This has been discussed in the SK forum for a few days. You will find details (including travel period) there, but mind you that fares to all other destinations than NYC (LGA) were increased yesterday by approx SEK 1.000

No longer attractive fares unless you originate in Stockholm/Sweden.
http://www.flyertalk.com/forum/showt...=789873&page=2
Unfortunately, NYC involves a long layover of approx 6 hours in PHL both ways.
Can be booked on i.a. easyt.se, seat24.se and mrjet.se
Does not work in reverse, i.e. from the US to ARN r/t.