There's been cheaper return fares in the past but not bad for a full service airline and if you're not looking to come back.
From website :
`Travel dates
Fares are valid for departures between 26 September and 6 December 2014, unless sold out prior.
Book now
Sale ends 11.59pm (AEDT) 7 October 2014, unless sold out prior'
Skyscanner is saying $481 but it takes you to a different website :
http://www.skyscanner.com.au/transport/flights/syd/hnl/14100…
As steptoe noted below you can get a cheap jetstar flight back to Sydney in November. I found one for $409. So total return is $908 with one leg Qantas.
Just saw tightarses post and if you don't mind flying Jetstar looks like it's a fair bit cheaper to use them both ways. Don't know how I missed those prices.
Jetstars Friday fare frenzy has Sydney to Honolulu from $439 one way if you really wanna save the pennies, but I think the extra $60 is worth the extra comfort etc :
http://mobile.jetstar.com/s/specialOffers?lang=en_AU#/?from=…