Flights at Auckland Airport were impacted by the closure of its runway for maintenance on Thursday afternoon.
The work was carried out within an hour, reopening just after 4pm, but impacted a number of flights.
"Unfortunately, a number of flights were diverted or delayed and we are sorry for any inconvenience caused to travellers," a spokesperson said.
"At Auckland Airport there are approximately 180,000 flights per year and 500 flights per day, and the safety and security of travellers is our highest priority.
"On occasion, Auckland Airport will temporarily close the runway outside the planned closure windows to allow closer inspection of a particular area, to remove FOD and/or to undertake maintenance if required."
In January, emergency maintenance created chaos for travellers, with multiple flights rescheduled or delayed.
Aircraft from multiple airlines were affected. Air New Zealand released a statement saying a number of its regional services have been impacted.
"As a result, six turboprop aircraft due to arrive at Auckland Airport have diverted to either Tauranga, Rotorua or Hamilton where they will refuel and continue to Auckland," a spokesperson said at the time.