Originally Posted by RedChili

It's important to realize the difference between a voluntary rebooking of a flight that hasn't been cancelled yet, and a flight that actually is cancelled.

Concerning the voluntary rebooking, a part of the SAS info says: "You can rebook to a SAS flight on another date to the same destination if the same service class as the original ticket is available. The new date of travel may not be earlier than 06May until 30 September 2019." That could be interpreted to mean that there must be award space available if you want to rebook a flight voluntarily.

But if a flight has actually been cancelled and you show up at the aiport, SAS will need to rebook you onto any flight that will get you to your destination.