Sultan Abdul Aziz Shah Airport (IATA: SZB, ICAO: WMSA) — formerly Subang International Airport/Kuala Lumpur International Airport, often called Subang Airport — is an airport located in Subang, Petaling District, Selangor, Malaysia.

Subang International Airport served as Kuala Lumpur's main airport from 1965 to 1998, before the Kuala Lumpur International Airport (KLIA) in Sepang was opened. Although plans existed to convert the airport into a low-cost carrier base, the change was opposed by Subang Jaya residents. The airport was repurposed to serve general aviation as well as turboprop domestic and international flights. In 1996, the airport was renamed after Sultan Salahuddin Abdul Aziz Shah Al-Haj (Salahuddin of Selangor), the eleventh Yang di-Pertuan Agong of Malaysia and eighth Sultan of Selangor.

Subang Airport is currently the base for SKS Airways and Firefly commercial turboprop services. Raya Airways is the only other non-passenger non-turbo prop aircraft landing and utilising Subang Airport Terminal 2. While heavily opposed by Ara Damansara residents of the noise of the jet engines, Raya Airways still operates out of SZB servicing DHL and other local hubs.

Work on the Subang International Airport started in 1961 and finished in 1965 at a cost of $64 million. Its design consisted of a roof composed of floating concrete shells that was held aloft by mushroom-shaped columns. Partners in the Booty Edwards Architectural practice Kington Loo and C.H.R Bailey are typically attributed with the design. The open structure also featured a massive circular ramp, reminiscent of Berthold Lubetkin's penguin pavilion in London. Most of the structure was removed during a major reconstruction in 1983.

The airport was officially opened to traffic on 30 August 1965 and had the longest runway (3,780 m (12,401 ft 7 in) long, 45 m (147 ft 8 in) wide – runway 15 – 33) in Southeast Asia, replacing Sungai Besi Airport. By the 1990s, the airport had three terminals – Terminal 1 for international flights, Terminal 2 for Singapore – Kuala Lumpur shuttle flights by Singapore Airlines and Malaysia Airlines, and Terminal 3 for domestic flights. Toward the end of service, the airport suffered at least two major fires that forced traffic to be diverted to other airports. In 2003, terminal 1 was demolished.

In July 2002, AirAsia began flying from KLIA, and in 2004, AirAsia considered utilising the airport as a primary operating base in Malaysia. Since Firefly started operations in the airport, AirAsia has been lobbying the government to allow AirAsia to use Subang Airport. As of December 2007, the government still maintains its policy of only allowing general aviation and turbo-prop flights out of Subang Airport. The airport underwent renovation works at Terminal 3 from February 2008 and was finished in October 2009. Terminal 3 was renamed to Subang Skypark.

Raya Airways, a national cargo carrier, chose Subang Airport as its main cargo operation center. Several companies offer chartered flights and helicopter services from the airport. One of the largest FBO (Fixed-Base Operator) in the region (with covered hangar space of more than 100,000 sq ft (9,290 m)), Dnest Aviation Services is also based in this airport. Their newest hangar boasts a "first of its kind" infrastructure capable of taking in either a 737 BBJ or A319 ACJ and 2 basement floors directly underneath it with ample of office space, lecture rooms, carpark and a cafeteria. A number of flying clubs are also located at Sultan Abdul Aziz Shah airport, the most famous of these being Subang Flying Club, Air Adventure Flying Club, Eurocopter (An EADS Company), ESB Flying Club (Eurodynamic Sdn Bhd). With Eurocopter, the airport serves as a maintenance and support facility for Malaysian Maritime Enforcement Agency helicopters.

Berjaya Air's head office is in the Berjaya Hangar in the SkyPark Terminal Building. Previously the head office was in Terminal 3. Transmile Air Services has its head office in the Transmile Centre in the Cargo Complex. The main headquarters of Malaysia Airlines was previously in Subang, consisting of administrative departments & its maintenance, repair and overhaul subsidiary, MAS Aerospace. In addition, another MAS subsidiary, Firefly also operates a fleet of ATR 72 out of Subang.

Apart from that, Sultan Abdul Aziz Shah Airport was to be a hub for Global Flying Hospitals, but the humanitarian medical charity made the decision to close down Malaysian operations, stating that the elements to make the correct formula for the GFH model were not present.

On 4 December 2007, Subang SkyPark Sdn Bhd announced a RM 300 million plan to transform the Terminal 3 building into an ultra-modern general and corporate aviation hub. The plan includes upgrading the terminal, creating a regional aviation center and establishing a commercial nexus. Under an agreement with Malaysia Airports, Subang Skypark will serve private aviation while Malaysia Airports will serve Berjaya Air and Firefly Airlines. Subang Skypark recently signed a lease agreement with Malaysia Airports for the land for the airport in Langkawi. The next day, VistaJet, a business jet service provider, announced that it would use the airport as a base of operations in Malaysia. It chose Terminal 3, which is being operated by Subang Skypark to be the hub in Asia.

The operator announced that construction work for a 9,000 square feet (836 m), five-star executive lounge would begin in February 2008. The construction works was awarded to ArcRadius Sdn Bhd. It was expected that the lounge works would be done by end of March 2008. The transformation plans also calls for a construction of two 42 meters (137 ft 10 in) by 47 meters (154 ft 2 in) maintenance, repair and overhaul hangars and ten 36-meter (118 ft 1 in) by 36-meter (118 ft 1 in) parking hangars. The construction of the MRO hangars was scheduled to be complete by end of 2008, while two of the ten parking hangars were to be complete by the end of 2009.

On 8 August 2008, VistaJet Holding SA started operations from the airport. It provides private jet travel from Malaysia to anywhere in the world.

Subang Airport underwent a RM40 million facelift on the check-in terminals. The facelift did nothing much to address the lack of parking spots, although a valet service is provided. Parking cost RM25 on daily basis. A rail link was added in 2018 to connect to the airport to Kuala Lumpur Sentral via KTM Komuter; travellers can also catch a local bus out of Central Market bus hub.

The airport was officiated by Prime Minister Datuk Seri Najib Tun Razak on 28 October 2009. He expressed confidence that the airport will reach 2 million annual passenger and emerge as a regional hub of ASEAN.

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The next phase of development will entail the refurbishment of the former Terminal 2 (T2) of the SAAS airport into an extension of the SkyPark Terminal 3. Works are scheduled to commence end of 2017 with an estimated construction period of 24 months. The combined capacity of T2 and T3 will be 5 million passengers.

With a retail extension of 29,729 m (320,000 sq ft), the project will include airport facilities and services and a multilevel car park of 32,516 m (349,999 sq ft) with 1,155 bays. The extension will also include an entertainment / event deck that overlooks the runway, a first of its kind, open to public, in Malaysia.

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Skypark Commercial Nexus is a mixed development commercial project sited on a 5.13-hectare (12.7-acre) plot adjoined to the main terminal. Among the proposed highlights of the Nexus would be a hotel, entertainment outlets, aviation museum and an aviation theme park (subject to approval from authority). A multi-storey car park is also included. Construction work is expected to commence in early 2014. The upcoming railway line is planned to connect SkyPark Nexus to Subang Jaya KTMB station.

Airlines	Destinations
AirAsia	Kota Kinabalu, Kuching
Batik Air Malaysia	Kota Bharu, Penang
Berjaya Air	Charter: Hua Hin, Koh Samui, Langkawi, Pangkor, Redang, Tioman
Firefly	Alor Setar, Johor Bahru, Kota Bharu, Kota Kinabalu, Kuala Terengganu, Langkawi, Penang, Singapore–Seletar
Loong Air	Guangzhou
Scoot	Singapore
TransNusa	Jakarta–Soekarno-Hatta

Airlines	Destinations
My Jet Xpress Airlines	Jakarta–Soekarno-Hatta, Singapore
Raya Airways	Bangkok–Suvarnabhumi, Hanoi, Ho Chi Minh City, Hong Kong, Jakarta–Soekarno-Hatta, Kota Kinabalu, Kuching, Labuan, Miri, Nanning, Phnom Penh, Singapore

Annual passenger numbers and aircraft statistics

Year	Passengers handled	Passenger % change	Cargo (metric tonnes)	Cargo % change	Aircraft movements	Aircraft % change
1994	11,343,648		262,053		137,871
1995	12,776,877	12.6	325,871	24.4	146,248	6.1
1996	14,556,879	13.9	372,339	14.3	163,493	11.8
1997	15,819,863	8.7	413,695	11.1	162,652	0.5
1998	8,263,930	47.8	166,794	59.7	88,882	45.3
1999	1,999,302	75.8	14,069	91.6	27,753	68.8
2000	2,100,727	5.1	15,893	13.0	38,129	37.4
2001	1,955,688	6.9	14,445	9.1	35,691	6.4
2002	1,130,169	42.2	12,261	15.1	28,170	21.1
2003	72,491	93.6	14,358	17.1	19,616	30.4
2004	90,593	25.0	18,670	30.0	22,757	16.0
2005	83,602	7.7	46,082	146.8	29,668	30.4
2006	83,502	0.12	71,953	56.1	36,626	23.4
2007	95,583	14.5	63,382	11.9	44,302	21.0
2008	307,747	222.0	18,473	70.8	46,989	6.1
2009	819,840	166.4	18,536	0.3	55,148	17.4
2010	1,118,309	36.4	19,988	7.8	63,616	15.3
2011	1,320,227	18.0	19,928	0.3	68,135	7.1
2012	1,442,514	9.3	22,680	13.8	74,008	8.6
2013	1,859,020	28.9	26,443	16.6	80,047	8.2
2014	2,762,556	48.6	28,128	6.4	91,529	14.3
2015	3,059,144	10.7	31,357	11.5	95,845	4.7
2016	2,834,836	7.3	36,147	15.3	94,544	1.4
2017	2,880,586	1.6	36,568	1.2	98,955	4.7
2018	1,964,059	31.8	32,284	11.7	80,775	18.4
2019	2,259,595	15.0	34,648	7.3	80,606	0.2
2020	949,934	58.0	58,260	68.1	49,454	38.6

There is a taxi booth inside the terminal building, so arriving passengers can directly go to the booth and get on a taxi.

Buses from Subang Skypark towards Pasar Seni (Central Market) in Kuala Lumpur city center are Rapid KL bus No. 772 (also stops at Asia Jaya LRT station and KL Sentral). The bus ticket costs RM2.50 (Asia Jaya) & RM3.00 (Pasar Seni), and the route operates from 6:00 am till midnight.

To serve the newly opened Kelana Jaya extension line and MRT Kajang Line, there is a Rapid KL feeder bus No. T773 route between Ara Damansara LRT Station and Subang Skypark and MRT feeder bus No. T804 route between Kwasa Sentral station and Subang Airport. Fares are fixed at RM1.00.

Feeder bus no.	Station name	Line name
T773	Ara Damansara	Kelana Jaya Line
T804	Kwasa Sentral	Kajang Line

There is also a bus shuttle service between Subang Skypark and Kuala Lumpur International Airport KLIA & KLIA2. The service departs from Subang Skypark from 5am until 7pm. The one-way journey takes around one hour (subject to traffic) and costs RM10 per passenger.

A KTM Komuter shuttle service connecting KL Sentral through Subang Jaya to the terminal was operated between 1 May 2018 to 15 February 2023. This extension is a branch line of the Port Klang Line and provided rail connectivity to the airport that is currently only served by other kinds of road transportation. The line is 26 km long and has three stations: KL Sentral, Subang Jaya, and Terminal Skypark with two planned stations - Glenmarie, Sri Subang. However, the Subang Skypark airport train system was suspended from 15 February 2023 due to the low ridership.

• 11 May 1976 – British Airways Flight 888, a Boeing 747-100 from London to Melbourne via Bahrain, Bangkok and Kuala Lumpur, was on approach to Runway 15 when it flew below the normal flight path, hitting trees 2.2 nautical miles before the runway threshold. On landing, inspection of the aircraft revealed damage on the main landing gear; strike marks on the fuselage and engine intakes; and evidence of debris ingestion on the two left-side engines.
• 27 September 1977 – Japan Airlines Flight 715, a Douglas DC-8, crashed into a hill in bad weather while attempting to land on Runway 15. 34 people, including 8 of the 10 crew members and 26 of the 69 passengers, were killed when the aircraft broke on impact.
• 18 December 1983 – Malaysian Airline System Flight 684, an Airbus A300 from Singapore crashed 2 km short of the runway while approaching Runway 15 in bad weather. There were no fatalities, but the aircraft was written off. Ironically, the aircraft was operating its last scheduled flight for Malaysian Airline System, before being returned to its original operator, Scandinavian Airlines System.
• 19 February 1989 – Flying Tiger Line Flight 66, a Boeing 747-200F from Singapore crashed 12 kilometres from the airport while on approach to Runway 33. The pilots misinterpreted the controller's instructions to descend, causing the aircraft to fly below minimum altitude and crash into a hillside on the outskirts of Puchong. All four flight crew were killed.
• 18 March 2019 – At approximately 3.20am, an accident had happened on the runway of Sultan Abdul Aziz Shah Airport Subang involving a privately owned Bombardier Challenger 300 and an airport engineering vehicle. The vehicle was on the runway to escort contractors fixing the lighting of the runway when the airport staff driving it fell asleep while waiting for the contractors to finish their work. The contractors vacated the runway upon seeing the landing lights of the approaching aircraft while the airport staff in the vehicle had died from the incident a few days later. Two air traffic controllers were suspended due to the incident.
• 24 March 2021 - At 9.25am, an Airbus AS350 B3 helicopter crashed at the airport. There were five people on board, including one pilot and four passengers. All the victims were taken to the hospital for further treatment, two persons were reportedly injured and one suffered a broken leg and head injury. It left Sungai Lembing in Pahang at 8.30am and was on a private flight to Subang via Maran, Temerloh, Karak and the Batu Caves. A safety investigation will be conducted by Malaysia's Air Accident Investigation Bureau.
• 17 August 2023 - At 2.51pm, N28JV, a Beechcraft Premier I crashed at a highway two minutes drive from Sultan Abdul Aziz Shah Airport. There were 10 casualties involving eight people on the aircraft including YB Datuk Seri Johari Harun and two people on the highway. The aircraft departed Langkawi International Airport at 2.08pm heading to Sultan Abdul Aziz Shah Airport.

• AIROD is located north of the passenger terminal and occupies the land there.
• RMAF Subang Air Base is located on the western side of the runway, shared with the MMEA hangar.
• Various hangars storing corporate jets are located south of the Passenger Terminal.
• The cargo terminal, the base of Raya Air is actually located across the main road, featuring a taxiway crossing the road. Airbus Helicopters has an office at that same location.
• The Police Air Unit base for Peninsular Malaysia is located at the extreme south of the airfield, the latest addition after shifting there from Sungai Besi Air Base in 2018.

• Skypark Terminal Sultan Abdul Aziz Shah Airport at Malaysia Airports Holdings Berhad
• Current weather for WMSA at NOAA/NWS
• Accident history for SZB at Aviation Safety Network