How long would a flight from CA to hong kong take?

Me and my husband are having a debate most likely any flight from the US to Australia would have a stop over and if so how long would a complete leg from CA to Australia take as well.
How long would a flight from CA to hong kong take?
Fly United, non stop to Sydney takes 13 hours
How long would a flight from CA to hong kong take?
well, from perth to hk is round about 7.5 hrs. do tat's all i can tell ya!
well, from perth to hk is round about 7.5 hrs. do tat's all i can tell ya!
LA to Sydney is 13 hours. That's all I know.
it could take anywhere form 13 non- stop or up to 25 if you have alot of stops .
A bit more than 11 hours,