Interestingly this is very US specific. the big European legacy carriers have way worse frequent flyer programs. Living in Germany, the obvious choice of FFP wo

Interestingly this is very US specific. the big European legacy carriers have way worse frequent flyer programs. Living in Germany, the obvious choice of FFP would be Lufthansa where status is incredibly hard to obtain without flying Business or First and then the benefits are small then with US programs - for example no complimentary updates. Lufthansa rather flies an empty Business cabin then upgrading someone. (With the exception that you get domestic lounge access too)