Originally Posted by
Goldorak
Are you sure you don't earn M&M miles in this case ? I think yes, because M&M is the FFP program of OS.
No, you don't earn any miles.
It is not enough in *A to be on a codeshare and using the native FFP of the codeshare partner. Hence no M+B miles when flying A3 operated by EY in my example, and no M&M miles when flying OS operated by AF. In Star Alliance programmes, it has to be coded AND operated by *A to earn.