"On AIR FRANCE, KLM, Air Europa, Kenya Airways flights, you can take advantage of a one-way Award ticket (2) for half the price of a round-trip Award."

(2) Stopovers are not permitted on this type of ticket.
Only US residents can take advantage of the one-way Award ticket to the United States. The reservation of a one-way ticket Award ticket on a domestic flight inside France is only available via internet.
Some code-sharing flights do not allow the issue of Award tickets. For more information, contact Flying Blue.

The bit about not being able to book one-way's to the USA unless you are a US resident is rubbish. I've booked one-way's the US with no problems whatsoever, and I'm not a US resident.

http://www.airfrance.nl/X01/en/local...cekedgfndghn.0