Air New Zealand is ending its regional services to and from Masterton, and flights between Whanganui and Wellington, saying the routes are not economically viable.
The airline has been flying between Masterton and Auckland since 2009, using a 19-seater plane.
But it says a lack of demand and increasing operating costs mean the service is running at a loss, and will end in February next year.
From December Air New Zealand will also cut its service between Whanganui and Wellington, which is currently five days a week.
However, the airline will increase capacity on its Auckland to Rotorua service by replacing a 19-seat aircraft with a 50-seat aircraft on some flights.
