The airline is selling 20 tickets from London to Sydney every day at midday until the end of the week.
The first 20 tickets were released yesterday, with the last chance to buy them on Friday.
With fares starting from £699 return, the cheap flight deal is just a fraction of the cost.
The airline has launched the deal in celebration of their 100th birthday.
https://www.thesun.co.uk/travel/10375542/qantas-cheap-flights-australia/