GE 152 then ET 21 at Johannesburg
Cape Town → Johannesburg → Blantyre
Timetable, Johannesburg time
13:00GE 152 from Cape Town at the gate
12:30ET 21 to Blantyre leaves the gate
23 h 30 apart on the timetable, overnight
ET 21 leaves 23 h 30 after GE 152 arrives on the timetable: more than half a day, so not a connection we count.