Try using the code AUSKW12 which seems to be applicable to us.
I'm not sure what the 'additional' or 'extra' discount means because
the prices only deduct a straight 10% from the normal fare.
What isn't a good idea is to look at the cost of a return journey
from Australia to, say, Europe but do your destination to Australia (ie reverse the journey). In my case my planned PER - VCE - PER is $6,843 business Flex, but VCE - PER - VCE is 3,100 Euros (around $4,030) just a little different.
Why is it so. Marketing etc. Population with no other choice than to be screwed ?