As the title says I need to get some flights from Australia to Zaragoza in Spain.
I would like to use *A carriers as much as possible. Unfortunately ZAZ is not served by *A at all.
So far I have looked at SQ MEL-SIN-CDG-MAD and then connect with IB to ZAZ (about 4 hours transit in MAD)
or TG MEL-BKK-FCO-MAD then IB to ZAZ (about 3 hours transit in MAD)

Both thses work ok on the outbound but if I use the same trip return I will need to spend the night in MAD as the ZAZ-MAD flight arrives there late at night.
It would be possible to got ZAZ-MAD on IB and then connect to SQ FRA-SIN-MEL. Can one ticket something like that?

I like the SQ Spacebed anyway so that would be my No. 1 choice.

Is there anything I have overlooked? or is there a more convenient route there that I didn't think of?