Southeast Asia’s (SEA) aviation sector is preparing for sustained growth in passenger traffic, airport capacity and airline fleet size. According to forecasts by Boeing, passenger traffic in SEA is expected to grow by around 7 per cent annually and regional airlines will need around 4,885 new aircraft through 2044 to meet increasing demand. The new phase of airport development, therefore, is extending beyond visible, passenger-facing infrastructure such as terminals to the less visible systems that allow airports to operate safely, efficiently and at higher capacity. These include air traffic control (ATC) and navigation, airfield infrastructure, cargo, maintenance, repair and overhaul (MRO), and ground support and fuel systems, among others.

ATC and navigation infrastructure

Air traffic management is among the least visible components of airport infrastructure. However, it determines how efficiently aircraft can use available runways and airspace capacity. As airports add runways and terminals, air navigation service providers (ANSPs) also need to expand surveillance, communication, navigation and air traffic management capabilities.

Singapore is taking a long-term approach to this requirement. In July 2026, the Civil Aviation Authority of Singapore (CAAS) announced a S$4 billion, 15-year programme to upgrade more than 30 air navigation services systems. The programme includes the NexGen Air Traffic Management System, an Integrated Digital Tower System, Info-Centric Air Traffic Management System and Open Platform for Air Navigation Services. CAAS will also upgrade the Changi Control Tower and Singapore Air Traffic Control Centre. The Integrated Digital Tower System will use cameras and sensors to provide controllers with a real-time digital view of the airport, while the number of aerodrome controller workstations is planned to be increased from 20 to 54. The Info-Centric Air Traffic Management System will use predictive analytics and digital information exchange to support traffic management.

Similar upgrades are being undertaken across other SEA airports to strengthen their existing air traffic management capabilities. In September 2026, the Civil Aviation Authority of Malaysia commenced a three-month live operational trial of digital automatic terminal information service (ATIS) at Kota Kinabalu, Tawau, Sibu, Sandakan, Kuching and Bintulu airports. Additionally, the country has also implemented a new ATIS system at selected air traffic service units, with the upgraded system providing meteorological information in accordance with International Civil Aviation Organisation (ICAO) requirements.

Laos is upgrading Wattay International Airport in Vientiane with Japanese grant assistance valued at more than JPY 2.8 billion ($17.9 million). The project includes upgrades to the ATC system and key airport infrastructure, including the runway and taxiways.

Indonesia is pursuing a different but complementary approach. AirNav Indonesia signed an agreement with Indonesia’s Geospatial Information Agency in July 2026 to strengthen satellite-based aviation navigation through improved use of geospatial information. Further, AirNav Indonesia and Airservices Australia signed a memorandum of understanding (MoU) for air navigation modernisation.

Airfield infrastructure

As airports expand their capacity, upgrades to aprons, taxiways and runways are becoming an important part of airport infrastructure development. Penang International Airport in Malaysia is currently undergoing expansion of the main apron, rehabilitation of the existing apron taxiway, introduction of a new helicopter apron and introduction of a new aircraft stand Taxilane L, new helicopter stand Taxilane M and new aircraft stand Taxilane N. Work began on July 19, 2026 and is scheduled to run until July 1, 2027. Changi airport in Singapore is also planning for Runway 1 pavement resurfacing, elevation top-up and airfield lighting renewal, along with associated works.

At the same time, airports need to maintain safe and efficient aircraft movement while such infrastructure works are being carried out. Changi’s East Cargo apron, for example, has undergone works requiring temporary changes to taxiing and aircraft pushback procedures. The airport has used measures including minimum-thrust procedures, temporary markings and towing assistance to maintain safe operations during construction. Taxilane N4 behind Stand 604 was temporarily closed from July 9, 2026 to October 1, 2026, while the adjacent Stand 603 was downgraded to Code C.

Air cargo infrastructure

Air cargo is another area where infrastructure development is increasingly moving beyond simply adding or expanding warehouse space. Airports need automated handling, digital truck slot management, temperature-controlled facilities, faster customs processes and better visibility of shipments.

At Changi airport in Singapore, recent measures introduced such as a dedicated facility for standardised, ready-to-ship containers and pallets, is expected to reduce processing time by 20 per cent. A truck dock slot booking system has reduced waiting times for export cargo truck drivers by up to 25 per cent. Further, Singapore Airport Terminal Services is investing S$100 million to upgrade its cargo facilities at the airport. The investment is expected to increase asset and resource utilisation by up to 20 per cent and raise cargo-handling capacity from 2.3 million tonnes per annum (mtpa) to 3 mtpa.

Malaysia is also using cargo infrastructure to target specialised supply chains. In September 2026, Malaysia Airports, the China Henan Aviation Group and Tropika Makmur Manufacturing signed an MoU to explore a KUL-CGO Smart Durian Fast Track for faster movement of durians and other time-sensitive agricultural products between Kuala Lumpur International Airport and Zhengzhou Xinzheng International Airport.

MRO

The growth of airline fleet across SEA is also creating demand for infrastructure that keeps aircraft in service. MRO facilities require far more than hangars. Modern maintenance ecosystems include workshops, aircraft components, engines, tooling, spare parts storage, testing facilities, specialist technicians and supporting logistics.

Malaysia is developing this ecosystem at Subang airport. Malaysia Airports and Mitsui Fudosan broke ground in July 2026 on an RM 80 million MRO logistics complex at the Subang Aerotech Park. The facility is being developed on a 1.79 hectare site and will provide about 254,420 square feet of gross floor area for aviation, aerospace and logistics operators.

The Philippines is pursuing a larger expansion at the Clark International Airport. Lufthansa Technik Philippines broke ground for an MRO facility in August 2026 on a 157,000 square metre site. Operations are scheduled to begin in 2028, with the facility including a paint shop and non-destructive testing workshops. In June 2026, Sun Group, HAECO, Japan Airlines and Toyota Tsusho agreed to develop a $360 million MRO complex at Van Don International Airport in Quang Ninh, Vietnam.

Further, Indonesia, is developing plans to turn Kertajati International Airport in West Java into an MRO hub, with operations targeted to commence in 2026.

Ground support infrastructure

Ground support infrastructure is another critical layer. Every aircraft turnaround depends on a network of equipment and services that operate largely out of sight. Baggage tractors, pushback vehicles, aircraft tugs and ground power units, etc., are going through an electrification and automation shift across the region.

At Suvarnabhumi airport in Thailand, the Thai cabinet approved Airports of Thailand Ground Aviation Services’ participation as a third operator for ground services and equipment and for cargo warehouse services in September 2026. This highlights the importance of expanding capacity alongside passenger and aircraft growth. Core services include aircraft support equipment, handling and moving baggage, cargo and mail, as well as supporting efficient flight operations. Additional services cover general ground management, aviation operations, flight procedures and crew-related services.

Competition and additional capacity in ground services can become increasingly important as airports attempt to reduce turnaround times and accommodate more aircraft movements. Alongside capacity, airports are also focusing on reducing the environmental impact of ground operations through the adoption of cleaner technologies. As of May 2026, 30 per cent of Changi’s airside fleet is already electric. It targets for all airside vehicles to operate on cleaner energy by 2040 through fleet electrification, the use of renewable diesel and the adoption of hydrogen-powered vehicles.

Fuel infrastructure

Another critical layer that supplies airports with fuel remains entirely outside the passenger experience. Phase I of Long Thanh International Airport in Vietnam features a dedicated aviation fuel system with six floating tanks, containing aircraft fuel with a capacity of 6,000 cubic metres each and an auxiliary system to supply fuel to aircraft, while a separate project is laying two parallel pipelines to link the source depot to the airport. These facilities are being completed to support commercial operations from late 2026.

The way forward

The next phase of airport development will be defined by capacity that passengers do not necessarily see. Investment will need to focus on digital air traffic management, automation, cargo logistics, MRO ecosystems, electrified ground operations, resilient fuel systems and efficient airside operations alongside terminals and runways. The region’s airports are already moving in this direction.

For airport operators, the objective will increasingly be to build an interconnected infrastructure ecosystem in which aircraft, passengers, cargo, data, energy and people move efficiently across the airport. The terminal may remain the most visible part of an airport, but the infrastructure behind it will increasingly determine how much capacity the airport can actually deliver.