I tried to make a booking ARN-LPA/TFN-ARN on random dates over the winther season, and there are no available connections according to the JK-site.
Funny, as Spanair started out as a carrier for transporting scandinavians to Spain for the holidays! How many leisure travellers go to Madrid and back in the winter?
IB has some pretty good A340 c-class deals MAD-TFN-MAD, so maybe I will look in to that