The airline has been operating a second flight only during the high season and was due to return to the twice weekly flights from the end of this month.
The Secretary to the Niue government Richard Hipa said Niue had signed an air services agreement with the airline for the second flight to continue through the low season.
"It's good news for us and we just hope there'll be bums on seats to make it economical."
"We really look at it as an investment with Air New Zealand. Our objective now is to market the low season and try to get events to Niue to happen in the early part of the year," he said.
Mr Hipa said there was high demand for the extra flight year round from the many Niueans living overseas returning for family and village functions.