You can find the cheapest airfare at Jetstar Australia Day Sale that will run until 30 January 2012. Lowest airfare is just $35 one way.
Melbourne (Avalon) to Sydney - $35
Adelaide to Melbourne (Tullamarine) - $39
Brisbane to Newcastle - $39
Launceston to Melbourne (Tullamarine) - $39
Gold Coast to Sydney - $39
A lot more destinations are available from the sitte. Book Now!