International airlines are now in doubt about their ability to fill up their planes with fuel in New Zealand.

Airlines are having to limit fuel consumption, after a bad batch of refined fuel was imported into Northland's Marsden Point.

No flights have so far been cancelled, and a new shipment is due in the country on Monday.

But Board of Air Line Representatives Executive Director Cath O'Brien told Mike Hosking overseas airlines are now raising questions about New Zealand's fuel resilience.

She says long-haul carriers cannot tanker as they're already too heavy flying into New Zealand, so they're having to make back-up plans to pick up fuel along the way.

Marsden stopped refining fuel itself, this year.

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