Deal on Sydney - Singapore flight for $508 return at EXPEDIA.ie

There are some discounted Qantas return flights Sydney - Singapore for only $508 at Expedia.ie. Some of the offers that caught my eye were both return and one way: SYDNEY to Singapore $349 one way Economy $698 return Economy $999 one way Premium Economy $1998 return Premium Economy $3299 return Business Hong Kong $399 one way Economy $798 return Economy $899 one way Premium Economy $1798 return Premium Economy $3798 return Business Jakarta $399 one way Economy $798 return Economy $2888 return Business Shanghai $419 one way Economy $838 return Economy $3838 return Business Manila $474 one way Economy $948 return Economy $2888 return Business Bangkok $888 return Economy $3599 return Business Tokyo $2199 return Premium Economy $4199 return The offer is valid for departures from 15 April and 18 June 2013 in Economy and Premium Economy and between 27 March 2013 and 15 January 2014 in Business!