Qantas doesn't necessarily start and end all sales globally at the same time.
If you give some necessary information like origin, destination, one way or return, and approx travel dates, someone might be kind enough to look up the likely fare in EF and let you know what expiry is set.
This would just be the fare though, the seats you're looking at could disappear any time if Sale inventory is exhausted.
International J pricing appears to operate quite differently to dom
its much more situational and based on the volume and strength of competitors.
that said, you wish to fly QF/EK you will be paying a "signficant" price premium ex Australia
you might like to consider getting to Europe and taking advantage of J pricing ex low waged countries like Thailand, the phillipines, Indonesia and Malaysia - there's a recent article by Matt on this
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