"Rumour is numbers are bigger now. Maybe as much as 35 flights and 13,000 Germans," the source said, welcoming the fact they would have more work for the time being.
Air New Zealand head of corporate affairs Andrew Kirton said the airline was unable to comment on charter flights.
Late yesterday, the airline said it would operate a limited international network from March 30 to May 31 to enable essential travel and keep air freight moving through key cargo corridors to North America and Asia. Overall, international capacity would reduce by 95 per cent from pre-Covid-19 level.
The first source said the airline could use the returning flights from Frankfurt to Vancouver to get Kiwis back home to New Zealand through Canada.
Yesterday, Prime Minister Jacinda Ardern told reporters it was getting harder for the government to bring New Zealanders home.
"Ultimately, we are in a position when, unless there are commercial flights operating, it's almost impossible to bring people home. As you will have heard me say yesterday, the message now is, wherever you are, set yourself up for the time being."
Asked why the government couldn't put on mercy flights in the way Germany has, the prime minister said, "keep in mind we are talking about New Zealanders scattered all over the world and what Germany is doing is looking at several thousand Germans in one place."
"The window for travel has closed not through any fault of the New Zealand government," she added.
Foreign Minister Winston Peters wasn't immediately available to comment.
Air New Zealand today said it continues to work with the government to ensure critical cargo transport lines are maintained and has introduced charter services to every port on its network except London. Its Boeing 787-9 Dreamliner can uplift 11 cargo pallets, each weighing up to 4,600 kg, in each direction it flies.
Shares in the airline were up 4 per cent at 90.5 cents this afternoon. Last week it was given a $900 million lifeline by the government last week in the form of loans that may convert to equity.