Going Boeing,
Singapore and HNL are not similar at all. HNL was really just a fuel stop and is now simply a low yield vacation destination. SIN is a high yield business destination and an important hub for flights throughout Asia and lower volume destinations in Europe. Do you think anybody will operate a Sydney direct Brussells service. Only LHR will get the direct, the rest of Europe will be via 2 sector trips through the likes of SIN,KL,HKG,BKK.