The value of international visitors could grow by more than $2.5 billion by the end of the decade, according to Auckland Airport.
The NZX-listed airport has launched an initiative called Ambition 2020, which assessed the potential of the tourism sector.
Auckland Airport said there was potential to grow visitor arrivals to more than 3.5 million by 2020, compared with 2.6 million last year.
Spending by visitors, excluding international airfares, could grow ahead of official estimates, to at least $8.5 billion, compared with $5.76 billion in 2011, the airport said.
Chief executive Simon Moutter said the airport had set itself some ambitious targets for tourism growth.