I'm traveling in economy to the US in a couple of months. it's a multi city itinerary with the first leg being ARN-EWR. The cheapest ticket on united.com starts with a fare quoted as Economy (S) (SLRCSKAW) on "United 9369" which is the code share for the SAS flight.

According to the SAS website, S is Economy extra. Would this mean that this an Economy Extra leg of the journey or is this Low economy S from United eventhough it's an SAS flight?

Thanks!