Air New Zealand signed a deal for 14 new planes from Airbus with a list price $1.8 billion.
CEO Christopher Luxon says the airline will pay discounted price of around $1.6 billion for the aircraft.
The order includes three A321neo, 10 A320neo and one A320, Mr Luxon at a press conference in Doha, where he is attending the International Air Transport Association's annual general meeting.
The neo aircaft will be delivered between 2017 and 2019, while the classic A320 will be supplied early next year.
The A320 series is all singlle-aisle.
Mr Luxon said that the carrier plans to have a fleet of medium-range airliners consisting exclusively of Airbus planes. Airbus's A320 family competes with Boeing's 737.
The planes will be used for Trans-Tasman and Pacific routes, CEO Christopher Luxon said, and will keep the airline competitive with fuel savins o up to 15% or $1.9 million a year.