Originally Posted by citiflyerUK

From January I will start flying with SAS almost every week LHR-ARN (Fri-Sun). Up until now I've used BA but the SAS flights are cheaper and better times.

I'll fly a mix of SAS Go light and SAS Plus. Who is the best Star Alliance carrier to credit the flights to? I'd like to get to Star Alliance Gold so then I can use the lounges in Economy.