King Salman International Airport: The 185-Million Passenger Mega-Hub Anchoring Expo 2030 and Saudi Aviation’s Future

When 42 million visitors arrive in Riyadh for Expo 2030 beginning in October of that year, their first encounter with Saudi Arabia’s transformation will almost certainly be through its airports. The aviation infrastructure that greets them is undergoing the most ambitious expansion in the kingdom’s history—a multi-decade program to transform Riyadh from a regional aviation node into one of the world’s premier global transit hubs. At the center of this transformation is King Salman International Airport (KSIA), a mega-airport development that, when fully complete, will span 57 square kilometers, accommodate 185 million passengers per year, handle 3.5 million tons of cargo annually, and operate six runways. This is not merely an airport—it is an economic engine, an urban anchor, and a statement of intent about Saudi Arabia’s role in global connectivity.

The Vision: From King Khalid to King Salman

Riyadh’s current primary airport, King Khalid International Airport (KKIA), has served the Saudi capital since 1983. Located approximately 35 kilometers north of the city center, KKIA was designed for a different era—a time when Riyadh’s population was a fraction of its current size, Saudi Arabia’s tourism sector barely existed, and the concept of the kingdom as a global transit hub was not part of any strategic vision.

The limitations of KKIA have become increasingly apparent as Riyadh has grown and as Vision 2030 has dramatically expanded demand for air travel. The airport’s original design capacity has been progressively stretched through terminal upgrades, operational optimizations, and the addition of new facilities. In 2025, a major terminal reallocation project upgraded Terminals 3 and 4, increasing their combined capacity from 16 million passengers to 25 million passengers. This brought KKIA’s total capacity to approximately 42 million passengers in 2025, with further interim upgrades pushing toward 56 million passengers in 2026—a 33 percent increase that represents the maximum extractable from the existing infrastructure.

But 56 million passengers is far from sufficient for a city that expects to welcome 42 million Expo visitors over six months, that is positioning itself as a global tourism destination targeting 150 million annual visitors nationally by 2030, and that is building a metropolitan economy projected to rival the largest in the Middle East. The gap between KKIA’s ceiling and Riyadh’s ambitions is the reason King Salman International Airport exists.

KSIA represents a complete reimagining of Riyadh’s aviation infrastructure. The airport is being developed on a site north of the city, adjacent to the Expo 2030 venue—a deliberate co-location that creates synergies between the airport and the Expo’s post-event legacy development. The ultimate vision is an airport complex covering 57 square kilometers—roughly the size of a small city—with six runways and the capacity to handle 185 million passengers per year and 3.5 million tons of cargo annually.

These numbers place KSIA in the company of the world’s largest airports. For comparison, Dubai International Airport (DXB)—currently the world’s busiest international airport—handled approximately 92 million passengers in 2024. Istanbul Airport, designed as one of the world’s largest, has a planned ultimate capacity of 200 million passengers. Hartsfield-Jackson Atlanta, the world’s busiest airport by total passenger traffic, handled approximately 104 million passengers in 2024. KSIA’s 185-million passenger target would place it among the top three airports globally by capacity.

The Third Runway: Immediate Capacity Relief

The most immediately impactful element of the KSIA development program is the construction of the third runway, which has already commenced. The new runway will measure 4,200 meters in length—sufficient to accommodate the largest commercial aircraft in operation—and will feature multiple access taxiways designed for efficient aircraft movements.

The third runway addresses a near-term capacity constraint. The current airfield operates at approximately 65 aircraft movements per hour—a rate that is approaching the practical limit of a two-runway configuration during peak periods. The addition of the third runway will increase capacity to approximately 85 movements per hour, a 31 percent improvement that provides immediate headroom for growth and, critically, for the surge in traffic expected during the Expo 2030 period.

The construction contract for the third runway has been awarded to a joint venture of FCC Construccion SA (Spain) and Al-Mabani General Contractors Company (Saudi). The involvement of FCC—one of Europe’s leading infrastructure contractors, with experience on major airport projects globally—reflects the complexity of runway construction, which must meet International Civil Aviation Organization (ICAO) standards for surface quality, drainage, lighting, navigation aids, and safety areas.

The third runway’s design incorporates multiple access taxiways to minimize the time aircraft spend on the runway itself, maximizing throughput. The taxiway system will enable independent approaches and departures, allowing simultaneous operations on multiple runways during peak periods. The runway orientation and separation from existing runways must comply with ICAO and GACA (General Authority of Civil Aviation) standards for wake turbulence separation and instrument approach procedures.

The New Mega-Terminal: 40 Million Passengers

Alongside the runway expansion, KSIA’s development includes a new mega-terminal with an initial capacity of 40 million passengers per year. Construction is scheduled to begin in 2026, making it one of the largest terminal construction projects currently underway globally.

The mega-terminal design incorporates features that reflect both the latest trends in airport design and the specific requirements of the Saudi operating environment. Biometric-based passenger processing will be a central feature, using facial recognition and other biometric technologies to create a seamless journey from check-in through security, immigration, and boarding. This technology, increasingly common at leading airports globally, reduces processing times, eliminates the need for multiple document checks, and improves security by creating a verified identity chain throughout the passenger journey.

The terminal will include extensive retail and dining outlets—a revenue-generating component that has become essential to airport economics globally, but which takes on particular significance in Saudi Arabia where the entertainment and hospitality sectors have expanded dramatically since Vision 2030. Premium lounges will cater to the business and first-class travelers that Saudi Arabia is increasingly attracting as its economy diversifies and its role as a business hub grows.

A direct transport link to the Riyadh Metro will integrate the airport into the city’s public transit network—a critical connection that addresses one of the weaknesses of KKIA, which lacks a direct rail connection. The metro link will connect KSIA to the existing six-line network and, critically, to the planned Line 7 expansion that will run from Diriyah Gate in the north to Qiddiya in the southwest, passing through King Salman Park and the New Murabba downtown development. This integration means that Expo 2030 visitors arriving at KSIA will be able to reach the Expo site, city center, and major attractions without private vehicle transportation.

Bechtel’s Delivery Partnership

Bechtel Corporation’s role in the KSIA development extends beyond its PMC appointment for Expo 2030. The company was signed as the delivery partner for three new terminals at King Salman International Airport—a deal announced during President Trump’s 2025 visit to Saudi Arabia and representing one of the most significant airport construction contracts in the world.

Bechtel’s appointment as terminal delivery partner reflects the company’s extensive airport construction portfolio globally, which includes major projects on multiple continents, as well as its 80-year history of operations in Saudi Arabia. The company’s experience on the Riyadh Metro—where Bechtel served as a consortium partner for design, construction, and integration of the world’s largest metro project built in a single phase—demonstrates its ability to deliver large-scale transportation infrastructure in the Saudi context.

The delivery partnership for three terminals represents a multi-billion dollar commitment that will unfold over the coming decade. The terminals must be designed and constructed to accommodate growing passenger volumes while meeting international standards for safety, security, accessibility, and operational efficiency. The construction program must be coordinated with the ongoing runway construction, the development of airfield infrastructure, and the integration of air traffic management systems.

The scale of the construction effort required is enormous. A 40-million-passenger terminal is roughly equivalent in floor area to several large shopping malls combined, with the added complexity of baggage handling systems, security screening equipment, immigration processing facilities, airline operations areas, aircraft gates, ground transportation connections, and the mechanical and electrical systems needed to operate in one of the world’s most extreme climatic environments. The construction workforce alone will number in the tens of thousands during peak periods.

Interim Capacity: King Khalid Airport’s Transformation

While KSIA is under development, the existing King Khalid International Airport must handle Riyadh’s growing aviation demand through interim capacity expansions. The terminal reallocation program completed in 2025 represents the most significant of these interim measures.

The reallocation project reorganized airline operations across KKIA’s terminals to optimize capacity utilization. Terminals 3 and 4 were upgraded, with previous capacity of 16 million passengers increased to 25 million passengers. The total KKIA capacity reached approximately 42 million passengers in 2025, with further optimizations expected to push capacity toward 56 million passengers in 2026—a 33 percent increase over the 2025 figure.

This interim capacity expansion is critical for the period leading up to Expo 2030. The Expo is expected to generate an additional load of millions of international visitors arriving by air over its six-month duration, on top of the organic growth in Riyadh’s aviation traffic. The interim capacity at KKIA, combined with the progressive commissioning of KSIA facilities, must together provide sufficient airport capacity to handle this surge.

The challenge of managing airport capacity during the Expo period is compounded by the seasonal variation in Saudi Arabia’s aviation demand. The Hajj and Umrah pilgrimage seasons generate massive spikes in demand, particularly at Jeddah’s airports but also at Riyadh. Coordinating the Expo traffic with religious tourism traffic, business travel, and the growing leisure tourism sector requires sophisticated capacity management.

Aviation Ecosystem: Saudia and Riyadh Air

The airport infrastructure expansion is being developed in parallel with a dramatic expansion of Saudi Arabia’s airline capacity. The kingdom’s aviation strategy involves both the expansion of the national carrier, Saudia (formerly Saudi Arabian Airlines), and the creation of an entirely new carrier, Riyadh Air.

Saudia is ordering hundreds of new aircraft to expand its fleet and route network, with a focus on opening new direct routes from major international cities to Riyadh and other Saudi airports. The airline’s expansion program is designed to support the tourism targets of Vision 2030—reaching 150 million annual visitors nationally by 2030—by improving international connectivity and reducing the need for travelers to connect through third-country hubs.

Riyadh Air, the new national carrier headquartered in Riyadh, represents one of the most ambitious airline startups in aviation history. The airline is ordering hundreds of new aircraft—primarily next-generation widebody jets—and is positioning itself as a competitor to Emirates, Qatar Airways, and Etihad in the premium long-haul market. Riyadh Air’s route network will be built around KSIA as its hub, creating a direct economic linkage between the airport development and the airline’s growth.

The combined expansion of Saudia and Riyadh Air will introduce significant new seat capacity on routes connecting Riyadh to major markets in Europe, Asia, and North America. Nonstop flights from Chinese and European cities into Riyadh—eliminating the stopovers that currently characterize many of these routes—will be particularly significant for Expo 2030, making the kingdom more accessible to the global visitor base.

The aviation ecosystem expansion also includes the development of domestic air connectivity, with improved flight networks connecting Riyadh to secondary Saudi cities and tourist destinations. This domestic connectivity supports the broader tourism strategy of distributing visitors across the kingdom rather than concentrating them in Riyadh and Jeddah.

Cargo and Logistics

KSIA’s ultimate capacity of 3.5 million tons of cargo per year positions the airport as a major logistics hub for the Middle East and beyond. The cargo capacity is designed to support Saudi Arabia’s ambitions to develop Riyadh as a global logistics node—a strategy that leverages the kingdom’s geographic position at the crossroads of Europe, Asia, and Africa.

The cargo infrastructure at KSIA will include dedicated cargo terminals, automated handling systems, cold chain facilities for perishable goods, and e-commerce fulfillment capabilities that reflect the growing importance of online retail in the regional economy. The integration of the cargo facilities with road and rail connections will enable efficient distribution of goods across the Saudi market and to neighboring GCC countries.

For Expo 2030 specifically, the cargo infrastructure will be essential for supporting the logistics of the event itself—the movement of exhibition materials, construction supplies, pavilion contents, food and beverage products, and the myriad other goods required to operate a six-month, 42-million-visitor event. The proximity of KSIA to the Expo site reduces the transportation distances involved and enables more efficient logistics management.

Sustainability and Environmental Considerations

Airport development on the scale of KSIA inevitably raises environmental questions. The airport’s 57-square-kilometer footprint, the carbon emissions associated with the increased flight volumes it is designed to accommodate, and the energy requirements of operating a facility of this scale in a desert environment are significant environmental considerations.

The KSIA development program includes sustainability features that reflect international best practice in airport design, including energy-efficient terminal buildings, solar power generation capabilities, water recycling and conservation systems, and sustainable materials in construction. The kingdom’s broader commitment to sustainability—as articulated in the Saudi Green Initiative and the Expo 2030 sustainability themes—creates a framework within which the airport development is positioned as part of a green transition.

However, Saudi Arabia’s actual environmental performance, as measured by the Environmental Performance Index ranking of 108th globally, suggests a gap between sustainability ambitions and outcomes. The kingdom’s renewable energy deployment is one of the most significantly behind-schedule Vision 2030 targets, and the aviation sector globally is one of the most carbon-intensive industries. Reconciling the expansion of aviation capacity—which inherently increases carbon emissions—with sustainability commitments is a challenge that Saudi Arabia shares with every country pursuing aviation-led economic development.

The 2030 Timeline: Will It Be Ready?

The critical question for KSIA in the Expo 2030 context is which elements of the development program will be operational by October 2030. The full 185-million passenger, six-runway vision is a multi-decade program with a 2050 completion target. What matters for Expo 2030 is which components will be commissioned in time to support the event.

The third runway, with construction already underway, is expected to be operational well before 2030, providing the additional airfield capacity needed to handle Expo traffic volumes. The first phase of the new mega-terminal, with its 40-million passenger annual capacity, is on a timeline that targets readiness around the Expo period, though the exact commissioning date will depend on construction progress over the next four years.

The metro connection to KSIA, linked to the Line 7 expansion that is in preparation beginning in 2026, represents another critical piece of infrastructure that must be delivered in time for the Expo. The metro link transforms the accessibility equation for the airport and, by extension, for the Expo site located nearby.

The interim capacity expansions at KKIA provide a fallback—even if KSIA elements are delayed, KKIA’s 56-million passenger capacity provides a baseline level of airport infrastructure for the Expo period. However, the aspiration is for KSIA to be a showcase element of the Expo experience itself—a demonstration of Saudi Arabia’s infrastructure capabilities that visitors experience from the moment they land.

The risks to the timeline include the sheer scale of simultaneous construction activity in Riyadh, the competition for construction resources across the kingdom’s multiple mega-projects, and the potential for supply chain disruptions. The governance structure—with the RCRC providing oversight, PIF providing funding, and international contractors including Bechtel providing delivery capabilities—is designed to manage these risks, but the complexity of the program leaves limited margin for unexpected delays.

The Competitive Landscape

KSIA’s development takes place in a competitive context where multiple Middle Eastern airports are expanding simultaneously. Dubai is investing in Al Maktoum International Airport (DWC), designed as an eventual replacement for the existing DXB with capacity exceeding 200 million passengers. Istanbul Airport, opened in 2018, continues to expand toward its 200-million passenger ultimate capacity. Abu Dhabi’s Midfield Terminal, Doha’s Hamad International Airport expansion, and various other regional projects all compete for airlines, passengers, and cargo traffic.

Saudi Arabia’s competitive advantages include its geographic position (closer to major Asian and African markets than European hub airports), its large domestic market (a population of approximately 36 million plus a significant expatriate population), the religious tourism demand generated by Hajj and Umrah, and the economic stimulus provided by Expo 2030, the 2034 World Cup, and ongoing Vision 2030 investments.

The creation of Riyadh Air as a new carrier specifically designed to use KSIA as its hub represents a strategic integration of airline and airport development that mirrors the Dubai-Emirates and Qatar-Qatar Airways models. The success of KSIA as a global aviation hub will depend in significant part on the success of Riyadh Air in establishing a competitive network of international routes.

For Expo 2030, the airport’s role extends beyond logistics. It will be the gateway through which the world first encounters Saudi Arabia’s transformation. The quality of the airport experience—the efficiency of processing, the design of the spaces, the level of service, and the ease of onward transport to the Expo site—will shape visitors’ first impressions and set the tone for their entire Expo experience. In this sense, KSIA is not just infrastructure—it is the opening chapter of the Expo 2030 narrative.