"Right now, it's one-way traffic, with nearly three times as much travel going to New Zealand as in the opposite direction", said Olivier Ponti, vice president insights at travel data firm ForwardKeys.
The government is now "in discussions" with Singapore concerning the creation of a quarantine-free travel bubble.
At a press conference on Tuesday afternoon, Prime Minister Jacinda Ardern said the COVID-positive airport worker is someone who cleans planes after they arrive from "red zones".
Under the terms of the trans-Tasman bubble agreement, all states, territories and New Zealand can suspend quarantine-free travel with places that have outbreaks.
Ticketing from April 6 to 12 for travel from New Zealand to Australia recovered to 27% of the volume seen in the same period in 2019, while the opposite direction recovered to 69% of the 2019 level, according to ForwardKeys data provided to Reuters. She's dancing in a dance crew, over in Auckland, so finally I left her there. "So happy'", she said. "I just wanted to get on that first flight because you never know, it may go south. Let's hope it sticks around".
Trish Stamoulos, about to head to New Zealand from Sydney Airport, told the Seven Network that her daughter, who is only 16, had been in New Zealand for over a year.
Television footage showed emotional scenes at the airports with families reuniting and scores of passengers thronging the global departure terminals at Australian airports.
The Ministry of Health confirmed in a statement that the person in question is a worker at Auckland Airport.
The leaders of both countries welcomed the bubble, saying it was a world-leading arrangement because it aimed to both open borders and keep the virus from spreading.
"This is also someone who is part of routine testing".
Ardern reassured the public that the case won't affect the travel bubble and Health Minister Andrew Little has spoken to his Australian counterpart about the border-related case.
The worker is not very sick and has not been hospitalised, Ms Ardern added.
Qantas will join Jetstar and Air New Zealand in connecting the Gold Coast to Auckland from today.
Some were visiting family and friends, while others were attending funerals.