Asia Pacific cities hold six of the top 10 spots and 32 of the top 20 . Hong Kong 's top ranking is largely due to large tourist influx from mainland China . Hong Kong -- 23,770,200 ( 6.5 % ) 2 . Forbes predicts China will be the largest source of international departures by 2017 .
Asia Pacific cities hold six of the top 10 spots and 32 of the top 20 . Hong Kong 's top ranking is largely due to large tourist influx from mainland China . Forbes predicts China will be the largest source of international departures by 2017 .