Jetstar has just announced sale fares to Christchurch (return) during the ski season. Plenty of seats available at time of posting.
Valid for travel 06/05/15 to 24/06/15, and 22/07/15 to 14/09/15. Offer ends 16/02/15.
Here's the proof:
Booking/service fees don't apply for payments made by POLi, Voucher, Jetstar MasterCard, or Jetstar Platinum MasterCard.
Happy travels :)
Nice, Mt Hutt, closest mountain to Christchurch is not bad, it does cop the weather pretty bad and they often close half the mountain.
I'd almost recommend flying into Christchurch, hiring a car and doing the drive down to Queenstown/Wanaka. Will save lots of money and the drive is amazing, so scenic, then you get multiple mountains to choose from.