Travellers planning to take to the skies may have to brace for a hit in the wallet.

Air New Zealand is warning they're going to have to hike flight prices due to rising fuel costs and demand.

Chief Executive Greg Foran told Tim Dower about 15 per cent of the price of an airfare goes into fuel costs for a domestic flight and up to 35 per cent for an international flight.

He says especially on long haul flights, it's very pricey filling up a large plane and the cost of aviation fuel has effectively doubled for them in the past year.

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