I think you miss my point. Qantas has increased fares in the last few months because the price of fuel has increased. Most of that increase occurred last year NOT in the last few months - commonwealth securities research substantiates that. Therefore the recent fare increases should have been made to substantially cover the cost of fuel.
I believe they are factoring in hedging. Originally they were protected from a lot of the price change because of hedge contracts. These are getting more expensive to obtain now. Hopefully when the results are out there will be more info about their hedging and fuel costs.