Try prices for roundtrip tickets - you may find that you save some money. Also, if you don't have a HK passport or other proof of right of adobe or similar, it will save you from some potential hassle getting permission to board the flight. I'm assuming you have that in order though. You could also see if you get away with attaching a "third" leg without substantial increase in fare if you're interested in going somewhere else from HK on a later date. If you are a student try some student airfare sites. I've been on LAX-HKG on Cathay, it was nice. I've also used UAL for the same leg....heh. Not so nice, but I at least got one of the "good" coach seats in an (aging) 747 where you get space between your seat and the window.