SilkAir (Singapore) Private Limited is a regional airline with its head office in Airline House in Singapore; previously it was on the fifth storey of the SIA Superhub in Singapore. It is a wholly owned subsidiary of Singapore Airlines and operates scheduled passenger services from Singapore to 51 cities in Southeast Asia, the Indian Subcontinent, China and Australia.

As the regional wing of Singapore Airlines, it serves the short-haul destinations in the Singapore Airlines Group network. For the year ending 31 March 2015, the airline flew over 3.5 million passengers and made an operating profit of S$40.8 million.

As of 31 March 2016, SilkAir employs 1,573 staff.

The airline had its roots as a regional air-charter company as Tradewinds Charters formed in 1975, serving leisure destinations using planes predominantly leased from parent airline Singapore Airlines. Scheduled services were introduced as Tradewinds Airlines on 21 February 1989, when it leased McDonnell Douglas MD-87 aeroplanes for services to 6 destinations: Pattaya, Phuket, Hat Yai and Kuantan from Singapore's Changi International Airport and Tioman from Singapore's Seletar Airport. As the carrier matured, regional business destinations such as Jakarta, Phnom Penh and Yangon were added to its network, thereby broadening the airline's appeal beyond the holiday-maker to include the business traveller.

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