Originally Posted by
ralphs
Has anyone been able to book using AS miles on a flight marketed by a Hainan subsidiary (e.g. Hong Kong Express HX)
Different airline entirely, and not an AS partner, so there is no way to use miles.
HK Express isn't really a subsidiary of Hainan itself, and I think even Hainan's parent company still only has a minority stake -- but even in the cases where a second airline is a direct subsidiary of an AS partner (e.g. Cathay Dragon f/k/a Dragonair), AS miles can't be used without an agreement specifically with that airline.