Google "Using AA Miles on Cathay"
will lead you to this page http://www.aa.com/i18n/AAdvantage/earnMiles/travel/airlines/cat
To book award travel on one of our AAdvantage participating carriers or
oneworld airlines, contact Reservations at 1-800-882-8880 (or your local
American Airlines office). An award service charge applies to AAdvantage
award reservations ticketed by our reservations office, Travel Centers or
airport agents. View complete details on making award reservations
简单的说，如果你用AA的里程，那就得找好Cathay的航班，然后让AA的客服办理。
网站上没有就得打电话。应该会有$30左右的手续费。三周内的票还会有额外的80左右
加价。
