Air New Zealand is wary of more competition emerging across the Pacific from the alliance between Emirates and Qantas.
Emirates said this month it wants to extend its alliance with Qantas across the Pacific, allowing passengers to fly around the world on Airbus A380s.
Air New Zealand chief executive Christopher Luxon said signs of growth returning to international travel came with the prospect of more competition.
"That doesn't look like changing any time soon with Emirates stating in the past week that it has further ambitions in the Pacific as a result of its alliance with Qantas," he told staff in his weekly newsletter.
"This is a timely reminder of how our sales and marketing teams around the world must be at the top of their game at all times."