The freight forwarders allege the airlines "conspired to develop and implement an industry-wide index for calculating fuel and security surcharges that were applied to thousands of routes flown worldwide by the defendants, including flights to and from the United States", and were able to adjust those rates 28 times between January 1, 2000 and September 30, 2006.
The alleged price-fixing has been the subject of antitrust actions around the globe, with big settlements from multinational airlines in Europe and the US.
Here the Commerce Commission reached settlements with 11 carriers, including Air New Zealand, securing penalties totalling $45 million, or about 10 per cent of the revenue generated from air freight forwarding services in and out of New Zealand in 2006.
Air New Zealand has not been prosecuted in other jurisdictions; European and US regulators dropped their claim against the airline. The Australian Federal Court tossed out legal action against the airline in 2014, a decision which is under appeal.
The airline was also excluded from a class-action settlement in Australia and clawed back $3.2 million in legal fees. It has been noting the US litigation as a contingent liability in its annual report since 2007.
Air NZ shares closed up 7c yesterday at $2.93.