Airlines say charges at Auckland Airport could rake in up to $72 million in excess revenue over the next five years even though the Commerce Commission has given the charging regime a tick.
The commission said the information disclosure regime has had a positive influence on the airport's behaviour and had been effective.
"Auckland Airport targeted returns over the current five-year pricing period which, while above our assessment of a normal return, are not so high as to suggest that the airport would be expected to extract excessive profits," the commission said.
"Auckland Airport has made a number of positive changes to its price setting approach during the short time information disclosure regulation has been in place," said commission deputy chairwoman Sue Begg.
The airport's targeted return of 8 per cent a year for the 2013-17 pricing period is just within the commission's estimate of an acceptable range of returns of 7.1 per cent to 8 per cent.