Cheap Flights to Australia from San Francisco

The booking period for discount Qantas flights to Brisbane, Melbourne, and Sydney has been extended to March 20th (this Friday). they also have a discount flight to Auckland, NZ. Details.
Round trip flights are going for under $700, and you must fly between March and late October. October is a particularly temperate month [...]

Details: Qantas Airlines (one of my favorites) , is offering discount flights to a number of Australian cities for $675 plus American taxes, which can range from $150-200. More Details.
Timing: Must fly between now and October 14th. Book before March 16th.
Traveler Notes: This is very much the off-season [...]