香港有機直飛西雅圖(Seattle)嗎 ?

The below routes are from United Airline

Route 1 : HK -> Tokyo -> Seattle
Route 2 : HK -> San Fransico -> Seattle
Route 3 : HK -> Tokyo -> San Fransico -> Seattle
Route 4 : HK -> San Fransico -> Portland -> Seattle

Actually UA provides the routes are those more direct.... if you wanna have those indirect and cheap, also have lots of other routes by a lot of airlines

you can get some indications from morningstar.com.hk and click on 'airtickets' then they will come up with a list for you to have reference on

and also you can go to united.com for the UA airline routes offer
or cathaypacific.com or nwa.com... and lots of other airlines as well which they offer online booking, you can check via them