SAS offers several ways for passengers to upgrade their seats to the higher-class cabins of the aircraft. Travelers can use the miles, pay in cash during check-in or place a bid through the official website. The SAS Upgrade depends on the seat availability on the higher class cabins. If you need assistance with upgrades, you can contact SAS customer service or read the blog by Airlines Group Travel at the mentioned link.
Read more: https://www.airlinesgrouptravel.com/blog/how-do-you-upgrade-on-sas-scandinavian-airlines