Air New Zealand is overhauling its Seats to Suit products on short-haul international routes to give passengers more affordable flexibility - and drive more revenue for the airline.

It will offer cheaper ways to buy more flexible tickets and at least snacks and seat-back entertainment for all passengers.

It is, however, doing away with options for a neighbour-free seat and the opportunity to buy food on its short-haul flights across the Tasman and to the Pacific Islands.

The changes start for new bookings from June 11.