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This trip is so long that if you traveled any further you would begin to circle the globe and would be on your way back to your starting point. Eight thousand miles of open sky and a 16 hous flight time are what separate New York (NYC) and Hong Kong (HKG). The flight route is generally frequented by business travelers, but there certainly is enough to keep the tourist engaged too. You can hop on a direct flight on Cathay, Pacific and United Airlines- altogether they offer 2-4 a day.
The typical low cost airlines are not really cut out to make it across a hemisphere, so you won't get a cheap ticket that way. Savings on your air ticket will result from booking as early as possible.
This city is the quintessential urban space. Standing from Victoria Park looking over the relentless skyline it even makes Manhattan look like a one-horse town. So, as one would expect, getting around from the airport is efficient and fast. For example, you can take an airport express line every 12 minutes any time between 05.50 and 00.48 to get to the airport.