I have not flown Skyteam airlines for more than a decade. A few days ago, I bought the super crazy deal from Zurich to SFO for less than $2000 on biz class. I am based in San Jose, CA and SFO. My travel patterns are:
-domestic: mostly within CA (SW, Jetblue, or Alaska). Very rarely do I travel to NYC, BOS, or ORD. 6-10x per year
-Canada: only for flight positioning, if I find an excellent deal to Europe or Asia from Canada. 0-2x per year
-Europe: sometimes I travel within the continent, using whichever airline (mainstream or low-cost) that offers a good fare and convenient timing, 2-6x per year
-Asia: sometimes I travel within the main business hubs (Singapore, Hong Kong, Bangkok...), using mainstream airlines, 2-4x per year
So, since I don't loyally fly SkyTeam airlines and that Delta seems to offer an awful mileage program, I would appreciate advice on the program (with generous expiration policy) that I should join. Thanks!