Thanks to nick123 for this post.
Travel period is from 21st July to 10th December 2015. Fares start from $99. Highlights of this sale are:
Darwin to Singapore - $99
Perth to Singapore - $129
Melbourne to Singapore - $199
Brisbane to Singapore - $215
Booking ends on Wednesday, 1st July 2015.
^Prices based on payment by direct deposit / POLi, voucher, Jetstar MasterCard or Jetstar Platinum MasterCard for bookings through jetstar.com. For all other bookings, a Booking and Service Fee of $8.50 per passenger per domestic flight and $8.50 - $12.50 per passenger per international flight applies.
Fares quoted are one way and only available online. Checked baggage is not included with Starter fares but may be added for a fee. All sale and special offer fares available until sale ends or sale or special offer is sold out. Please make sure you read the important information about sale and special offer fares.
Sydney to Singapore $285. This is about usual price bandied around other sites right?.