SOUTHEAST ASIA AVIATION MARKET DATA

How much airline capacity is there in Southeast Asia? Find out with new data each month.

In December 2025 the top stats from the Southeast Asian aviation market are:

• Busiest Airport: Singapore Changi (SIN)
• Biggest Airline: AirAsia
• Country with Most Airline Capacity: Indonesia
• Top Destination Region: Asia Pacific
• And discover more...

Find below flight data and analysis focused on the Southeast Asia aviation market, with data powered by OAG's Schedules Analyser. The data is updated monthly. Seats are calculated as departing seats (one-way).

How Much Airline Capacity is There in SouthEast Asia This Month?

• Overall airline capacity in Southeast Asia is up 5% year-on-year reaching 55 million seats in December 2025.
• International airline capacity increased by 6.4%, whilst domestic airline capacity has increased by 3%.
• International capacity represents 57% share of the market, and domestic capacity represents the remaining 43% market share.
  

Which sOUTHeAST aSIAN Country Has The Most Airline Capacity (Domestic + International)?

• Indonesia remains the largest Southeast Asian country market in December 2025 with 10.7m seats, despite reducing airline capacity again this month by 3.6% compared to the same month last year.
• Thailand is the next largest market in Southeast Asia, with 8.4m seats, a 2.6% increase in capacity vs last year.
• Malaysia and Viet Nam again record the strongest growth in seat capacity this month, adding 834k and 666k seats respectively compared with last year.
• Capacity in Myanmar declined by 34.7% vs December 2024, a reduction of 115k seats.
  
  
• For more insight into airline capacity, get in touch regarding our flight seat data here.

Which sOUTHeAST aSIAN Country Has The Most Domestic Airline Capacity?

• Indonesia is the largest domestic market in Southeast Asia in December 2025 with 8.5m seats, despite a 5.6% reduction in capacity (507k fewer seats).
• Malaysia recorded the largest increase in domestic seat capacity by volume, adding 482k seats year-on-year, followed by the Philippines with 327k and Viet Nam with 316k additional seats vs December 2024.
• Domestic capacity in Myanmar has reduced by 65.1%, with 130k fewer seats.

Which is the Busiest Airport in SouthEast Asia?

• Singapore Changi remains the largest airport in Southeast Asia, with 3.75m seats. This represents a 0.3% reduction in capacity compared to last year. Kuala Lumpur is the second busiest airport with seat capacity of 3.69m, an increase of 16.1% vs last year.
• Within the Top 10 airports in Southeast Asia, Hanoi and Kuala Lumpur grew at the fastest rate, up 16.9% and 16.1% respectively vs last year.
• Denpasar-Bali recorded the largest decline in the Top 10, with seat capacity down 2.6% compared to December 2024.
  

Where do International Flights From SOUTHEAST Asia Go?

• Southeast Asia’s largest international market is the rest of Asia Pacific, with 18.9 million seats, up 6.9% year-on-year (an additional 1.2 million seats).
• International capacity within Southeast Asia, the next largest market with 7.3 million seats, grew by 3.9% (an additional 275,000 seats) compared to December 2024.
• Capacity to North America and Europe continues at the fastest rates this month, increasing by 13.8% and 13.2% respectively.
  
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