I am sure that Leagal and BradJill will know the answers, but if they don't reply before your departure date, I'd suggest posting this in either the Hong Kong or the air travel forums.
I've never been to Hong Kong but I would think the best way to get to the Hong Kong International Airport would depend in part on where you were going from.
However, This may help:
as may asking the question here:
I hope the Typhoon will have setted down by the 25th!
I usually fly in an out of Tokyo but this may help at the Osaka end:
Have a wonderful trip!
Hong Kong is a small and densely populated area of around six million people and it depends on where you are staying on the mainland or island but the easiest way is using MTR Airport Express which is easy to use and works perfectly and much faster than any taxi or car service.
From personal experience several years ago, whilst working in Hong Kong I had the option of a car service with my flight, which is fine on arrival because you are tired but going back because the car service wanted to leave far too early, just to hang around an airport, so I opted for the Airport Express and had more time to chill.
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