I think there is some sort of blocking still in effect. I am trying to book a business class flight for SFO - LHR - ARN. The best option is a United flight to LHR and then a SAS flight to ARN. Those are the two options that are showing up for ANA and AC, both at the Saver reward level.

For United, they want you to do a connection via Frankfurt, so it would be SFO - LHR - FRA - ARN, and in that case, all European flights would be on LH. I've called in a few times now and the agents can't see any availability on the SK flight.

Not sure what's going on!