Addit :
J and W are not sold anymore on 2 May QF9 PER-LHR - it’s completely full in those cabins.
Thinking laterally-
Economy fares are still in “Sale” for 2 May
One possibility is to buy 1 comfort seats in Y. Net price will not include taxes.
A return extra seat can be had for $1500 LESS taxes plus SC plus luggage allowance plus catering
