Cancel a segment on trip with mixed flexibility

[Andyc]

Qantas currently have a sale for cheap return flights SYD-CGK-SYD. They're charging $1k to fly SYD-CGK but a return flight splits it as $423 SYD-CGK and $631 CGK-SYD.

I am considering booking the return ticket with the SYD-CGK leg as a "Sale" fare and CGK-SYD as a "Flexi Saver". After I have flown the first leg, can I then cancel the second flight and get a full refund of that leg?
Or do Qantas just refund the difference between a standalone one-way flight and what I paid?

I'm hopeful that this could be a cheap positioning flight

 

[serfty]

As usual, you should check the fare rules.

However it is usual with 'mixed' fares, the most restrictive rules generally apply.

 

[Andyc]

Thanks Serfty.
That's the line that the fare rules state but I'm not sure what it actually means.

Even after the completion of the "sale fare" segment, do the Sale Fare rules continue to override the flexibility of subsequent flights?
Does anyone have experience with this?