✔ 最佳答案
Star Alliances members:-
Air Canada / Air New Zealand / ANA All Nippon Airways
Asiana / Austrian / BMI
LOT Polish Airlines / Lufthansa German Airlines / SAS Scandinavian Airlines
Singapore Airlines / South African Airways / Spanair
Swiss / TAP Portugal / Thai Airways
United Airlines / US Airways
Really depends on where you fly most frequent and which cities that you like to travel...
You have to think of the future travel. If you choose the wrong one, you will waste your mileages. Some memberships only offer bonus miles, discounts, lucky draws to its membership from its own country.
Sounds like you travel to Japan recently. Did you think about you travel very often to Japan? Sometimes, booking classes make different to what you earn from different airlines' membership.
My experiences:-
I still have active mileages from Lufthansa, United Airlines, Singapore Airlines, inactive with ANA
Well, I used to fly Singapore Airlines more frequent to London, Frankfurt, Sydney, Melbourne, Singapore; for certain reasons, I stopped flying with Singapore Airlines
I did fly United Airlines. Sometimes, I earned some special bonus miles but I did not fly to US so frequent
I used to fly Lufthansa to Germany, and Europe and I keep flying when I go to Germany when I need to fly without stopover to other cities(to visit friends or travel), earn mileages when I book hotels directly all over the world, if I want to go to Thailand and have chances to fly Thai Airways, I can still use it.
Conclusion: if you travel in Asia more frequent and if YOU REALLY NEED TO STICK WITH STAR ALLIANCES CARRIERS, I would say Thai Airways or Singapore Airlines, ANA only if you are big fans of Japan
Thai Airways:-
cities such as Bangkok, Phuket...(all Thailand destination), Taipei, Seoul, Australia via Bangkok, Europe/UK via Bangkok
Singapore Airlines:-
cities such as Singapore, San Francisco, via Singapore to destination such as Malaysia, Australia, Europe/UK
ANA:-
cities such as Tokyo, Osaka, cities within Japan, Europe/UK, US via the mentioned two cities
By the way, mostly, you have to present your membership card when you check-in or when you book your ticket(s). However, KEEP YOUR BOARDING PASS, TICKETS and contact the membership of the airline that you want to join, see if they can assist you like their standard members.