The ACCC is seeking penalties for alleged price fixing between early-2003 and 2006.
The alleged contraventions relate to fuel surcharges applied to international carriage of air cargo during that period.
The three airlines have made a number of admissions and consented to the remedies sought, including penalties, injunctions and costs. The level of penalties will be decided by the court.
Martinair, like Cargolux, has agreed to a penalty of Au$5 million.
Air France and KLM have agreed to a combined penalty of Au$6 million, taking into account their common ownership during much of the alleged misconduct.
A hearing has been set for Monday February 16th.
The latest proceedings follow similar proceedings against Qantas and British Airways, who were ordered by the Federal Court to pay penalties of Au$20 million and Au$5 million respectively.
The ACCC began contested proceedings against Singapore Airlines Cargo in December last year, and continues to investigate other airlines.
