Singapore Airlines includes many airline-related subsidiaries. SIA Engineering Company handles maintenance, repair, and overhaul (MRO) business across nine countries, with a portfolio of 27 joint ventures, including with Boeing and Rolls-Royce. Singapore Airlines Cargo operates SIA's freighter fleet and manages the cargo-hold capacity in SIA's passenger aircraft. It has two subsidiaries: SilkAir operates regional flights to secondary cities, while Scoot operates as a low-cost carrier.
Singapore Airlines was the launch customer for the Airbus A380 - the world's largest passenger aircraft - as well as the Boeing 787-10 and the ultra long range version of the Airbus A350-900. It ranks amongst the top 15 carriers worldwide in terms of revenue passenger kilometers,[ and is ranked 10th in the world for international passengers carried.Singapore Airlines was voted as the Skytrax World's Best Airline Cabin Crew 2019. The airline also won the 2nd and 4th position as the World's Best Airlines and World's Cleanest Airlines respectively for 2019.