Kuala Lumpur International Airport in Malaysia covers over 100 square kilometers in Sepang, placing it the biggest in Southeast Asia, as compiled by VnExpress International.
Despite its name, it is not located within Kuala Lumpur, but in Selangor's Sepang District, about 45 km (28 miles) south of the city.
Designed for long-term growth, the airport includes multiple runways and expansive support infrastructure, enabling it to scale operations efficiently in line with rising passenger and cargo demand.
Photo by Reuters
Covering roughly 35 square kilometers, Suvarnabhumi Airport in Thailand ranked second.
Suvarnabhumi Airport officially opened in 2006 as Thailand's primary international gateway, built to accommodate rapidly rising passenger traffic.
The airport took over most international operations from Don Mueang International Airport, which had become overcrowded, allowing for more efficient handling of long-haul and regional flights.
Its opening marked a new era for Thailand's aviation industry, providing state-of-the-art facilities and increased capacity.
Covering an area of 50 square kilometers, Vietnam's Long Thanh International Airport is set to replace Suvarnabhumi Airport as Southeast Asia's second-largest airport when it begins commercial operations in the fourth quarter of 2026.
Photo by Reuters
Techo International Airport in Cambodia covers a total area of approximately 26 square kilometers, making it the third biggest airport in the region.
Located in the Kandal and Takeo provinces, about 19-20 kilometers from downtown Phnom Penh, this airport opened in 2025 as Cambodia aims to draw more international tourists and transform the country's regional tourism image.
Photo by Reuters
About 80 kilometers north of Manila City in the Philippines, Clark International Airport covers an area of 23.67 square kilometers, the fourth biggest in the region.
It is accessible via expressways and hub for Philippine Airlines, Cebu Pacific Philippines, AirAsia and Sunlight Air.
The airport handled 2.75 million passengers in 2025, a 14% jump from 2.40 million the year before.
Photo courtesy of the airport
Covering approximately 18 square kilometers, Soekarno-Hatta International Airport, which serves the Jakarta metropolitan area, is the fifth largest airport in Southeast Asia by land area.
The airport has two runways and 2 main terminals, with Terminal 1 serving Garuda Indonesia and Merpati Nusantara Airlines, and Terminal 2 serving other airlines.
Photo by Reuters
Covering an area of 17.6 square kilometers, Batam Airport, officially known as Hang Nadim Airport serving the city of Batam, ranks sixth.
This airport has the longest runway in Indonesia and the second longest in Southeast Asia that spans 4,025 meters.
Located a short ferry ride away from Singapore, Batam is a popular destination known for its beaches, seafood and duty-free shopping, as well as its role as a growing industrial and tourism hub.
Photo courtesy of the airport
Spanning an area of 13.6 square kilometers, Kualanamu International Airport in Indonesia's North Sumatra is a leading international airport located approximately 32 kilometers east of the center of Medan City.
Since its inauguration in 2013, it has established itself as the third largest airport in Indonesia.
The airport has an automatic baggage handling system, thus becoming the first airport in the country which does not need baggage porters.
Photo courtesy of the airport
Singapore Changi Airport occupies a total land area of approximately 13 square kilometers, making it the eighth largest in Southeast Asia.
Built heavily on reclaimed land, it includes four main passenger terminals, Jewel Changi, and three runways.
Construction of Changi's Terminal 5 (T5) commenced in May 2025, following a pandemic-induced pause.
The new terminal, which spans 10.8 square kilometers, would nearly double the size of Changi Airport's current space.
