Air New Zealand is rolling out automatic re-booking technology to international flight cancellations after rolling it out for domestic flights mid-last year.

The airline says previously, re-booking customers after a long-haul cancellation took up to six hours.

Ground and In-Flight Chief Operations Officer, Kate Boyer, says itineraries will now be automatically rebooked - usually in under 20 minutes.

"We're using an algorithm to search for seats and availability, and make sure we can give customers a sort of certainty on their plans."

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