Singapore Airlines Limited (SIA) (Chinese: 新加坡航空公司; pinyin: Xīnjiāpō Hángkōng Gōngsī, abbreviated 新航; Malay: Syarikat Penerbangan Singapura; Tamil: சிங்கப்பூர் ஏர்லைன்ஸ்) (SGX: C6L) is the national airline of Singapore. Singapore Airlines operates a hub at Singapore Changi Airport and has a strong presence in the Southeast Asia, East Asia, South Asia, and "Kangaroo Route" markets. The company also operates trans-Pacific flights, including two of the world's longest non-stop commercial flights from Singapore to Newark, New Jersey and Los Angeles, California on the Airbus A340-500. Singapore Airlines was the launch customer of the "superjumbo" Airbus A380.

Singapore Airlines was ranked 17th in Fortune's World’s Most Admired Companies rankings in 2007 and has built up a strong brand name as a trendsetter in the aviation industry, particularly in terms of innovation, safety and service excellence,coupled with consistent profitability. It has won numerous awards and is an industry bellwether for aircraft purchases. The airline was Asia's first and the world's third airline to be accredited by IATA with the IOSA (IATA Operations Safety Audit).