4Z 185 then SA 531 at Johannesburg
Gaborone → Johannesburg → Durban
Timetable, Johannesburg time
08:154Z 185 from Gaborone at the gate
07:30SA 531 to Durban leaves the gate
23 h 15 apart on the timetable, overnight
SA 531 leaves 23 h 15 after 4Z 185 arrives on the timetable: more than half a day, so not a connection we count.