Auckland Airport is disputing Air New Zealand's concerns the redevelopment will push fares up.
Air New Zealand has requested Commerce Minister Andrew Bayly look into concerns about the Airport spending up to $8 million on redevelopment.
The airline says the airport's regulated charges are expected to add $46 to a ticket price by 2032, a five-fold increase.
Auckland Airport CEO Carrie Hurihunganui says Air New Zealand's estimates aren't accurate.
"Unfortunately, before issuing their release today, they didn't share those numbers or the workings behind them- so we're not sure where those have come from."
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