SA 23 then FA 512 at Johannesburg
Harare → Johannesburg → Cape Town
Timetable, Johannesburg time
14:25SA 23 from Harare at the gate
12:50FA 512 to Cape Town leaves the gate
22 h 25 apart on the timetable, overnight
FA 512 leaves 22 h 25 after SA 23 arrives on the timetable: more than half a day, so not a connection we count.