You need to use this page of the Qatar Airways website. Only the base fare is discounted, so the saving will be a little lower than 10% on Business Class tickets and a lot lower on Economy Class tickets where taxes are a higher percentage of the total.
In typical Qatar Airways fashion it is difficult to know exactly what is going on. The T&Cs say you need to fly by 30th June although elsewhere it says 10th December. It also says that only ‘selected destination’ are included, but does not list those destinations – I tried Bangkok but that seems to be excluded. However, if you are planning to book a Qatar Airways flight in the near future then today is a good day to do it.
Your best option to maximise your miles when paying is American Express Preferred Rewards Gold. This offers double points – 2 per £1 – when you when you book flight tickets directly with an airline. Our review of Amex Gold is here.
(Want to earn more Avios? Click here to visit our home page for the latest articles on earning and spending your Avios points and click here to see how to earn more Avios from current offers and promotions.)