Almost need a cheap-from-coronavirus tag at present! Qantas has amazing prices to most major cities in NZ (still Covid-19 free!), and here's an example to what is usually the most expensive of the 3 biggest cities - Wellington from less than a Jetstar ticket!
To: Wellington NZ (and others)
Cost: from $268 return, inclusive of checked luggage, food, entertainment
Times are good too - with mid-morning departures from both cities!