There's turbulence in Air New Zealand's relationship with Auckland Airport.
The airline is asking Commerce Minister Andrew Bayly to look into the Airport's development spending, concerned it will drive up airfares.
CEO Greg Foran says its plan doesn't deliver a new runway, or improve capacity.
He says Air New Zealand wants investment going into the airport, but they also want costs kept down.
"There hasn't bee a lot of capital invested at the airport, we can all see that we've sweated the asset for a long time. But that doesn't mean you want to go from the lowest prices to one of the highest prices."
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