Scandinavian Airlines or SAS is the flag carrier of Denmark, Norway, and Sweden, and the largest airline in Scandinavia. Part of the SAS Group and headquartered at Stockholm Arlanda Airport (ARN) in Sigtuna, Sweden, the airline operates 182 aircraft to 90 destinations. The airline's main hub is Kastrup or Copenhagen Airport, which is the main European and intercontinental hub. Somewhat hubs also exist at Oslo Airport, Gardermoen and Stockholm-Arlanda Airport.