I'm about 40 days out from a short trip SK927 CPH-BOS / SK928 BOS-CPH booked by my employer in Economy (Q).

I've been checking upgrade bin minimums daily for about a week, and will try to continue if time allows.

On both outbound and inbound, the minimum bid from Economy to Plus has been static at 2,500SEK or 14,000 points; Economy to Business is static 7,000SEK or 37,000 points.

However, for just one day 46 days before departure, the minimum bids to upgrade the inbound overnight flight dropped: Economy to Plus dropped to 1,500SEK or 13,000 points while Economy to Business dropped to 4,200SEK or 33,000 points. They reverted to the higher minimums the next day.