In general, when booking your flight to Cape Town, November is the cheapest month on average.
On average, from most locations, when planning your trip to Cape Town, try to book your flight in the region of 60 days in advance for the cheapest prices.
In general, booking your departure to Cape Town for a Tuesday represents the best deal on airfare. Try to avoid a Friday departure to stay away from the highest prices.
Typically, cheap prices to Cape Town are most often found for afternoon flights. Cheap prices are less likely for evening flights.