But from Tuesday next week it would reduce its domestic flights to and from Auckland, at least temporarily.
More community transmissions have since been reported. Customers travelling from other ports were also recommended to wear masks, but it would not be a requirement.
The current Level 3 restrictions in Auckland requiring people to mostly remain at home, and level 2 restrictions for the rest of the country, are not as severe as the five-week level 4 shutdown she imposed earlier in the year.
Details would be worked out this weekend and the Covid response settings would be reviewed on August 21.
"We are confident we have implemented a broad range of measures to effectively deal with Covid-related issues", polytechnic chief executive Megan Gibbons said.
"Our current expectation is that by this time, the perimeter of the cluster will be identified, will be isolated, and we can move to Level 2 in Auckland with confidence", she told reporters in Wellington.
There were concerns a repeat of that process would come with a huge economic cost and Ardern on Friday announced the extension of a wage subsidy scheme and mortgage deferral program to support businesses and protect jobs.
The prime minister says today there were signs the latest cluster has been found "early in its life".
The government will make decisions and inform people of any further alert level changes at 5:30 p.m. local time in advance of the lockdown finishing at Friday midnight.
The Perseid Meteor Showers Peak Tonight
The astronomical event is associated with the dusty debris left by Comet Swift-Tuttle, which orbits the sun once every 133 years. This year, the Perseids peaked from August 11 to 12 and the ESA captured the moment using its meteor camera in Tenerife, Spain.
"These two people tested positive after being followed up as close contacts from a family member who is one of the Auckland cases", he said.
Genome testing suggested the new virus outbreak had originated in Britain or Australia, but officials were investigating how the family in Auckland contracted it.
Meanwhile, South Korea reported 103 new confirmed COVID-19 cases on Friday, a big spike after recording almost 50 news infections over the last two days.
There have been breaches in New Zealand before - in July, a man cut through a fence at a managed isolation facility to visit a liquor store, and another man who later tested positive for coronavirus broke out of a facility and visited a supermarket.
Ardern is under pressure ahead of a upcoming general election, with the main opposition National Party accusing the government of failing to secure quarantine facilities and withholding information.
In a statement issued last night, Hipkins said his focus over recent weeks has been to ensure the country's health services are in the best possible position to quickly detect and stamp out any resurgence of Covid-19 no matter where it occurred in New Zealand.
Dr Ashley Bloomfield announced 14 new cases of COVID-19 in New Zealand on Thursday.
The new cases reported on Friday bring the total number of active cases in New Zealand to 48, with one person in Auckland Hospital.
But Mr Elder was upbeat and said the congregation would pray for the city and particularly for people who were vulnerable.