Save $180 on return flights from Sydney to Singapore with Qantas - book using Expedia.ie
I found that a return flight will cost you $520 with Expedia.ie (vs $699 with Qantas) on the following times and dates:
Depart: Sydney (SYD) at 09:40 Terminal 1, arrive in Singapore (SIN) at 16:00
Date: 4th July 2013
Return: Singapore (SIN) at 20:20 Terminal 1, arrive in Sydney (SYD) at 06:10 the next day.
Date: 18th July 2013
You can also get the same price for this round trip on the dates 13th - 20th of September. I´ll post a comment if I come across any more interesting deals on Expedia.ie.