It's that time of the year to celebrate Jetstar's Mid-year Sale! With fares from $39 for Newcastle to Brisbane! JetSaver Light^ fare - Carry on baggage only.
Sale ends midnight (23:59 AEST), Monday 30 June 2008, unless sold out prior. Sale may be extended.
Jetstar have extended the previously posted sale to include more routes, see details below (fare prices are JetSaver Light/JetSaver):
Domestic:
Brisbane - Cairns - $89/$99
Brisbane - Hamilton Island - $79/$89
Brisbane - Mackay - $59/$69
Brisbane - Newcastle - $39/$49
Brisbane - Rockhampton ^ - $49/$59
Brisbane - Townsville - $99/$109
Brisbane - Whitsunday Coast - $69/$79
Gold Coast - Newcastle - $55/$65
Melbourne (Avalon) - Perth - $159/$169
Melbourne (Avalon) - Sydney - $75/$85
Melbourne (Tullamarine) - Ballina Byron - $99/$109
Melbourne (Tullamarine) - Cairns - $149/$159
Melbourne (Tullamarine) - Gold Coast - $79/$89
Melbourne (Tullamarine) - Hobart - $49/$59
Melbourne (Tullamarine) - Perth - $169/$179
Sydney - Ballina Byron # - $59/$69
Sydney - Brisbane - $75/$85
Sydney - Cairns - $129/$139
Sydney - Gold Coast ~ - $55/$65
Sydney - Fraser Coast - $59/$69
Sydney - Launceston - $69/$79
Sydney - Sunshine Coast - $65/$75
International:
Adelaide - Phuket $479/$499
Brisbane - Christchurch $149/$169
Brisbane - Phuket $499/$519
Cairns - Christchurch $339/$359
Darwin - Singapore $139/$159
Gold Coast - Christchurch $149/$169
Melbourne (Avalon) - Phuket $449/$469
Melbourne (Tullamarine) - Bangkok $329/$349
Melbourne (Tullamarine) - Christchurch $169/$189
Melbourne (Tullamarine) - Singapore $299/$319
Sydney - Christchurch $149/$169
Sydney - Phuket $369/$389
Update:
These mostly seem to be on www.adioso.com as well, so you should be able to find which days have discounts by searching there, ie:
http://www.adioso.com/search/melbourne-to-singapore.html
http://www.adioso.com/search/sydney-to-phuket.html
http://www.adioso.com/search/brisbane-to-christchurch.html