Fog restrictions at Auckland Airport have now been lifted.
Hundreds of passengers had been grounded by heavy fog since early this morning.
At least 84 domestic flights were either delayed or cancelled.
One international flight was diverted to Wellington.
Earlier, passengers were being advised to check Auckland Airport's website for the latest information.
Fog at @AKL_Airport – delays and cancellations expected. For the latest flight information: https://t.co/YcGiDWOtvX or use our app.
— Auckland Airport (@AKL_Airport) May 26, 2017