Jetstar is having a weekend only sale on flights to Auckland, Christchurch and Queenstown from Sydney and Melbourne.
Melbourne flights from $173 Return, Sydney from $213. That’s an amazing price for an international trip!
https://www.jetstar.com/au/en/friday-fare-frenzy
I've checked dates for my birthday in November and random week days in October and consistently found them available (if at awkward times of the day).
Sale ends 25 June at 11.59pm unless sold out earlier.
Auckland from 24 July to 19 September, Christchurch from 29 October to 5 December, and Queenstown from 10 October to 15 December.
Any cheap one way tickets?