Journo's - you can't believe a word they say.
I did my own comprison on the net, for a return flight Jnb - Cpt - Jnb on the 31st Jan 2005. I looked for a flight departing Jnb at 08h00 and then departing Cpt at 20h00. The prices on all the airlines are all inclusive, no additional costs.
Here are the results (closest departure times and the cost ):
1. 1time - Jnb 07h10 Cpt 18h00 Cost R841.00
2. SAA - Jnb 08h25 Cpt 20h25 Cost R1028.00
3. Kulula - Jnb 08h30 Cpt 18h30 Cost R1038.00
4. Nationwide - Jnb 07h20 Cpt 18h15 Cost R1323.00
Quite interesting!