Greetings fellow mileage enthusiast! IMHO, if you fly JJ you can credit to any one world under the JJ designation. If you fly SAA, then it's star alliance. Please someone correct me if I have this wrong, as I am seriously thinking of going from GRU-JNB solely for the 20% Elite Qualifying Dollars you get with mileage on AA (which is a lot more than if you purchased an AAA ticket0-the beauty of buying a good priced ticket in business and crediting it to AA, it's Mileage for ED$ - as well as Emiles.) .