Hi everyone,

I mostly fly ST and whenever necessary *A, but will have to do some legs in ow in my upcoming holidays with LAN Peru in domestic flights.
Although it's not much (only around 1500 miles flights), I'd prefer not to waste them and put them in a FF account. I would therefore like to ask the community for some help in choosing the most suitable FF programme to my travel profile within ow:

• I mostly fly within Europe (between Portugal and Italy) and from Europe to NY;
• I generally fly in Y (not the most discounted fare, but not full Y either);
• As I mostly fly on ST (and *A secondarily), the best programme would be one in which miles did not expire (such as, eg, AF/KL's FB, in which one only has to fly once in every 3 years to keep the miles in the account).

Thank you in advance!