Iberia (Spanish airline owned by the same company as British Airways) are offering members of their Iberia Plus frequent flyer program 9,000 Avios for every ticket booked between now and June 24.
The points needs to be used by December 1st.
These can be used for Qantas see previous here : https://www.ozbargain.com.au/node/319614
Send your avios to British Airways (fully exchangeable currency) and Book Qantas flights using Avios
The trick is to buy an exceedingly cheap ticket (you don't have to fly it) to avail of the bonus Avios (which are deposited into your account 10 days after purchase). For example, one way tickets from PMI to MAD are currently just 46.68 AUD
You can book a return trip as two one-ways and earn 9,000 Avios each time
You can book the cheapest Spanish domestic flights for 46.68 AUD and simply no-show – the bonus Avios seem to arrive 10 days after PURCHASING the ticket, not actually flying
You might be able to “Part Pay with Avios”, normally a poor deal, but in this case you might want to reduce the up-front cash cost of chasing some bonus Avios.
Don’t forget that you can earn cashback from TopCashback for booking on iberia.com.