In general, when booking your flight to Mthatha, March is the cheapest month on average.
Most flyers found that booking flight tickets 59 days in advance of their planned departure date is, on average, the best time to get cheap flights to Mthatha.
From most locations, the cheapest flights to Mthatha are found on a Thursday. Booking a Sunday departure is usually the most expensive.
On average you can find the best deals on plane tickets to Mthatha when looking for flights with midday departure times.