Travel agents say it will be more expensive to travel to the United States when Air New Zealand has a monopoly on the direct route to Los Angeles from May.
Qantas on Thursday announced it will end its Auckland - Los Angeles service in May.
Air New Zealand says it will add further capacity to the US as a result of Qantas withdrawing. It currently operates 12 direct services to the United States.
But House of Travel retail director Brent Thomas says that with fewer planes on the LA route, there will be fewer low-price tickets.
Flight Centre general manager Dave Coombes, says the monopoly, and speculated price increases, could cause many New Zealander's to travel to the United states via Australia instead.