According to the NZ Herald J* are going to start regional services Auckland to Palmerston North and Auckland to Napier along with Nelson and New Plymouth.
Air NZ used to run 737's to both Napier and Palmerston North, I wonder if we might see A320's on those runs?
It's probably fair to say neither Nelson nor New Plymouth are likely to see jets anytime soon.
Jetstar's new routes: Nelson, Napier, New Plymouth and Palmerston North make the cut - Business - NZ Herald News