Just one flight has been able to land this morning at Wellington Airport, where dense fog still blankets the runway.
An airport spokesperson says more than 60 flights in and out have been cancelled so far today.
Between 11am and midday, just one flight, NZ8190 from Timaru, touched down.
It was one of just a handful of flights into the capital since the fog descended at about 4pm on Tuesday afternoon.
The airport advised passengers to check with their airlines for updates and monitor the live flight information on its website.