北欧航空（Scandinavian Airlines, SAS）是一间服务北欧三国──挪威、丹麦及瑞典──的航空公司，由SAS集团持有，总部设于瑞典斯德哥尔摩。北欧航空是星空联盟的创会成员。其枢纽机场包括斯德哥尔摩－阿兰达机场、哥本哈根机场和奥斯陆国际机场。常旅客计划：EuroBonus（普卡、银卡、金卡、钻石卡）；年旅客运输量：28,600,000人次（截至2014年12月）；通航航点：125个（截至2014年10月）；飞机数量：138架（截至2014年10月）；日航班量：875/日/架次（截至2014年10月）；员工数量：12,262人（截至2014年10月）

Scandinavian Airlines or SAS, previously Scandinavian Airlines System, with the legal name Scandinavian Airlines System Denmark-Norway-Sweden, is the flag carrier of Sweden, Norway and Denmark, and the largest airline in Scandinavia.

Part of the Scandinavian Airlines System Aktiebolag and headquartered at the SAS Frösundavik Office Building in Solna, Sweden, the airline operates 182 aircraft to 90 destinations. The airline's main hub is at Copenhagen-Kastrup Airport, with connections to over 50 cities in Europe. Stockholm-Arlanda Airport (with more than 30 European connections) and Oslo Airport, Gardermoen are the other major hubs. Minor hubs also exist at Bergen Airport, Flesland, Gothenburg-Landvetter Airport, Stavanger Airport, Sola and Trondheim Airport, Værnes. While SAS Cargo is an independent and wholly owned subsidiary to Scandinavian Airlines. SAS Cargo has its main office at Copenhagen Airport.