In the SAS calendar it says "the trip must start in SWE,NOR,DK" but FIN not mentioned when I looked at the bonus points offer to Milan/Rome. However, when trying to book I noted that the points needed were the same even starting from Finland (for only limited number of connections).
Sadly, the offer being attractive, I could not find suitable days to fit (weekends for example), or I was late and the best options were gone during early morning hours...