Passengers flying in and out of Wellington are being told to check their schedule as some flights have been affected by heavy fog.
A number of flights due to arrive in the capital city have been diverted, delayed or now has an "indefinite delay" message attached to it.
An Air New Zealand flight to Auckland, scheduled to leave at 10.30am, has now been delayed until 10.50am.
While a second Air NZ flight from Wellington to Christchurch, due to leave at 10.05am, is now set to depart about half an hour later.