Originally Posted by eightblack

But its not really. It's doing ONE one-way trip to get to a better start point (from a cost perspective).

My example is real. I was based in MEL. I relocated to SIN. I bought a ONE-WAY ticket to SIN (so I might not get the best deal on the one-way ticket, but not too bad). I then commence my round trip tickets from SIN (due to the fact that they are something of the order of 30-40% cheaper than MEL.

As long as I need to keep going back and forth (which I do), then it is fine.

Same applies if you do multiple trips to Europe. Your return leg will always be "open" if you get my meaning.