Virgin Australia has a 48 Hours sale to Nz

Prices from $149 each way

https://email.virginaustralia.com/pub/sf/FormLink?_ri_=X0Gzc2X=WQpglLjHJlYQGN6vpf8OzbvR37h3i0STnYEzbXXBpON5CEDffVXMtX=WQpglLjHJlYQGlo29D6Kze3Trzgza51JLzbugWBOzf4LNCizg1zfJG&_ei_=Em75maxWxeg4EAhrDipPRzaIAEsYXX4SaZ18XkReDUg2zUHv.

109 is sydney to melb

NZ starts from 179, which is probably Auckland or christchurch

for queenstown
no specials for peak season only sept onwards

For peak
flights out are 170-200
flights back closer to 300
inc bag of course

Air NZ version also
http://www.airnewzealand.com.au/new-zealand-on-sale?utm_source=eDM&utm_medium=email&utm_campaign=3apr48hoursale

Actually as with previous Air NZ sales there are sales in the peak July-August periods even those it’s not advertiesd. $350 return direct Mel-Queenstown plus baggage