Jetstar has cancelled hundreds of domestic flights because of sagging demand on main trunk routes over May and June.
A Jetstar spokesman said schedule "optimisation" was done from time to time.
"It's a low season over that period so we're probably doing more than normal. It's business as usual, it doesn't signify anything."
The airline has been flying domestic routes here since 2009 and late last year significantly boosted capacity seats with the addition of a ninth aircraft.
The spokesman said the cancellations were concentrated on the Auckland-Wellington route where it has most services and most passengers could be rebooked on alternate flights "within hours."