When flying with Scandinavian Airlines (SAS), understanding how early you can check-in is essential for a smooth and timely departure. SAS offers passengers a flexible and efficient check-in process through multiple channels including online check-in, mobile app check-in, self-service kiosks, and traditional airport counters. The most convenient method is online check-in, which opens 30 hours before the scheduled departure time for most flights and closes 1 hour before departure. For flights to and from the United States, the online check-in window opens 24 hours before departure. You can check-in online via the official SAS website or through the SAS mobile app by entering your booking reference and last name. Once checked in, passengers can select or change seats, add frequent flyer numbers, and receive a digital boarding pass, which can be printed or saved to a smartphone. This process is highly recommended for travelers with carry-on baggage only, as it allows them to skip airport check-in counters and head directly to security, reducing time spent in queues and overall stress. For those with checked baggage, passengers can still check-in online and use dedicated bag drop counters at the airport, which typically open 2 hours before departure for European flights and 3 hours before long-haul or intercontinental flights. At major SAS hub airports like Copenhagen (CPH), Stockholm Arlanda (ARN), and Oslo Gardermoen (OSL), automated self-service kiosks are also available for printing boarding passes and baggage tags, further speeding up the process. Airport check-in counters for SAS open at similar times—around 2 to 3 hours before scheduled flight time—and close 45 minutes before departure for flights within Europe and 60 minutes prior for intercontinental services. To avoid last-minute delays, passengers are advised to arrive at the airport at least 2 hours early for European flights and 3 hours early for international flights, especially during peak travel periods. SAS also offers priority check-in lanes for SAS Plus, SAS Business, and EuroBonus Gold or Diamond members, ensuring a faster and more comfortable check-in experience. Travelers needing special assistance, such as unaccompanied minors, those traveling with pets, or passengers requiring mobility help, should check-in at the airport counter earlier than the standard times to allow staff sufficient time to assist. Boarding for SAS flights typically starts 30 to 45 minutes before departure, and boarding gates usually close 15 minutes before takeoff, making punctual arrival at the gate essential, even if you have already checked in online. In summary, you can check-in for your SAS flight as early as 30 hours before departure online, or at the airport 2–3 hours prior, depending on your route. Choosing early check-in, especially via the website or app, ensures a faster, smoother start to your journey and helps avoid unnecessary delays, whether flying across Europe or on long-haul international routes.