No, Star Silver does not allow you to upgrade to business class - if it did, then who would buy business class?

If your flight is cancelled or something, they might give you an upgrade, but you can't really count on that and it is a rare occurence anyway.



When you sign up for Aegean Airlines miles and Bonus, you will recieve a number. You should keep this number, since you will need it for all your star alliance flights


If you use Aegean Airlines' transfer service, then yes you will recieve miles. That said, I didn't know that aegean Airlines had a transfer service . Link please?