A direct link to Argentina opens the way for Auckland Airport to be a hub for traffic not only from Australia but also Southeast Asia.
The airport's general manager of aeronautical commercial, Norris Carter, said Auckland offered good connections to southern South America.
Air New Zealand begins return flights to Argentina three times a week next month, a route on which it expects to build up frequency.
Carter said Auckland, mostly an end of the line destination, could be a good transit point.