Aviation in Singapore is a key component of the Singaporean economy. Besides currently the sixth busiest airport and the fourth busiest air cargo hub in Asia, the Singaporean aviation industry is also a significant aerospace maintenance, repair and overhaul centre.

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The aviation industry is a significant contributor to the Singapore economy.^[1] In 2009, it contributed S$14.2 billion (5.4%) in direct and in-direct value-add to the Singaporean GDP. This included S$8.7 billion of direct contribution from the sector, S$3.1 billion through indirect contributions from the sector's supply chain and S$2.4 billion from consumer spending by employees of the aviation sector and its supply chain. 58,000 direct jobs were available in the industry, rising to 119,000 jobs if the entire supply chain is included. Out of the 58,000 direct jobs, aerospace manufacturing companies employed approximately 18,000 people, airline companies employed 15,000, while 24,000 worked in the airports and ground service companies. The sector also directly contributed S$1.5 billion in taxes in 2009.^{[citation needed]}

Airlines registered in Singapore were also major contributors to the economy, employing over 15,000 in Singapore and providing a further 11,000 jobs in the supply chain in 2009. Overall, these airlines contribute over S$5.5 billion to the economy and supported 34,000 jobs in Singapore.^{[citation needed]}

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In 1937, the Wearne Brothers launched the first commercial air service between Singapore and Malaya. It was called Wearne Air Services. On 28 June 1937, a de Havilland Dragon Rapide aircraft, the Governor Raffles, took off from Singapore to Kuala Lumpur and Penang. It was the inaugural commercial air service between these three cities by Wearnes Air Services. The WAS services ceased with the onset of World War II Japanese occupation of Malaya and Singapore. After the war, the air service was not continued.

Malayan Airways Limited (MAL) was established on 1 May 1947, by the Ocean Steamship Company of Liverpool, the Straits Steamship Company of Singapore and Imperial Airways. The airline's first flight was a chartered flight from the British Straits Settlement of Singapore to Kuala Lumpur on 2 April 1947 using an Airspeed Consul twin-engined aeroplane. Regular weekly scheduled flights quickly followed from Singapore to Kuala Lumpur, Ipoh and Penang from 1 May 1947 with the same aircraft type. The airline continued to expand during the rest of the 1940s and 1950s, as other British Commonwealth airlines (such as BOAC and Qantas Empire Airways) provided technical assistance, as well as assistance in joining IATA. By 1955, Malayan Airways' fleet had grown to include a large number of Douglas DC-3s, and went public in 1957. Other aircraft operated in the first two decades included the Douglas C-54 Skymaster, the Vickers Viscount, the Lockheed 1049 Super Constellation, the Bristol Britannia, de Havilland Comet 4 and the Fokker F27. In 1957, the airline became a state-run stock corporation.

When Malaya, Singapore, Sabah and Sarawak formed the Federation of Malaysia in 1963, the airline's name was changed, from "Malayan Airways" to "Malaysian Airways". MAL also took over Borneo Airways. In 1966, following Singapore's separation from the federation, the airline's name was changed again, to Malaysia-Singapore Airlines (MSA). The next year saw a rapid expansion in the airline's fleet and route, including the purchase of MSA's first Boeing aircraft, the Boeing 707s, as well the completion of a new high-rise headquarters in Singapore. Boeing 737s were added to the fleet soon after.

MSA ceased operations in 1972, when political disagreements between Singapore and Malaysia resulted in the formation of two entities: Singapore Airlines and Malaysian Airlines System. Singapore Airlines kept all 10 of MSA's Boeing 707s and 737s, retained the international routes out of Singapore as well as the existing corporate headquarters in the city, with J.Y. Pillay, former joint chief of MSA as its first chairperson. Female flight attendants continued to wear the sarong kebaya uniform, which had been first introduced in 1968. A local start-up advertising company, Batey Ads, was given the right to market the airline, eventually selecting the sarong and kebaya-clad air stewardesses as an icon for the airline and calling them Singapore Girls.

As a result of an almost non-existent domestic market, Singapore has to place immediate emphasis on opening up the international market for its own airlines, as well as to allow foreign airlines to establish operations there. Singapore has Air Services Agreements with over 90 countries and territories,^[2] and has the most liberal aviation policy in Southeast Asia^[3] It has been an active advocate of open skies, and has concluded over 30 Open Skies Agreements, 18 of which are in the European Union, two in the Association of Southeast Asian Nations, five out of six members of the Cooperation Council for the Arab States of the Gulf, two in the Union of South American Nations and four members of the Pacific Islands Forum.

On 9 June 2006, it became the first Asian country to conclude a "horizontal" aviation agreement with the European Union.^[4][5] On 2 October 2007, Singapore became the second country to be allowed cabotage rights within the United Kingdom in a fully liberal aviation agreement.^[6] Singapore was also the first Asian country to conclude an Open Skies Agreement with the United States in 1997,^[7] and has significant liberal agreements with the United Arab Emirates.

Air service rights between Singapore-based carriers are allocated by the Air Traffic Rights Committee, established on 3 October 2003 in reaction to the awarding of multiple Air Operators Certificates in Singapore.^[8] The ATRC allocates air rights with a five-year validity. Unused rights for periods exceeding six months rights awarded but subsequently unable to meet pre-determined performance criteria will be returned to the pool for reallocation. Incumbent Singapore Airlines and its subsidiary airlines were allowed to retain all of their existing rights up to 2013, after which they will also carry a five-year validity and be subjected to the "use-it-or-lose-it" principle.

Partly in response from competition from AirAsia based in neighbouring Malaysia, Singapore-based low-cost airlines only began to operate from the year 2004 when Valuair launched its maiden flight on 5 May 2004. In rapid succession, two of the largest airlines operating out of Singapore Changi Airport began operating their competing carriers, namely Singapore Airlines' Tiger Airways and Qantas' Jetstar Asia Airways, who began commercial flights on 15 September 2004 and 25 November 2004 respectively. A planned Singapore-affiliated airline by AirAsia was scuttled when it failed to obtain an air operator's certificate from the Singaporean authorities, possibly in retaliation to the Indonesian ban on all new low-cost flights into the country by non-Indonesian carriers.^[60]

The physical size of Singapore meant practically all low-cost air routes have to be international in nature, imposing greater risks on the airlines with the greater dependence on aviation negotiations between Singapore and its markets. With relatively limited air rights on offer in the Southeast Asian region, the three airlines had to contend with flying to a select number of destinations where air rights are available, resulting in intense, direct competition on specific routes. The Singapore-Bangkok sector, for example, saw all three Singapore-based carriers, as well as AirAsia flying the route prior to market consolidation. The airlines were able to take advantage of subsequent liberation of air rights between Singapore, Brunei and Thailand^[61] in late 2004, although key destinations such as Kuala Lumpur remain closed to all low-cost airlines.

With soaring fuel prices, limited markets, and the impact from the 2004 Indian Ocean earthquake, the low-cost aviation industry went into a consolidation phase, with Valuair, the only low-cost airline without a major stakeholder, becoming the first casualty when it was merged with Jetstar Asia Airways on 24 July 2005. The airline was still operated like a separate airline, however, due to regulatory restrictions on its flights to Indonesia, where Jetstar Asia had no access after the Indonesian ban.

The fiscal fortunes of the two remaining players began to diverge, however, when it became apparent that Jetstar Asia was struggling, while Tiger Airways was doing relatively well.

Keen interest by low-cost carriers to serve the highly protected Singapore-Kuala Lumpur market was one of the primary reasons in bringing forward a partial liberation of the route despite possible business impact particular on Malaysia Airlines. Both countries inked an agreement on 23 November 2007 to allow up to two flights a day for low-cost carriers from each country from 1 February 2008. The route will be fully liberalised on 1 December 2008, with a possibility of opening up other routes between Singapore and secondary Malaysian cities in planned meetings in early 2008.^[62]

Based out of Seletar Airport (WSSL), Singapore provides the South East Asian hub for corporate aircraft sales and servicing. Although presently limited by runway length for operations of ultra-long range aircraft, Seletar offers corporate aircraft owners limited access to Singapore and to manufacturer approved service centres, such as Jet Aviation (for Gulfstream Aerospace, Bombardier and Cessna) and Hawker Pacific (Hawker Beechcraft and Dassault Falcon). Seletar airport is open 24 hours a day.

Seletar is also the home base for several smaller charter aircraft operations serving regional corporate travel and aeromedical evacuations as well as charter brokers such as Singapore Aviation^[63] and aviation consultancies specialising in regional aircraft ownership and operation Asian Corporate Aviation Management Asia Corporate Jet.^[64][65]

In September 2017, Zetta Jet USA, Inc., an affiliate of Singapore-based Zetta Jet, filed for Chapter 11 bankruptcy protection in Los Angeles, California. The company has been focused on long-haul, luxury air charter.^[66]

Security for the country's three international passenger airports comes under the purview of the Airport Police Division of the Singapore Police Force, although resources are concentrated at Singapore Changi Airport where scheduled passenger traffic dominates. Seletar Airport, which specialises in handling non-scheduled and training flights, is seen as posing less of a security issue. Since the September 11, 2001 attacks, and the naming of Changi Airport as a terrorism target by the Jemaah Islamiyah, the airport's security has been stepped up. Roving patrol teams composed of two soldiers and a police officer armed with machine guns patrol the terminals at random.

Assisting the state organisations, are the security services provided by the ground handlers, namely that of the Singapore Airport Terminal Services's SATS Security Services, and the Aetos Security Management Private Limited, formed from a merger of the Changi International Airport Services's airport security unit and that of other companies to become a single island-wide auxiliary police company. These officers man check-in counters to screen luggage, control movements into restricted areas, and so forth.

Since 2005, an upgrade in screening technology and rising security concerns led to all luggage-screening processes to be conducted behind closed-doors. Plans are also in place to install over 400 cameras around the airport to monitor passenger activity around the clock and to check on suspicious parcels and activity to prevent bomb attacks similar to the 2005 Songkhla bombings in Southern Thailand where Hat Yai International Airport was targeted. Tenders to incorporate such a system was called in late September 2005.^[67]

• Airport Logistics Park
• Asian Aerospace
• Civil Aviation Authority of Singapore
• Seletar Airport
• Singapore Changi Airport