If you max out Eva Air Infinity MileageLands with Star Alliance Gold you get to access United Clubs on a Domestic flight Since the max tier of Infinity Mileagelands is seen as Star Alliance gold by the UA lounge agents. In North America that's seen as AC Aeroplan Star Alliance Gold used to access United Clubs on a domestic flight. Therefore Eva Air FFQ might be a good choice if traveling internationally then combined with UA domestic runs. On the other hand, if UA Mileage Plus Star Alliance Gold was obtained you get to access EWR Terminal A Maple Leaf lounge LAX Star Alliance lounge IAD LH and TK lounges