To check in for Scandinavian Airlines (SAS), you can follow these steps:

1. Online Check-in: 

SAS offers online check-in, which is a convenient and time-saving option. You can check in online from 22 hours up to 1 hour before your flight departure time. Here's how to do it: 
a. Visit the Scandinavian Airlines website or use their mobile app. 
b. Click on the "Check-in" or "Manage booking" option. 
c. Enter your booking reference or e-ticket number along with your last name. 
d. Follow the prompts to select your seat, add baggage if needed, and complete the check-in process. 
e. Once you have finished, you can either print your boarding pass or receive it electronically on your mobile device.

2. Airport Check-in: 

If you prefer to check in at the airport, you can do so by following these steps: 
a. Arrive at the airport well in advance of your flight departure time. It is generally recommended to arrive at least 2 hours before a domestic flight and 3 hours before an international flight. 
b. Locate the SAS check-in counters or self-service kiosks at the airport. Look for signs or ask airport staff for assistance if needed. 
c. If you have luggage to check in, proceed to the designated baggage drop-off counter after completing the check-in process. 
d. Present your valid travel documents, such as your passport or identification card, and provide the necessary information to the SAS staff. e. Once the check-in process is complete, you will receive your boarding pass.