從香港去阿根廷的布宜諾斯艾利斯有乜航線

南非航空公司已經開辦來往香港往巴西聖保羅（經南非約翰尼斯堡）的航線，而且亦將會開辦來往香港往阿根廷布宜諾斯艾利斯（經南非約翰尼斯堡）的航線

Hi, there are several airlines fly from HK to Buenos Aires.

just name a few here::
-Air Canada (via Toronto and Santiago)
-Air France (just one stop in Paris)
-Continental Airlines (change in New York)
-KLM (via Amsterdam and Paris)

or you can change planes in more than 2/3 stops with Virgin/Qantas/LAN etc...

you can get more information on the following websites:

www.zuji.com.hk
www.opodo.co.uk
www.amadeus.net