Opodo pulls up both direct and indirect flight options for Singapore to Perth (Australia) side by side. Rank them however suits you, by price or by schedule, and lock in the one that works.
On this route, fares have recently dipped as low as €104. What you end up paying hinges on the specific dates and flight times you select.
Going direct between Singapore and Perth takes around 8 h and 45 m. Choosing an indirect route will add to that travel time.