg → Lusaka
Timetable, Johannesburg time
12:10SA 546 from Durban at the gate
12:00P0 23 to Lusaka leaves the gate
23 h 50 apart on the timetable, overnight
P0 23 leaves 23 h 50 after SA 546 arrives on the timetable: more than half a day, so not a connection we count.