It's thought that the aviation sector is over capitalising - as New Zealand's domestic airfares have shot up more quickly than any other country.
A global airport group says domestic airfares are up 63% in six years, and are well ahead of the second-highest, up 53%.
Air New Zealand's Chief customer and digital officer Jeremy O'Brien told Mike Hosking that accelerated inflation is effecting the industry.
He says we're a reasonably small country with long distances to fly.
O'Brien says in many cases the industry is over-capitalising, which then impacts the sustainability of the market.
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