From next month British Airways will increase its current 10-times-a-week A380 service to double daily, replacing the four weekly B747 flights.
Johannesburg will be the only British Airways route with two daily A380s apart from Los Angeles.
In November the daily London-Cape Town Boeing 747 service will increase to double daily for the South African summer season and the airline will start operating three additional Boeing 777 services from Gatwick.