I am planning a small RTW trip, which will be my first int'l trip alone, so I am only going to countries where English is an official language. I plan on taking the "Kangaroo Route", which would be Minneapolis-London-Singapore-Sydney-Los Angeles-Minneapolis. So which airline would be better for the LHR-SIN-SYD portion? I originally leaned toward Qantas, but I am not sure if they have fifth freedom rights on the LHR-SIN route, so I am looking at Singapore Airlines as well. Any help is greatly appreciated.