The competition watchdog says Qantas is not doing enough to compensate the 68,000 passengers left out of pocket by its grounding.
Qantas has offered customers refunds, the opportunity to rebook flights and compensation for expenses incurred by certain travellers. The airline is dealing with other claims on a case by case basis.
Australian Competition and Consumer Commission chairman Rod Sims says while that offer addresses some of the commission's concerns, it doesn't go far enough.
"These circumstances are extraordinary and there have been a huge number of passengers significantly affected," Mr Sims said in a statement on Wednesday.
"It is squarely in the airline's camp to make good.
"If you have incurred additional expenses as a result of the grounding, the ACCC is of the view that Qantas should compensate you for all your reasonable losses."
