Go through your results for flights to Pretoria in South Africa with Netflights.
If these flights are too expensive, try searching for a different time of year. So if your dates are flexible, consider looking at different times of year.
Or broaden your search by looking at other airports in South Africa.
For even more options, check what other airports you could fly to Pretoria from. You might be able to make a saving by going from a different airport or city.