When it comes to land area, Southeast Asia offers a surprisingly impressive lineup. The largest airport in the region is bigger than some city-states. From Malaysia’s sprawling mega-hub to Vietnam’s still-under-construction giant, here are the region’s largest airports by land size:
1. Kuala Lumpur International Airport (KLIA) — ±100 km²
The largest airport in Southeast Asia and one of the biggest in the world. Despite its name, it is not located in Kuala Lumpur proper, but in the Sepang District of Selangor, about 45 km south of the city center.
The site is so vast that it accommodates two main terminals, a Formula 1 circuit, an international-standard golf course, and extensive green areas that ensure room for expansion for decades to come.
2. Long Thanh International Airport — 50 km²
Located in Dong Nai Province, around 40 km east of Ho Chi Minh City, this is the most expensive infrastructure project in Vietnam’s history, with an investment of US$16 billion. It is designed to relieve congestion at the already overcapacity Tan Son Nhat Airport.
Once fully operational by the end of 2026, Long Thanh will surpass Suvarnabhumi as the second-largest airport in the region. Its ultimate capacity is planned to exceed 100 million passengers and 5 million tons of cargo annually.
3. Suvarnabhumi Airport — ±35 km²
Opened in 2006 as Thailand’s primary international gateway, replacing the overburdened Don Mueang Airport. Located in Samut Prakan, it marked a new chapter for Thai aviation with modern facilities and significantly improved connectivity for both long-haul and regional routes.
For now, it still ranks second until Long Thanh becomes fully operational.
4. Techo International Airport — 26 km²
A new entrant that immediately ranks among the top four upon opening. Located about 19–20 km from central Phnom Penh, the airport spans across two provinces: Kandal and Takeo.
Officially launched in 2025, Techo represents Cambodia’s ambition to attract more international tourists and elevate its position in the regional tourism landscape.
5. Clark International Airport — 23.67 km²
Located about 80 km north of Manila in Pampanga, Clark has grown into a crucial alternative to the often-congested Ninoy Aquino International Airport. The airport handled 2.75 million passengers in 2025, up 14% from the previous year.
It also serves as a hub for Philippine Airlines, Cebu Pacific, AirAsia, and Sunlight Air.
6. Soekarno–Hatta International Airport — ±18 km²
Located in Tangerang, Banten, Soekarno–Hatta is the primary gateway to Greater Jakarta and the busiest airport in Indonesia. Its two main terminals divide operations: Terminal 1 serves Garuda Indonesia and Merpati Nusantara Airlines, while Terminal 2 handles other carriers.
With two runways and consistently heavy traffic, the airport continues to undergo upgrades to keep pace with steady passenger growth each year.
7. Hang Nadim Airport (Batam) — 17.6 km²
Among all airports on this list, Hang Nadim holds a distinctive claim: a 4,025-meter runway, the longest in Indonesia and the second longest in Southeast Asia. Located in Batam, just a short ferry ride from Singapore, the airport serves a city known for its beaches, seafood, and duty-free shopping.
Its proximity to Singapore makes Hang Nadim a strategically positioned gateway with a growing regional role.
8. Kualanamu International Airport — 13.6 km²
Inaugurated in 2013, Kualanamu quickly became Indonesia’s third-largest airport and the main hub for North Sumatra, located about 32 km from central Medan.
One of its unique features: it was the first airport in Indonesia designed without the need for baggage porters, thanks to a fully integrated automated baggage handling system.
9. Singapore Changi Airport — ±25 km²
In terms of land area, Changi is not the largest in the region, even smaller than two Indonesian airports on this list.
But in terms of reputation, it remains unmatched, having been named the world’s best airport by Skytrax for the 14th time in 2026, after serving 70 million passengers in 2025. Changi proves that efficient land use can matter far more than sheer size.
Groundbreaking for Terminal 5 took place in May 2025. Built on a 1,080-hectare site, the new terminal will nearly double Changi’s footprint when completed in the mid-2030s, adding capacity for another 50 million passengers annually.
10. Ngurah Rai International Airport — ±9 km²
Despite being the smallest on this list, Ngurah Rai carries one of the heaviest symbolic roles: it is Bali’s sole international air gateway and a key barometer of Indonesia’s tourism health.
Every surge and dip in tourist arrivals is immediately reflected in its terminals. It is no surprise that discussions about building a second airport in Bali continue to gain traction.
