It’s Scoot. But if you’re prepared to fly with carry-on, and plan your meals around airports – voila, as per several news articles (eg https://www.themercury.com.au/scoot-launches-deal-of-the-dec…) – Scoot’s latest sale includes their ‘deal of a decade’ with $299 one way flights to Europe (Athens, from Perth).
For comparison, this is cheaper than their launch price back in 2017 for this route.
Their sale claims dates from now until May 30, but we went through the dates by hand and there are only 3 remaining:
