Originally Posted by
gillesMa
However, I cannot find those flights on SAS or AF websites, nor on any comparison websites (skyscanner, momondo, kayak, etc.).
...
Do you see a reason why these flights cannot be booked?
For problems like this, what I usually do is to go to
ITA, switch off (uncheck) the availability checker, and try to get a price. If you can't get a price for a particular routing even when availability is being ignored, then it suggests that there are no valid fares even though the airlines publish the connection (for reasons best known to themselves).
This, I think, may well be what the case is here: there are no valid fares for this routing.