Originally Posted by Globaliser

Instead, simply think of them as two of the airlines operating domestic sectors in South Africa: British Airways and Kulula. You can buy a ticket on a British Airways flight, which will have a BA flight number (and, for almost all purposes, it's the same as a British Airways flight operated by BA itself). Or you can buy a ticket on a Kulula flight, which will have an MN flight number. And that is all you need to know.

Many travel websites confuse the issue by misdescribing these flights. Ignore them and remember the above.