Thick fog in the capital has disrupted dozens of flights since yesterday afternoon, cancelling some and diverting others to Palmerston North.
By 1pm Air NZ had cancelled 37 arrivals and 37 departures today, and Jetstar and Sounds Air are also delaying flights.
A Wellington Airport spokeswoman said earlier the low visibility had also caused flow-on cancellations because aircraft were also not arriving last night.
The disruptions began at about 4pm yesterday, with only a handful of flights managing to land between 6.30 and 7am when fog briefly lifted this morning.
Passengers should expect cancellations and delays to continue after the fog lifts, as airlines will be playing catch up with their schedules.
