SA 25 then 4Z 176 at Johannesburg
Harare → Johannesburg → Gaborone
Timetable, Johannesburg time
07:55SA 25 from Harare at the gate
07:254Z 176 to Gaborone leaves the gate
23 h 30 apart on the timetable, overnight
4Z 176 leaves 23 h 30 after SA 25 arrives on the timetable: more than half a day, so not a connection we count.