The airlines flying into Australia are not flying profitability. Most flights have just a few passengers on them. They're flying valuable cargo. Some airlines, like Qatar - are taking advantage of their 'closed books' business by using this opportunity to market themselves. They're flying all over the world to 'get you home'. It is a branding exercise for them.
Delta airlines released their quarterly results yesterday. Some US$5.7b loss. Let that sink in...