Vietnam Overtakes Thailand in ASEAN Airline Capacity Shift

Vietnam has moved ahead of Thailand to become Southeast Asia’s second-largest commercial aviation market by seat capacity, underscoring how shifting airline strategies, tourism demand and infrastructure investment are redrawing the region’s connectivity map.

Vietnam Climbs to Number Two in Regional Capacity Rankings

Recent aviation data indicate that Vietnam has surpassed Thailand to become the second-largest aviation market in Southeast Asia by scheduled commercial seat capacity, behind only Indonesia. Figures compiled by data provider OAG for July and August 2026 show Vietnam offering around 7.4 million seats in a single month, compared with approximately 6.9 million for Thailand, reflecting a year-on-year increase of about 5.6 percent for Vietnam and a 3 percent decline for Thailand.([theinvestor.vn](https://theinvestor.vn/vietnam-beats-thailand-as-southeast-asias-second-largest-aviation-market-d19731.html?utm_source=openai))

OAG’s latest Southeast Asia market overview places Indonesia firmly in first place with just over 11 million monthly seats, but the more striking shift is Vietnam’s rise. Vietnam Airlines is identified as the single largest carrier in Southeast Asia by capacity in August 2026, operating an estimated 2.8 million seats that month, an 8.2 percent increase on the previous year.([oag.com](https://www.oag.com/south-east-asia-aviation-flight-data?utm_source=openai))

The reshuffle has implications beyond airline league tables. Seat capacity is a proxy for how carriers perceive future demand, and the reordering suggests that Vietnam is increasingly viewed as a primary gateway for both intra-ASEAN and wider Asia-Pacific traffic, rather than a secondary market to established hubs in Thailand and Singapore.

The shift also marks a break from pre-pandemic patterns. Industry snapshots from early 2024 still showed Thailand marginally ahead of Vietnam on capacity, with both markets trailing Indonesia.([asianaviation.com](https://asianaviation.com/wp-content/uploads/AAV_Jan-Feb_2024_Single-page.pdf?utm_source=openai)) The latest numbers indicate that recovery momentum and new growth are now tilted toward Vietnam.

Tourism Rebound and Domestic Demand Power Vietnam’s Growth

Vietnam’s aviation surge rests on a broad recovery in air travel. Official commercial guides report that the country’s airports handled around 109 million passengers in 2024, only slightly below 2023 levels, with a notable shift toward international travel. International passenger volumes rose by roughly 26 percent to about 41 million in 2024, while domestic traffic eased from its earlier pandemic-era highs.([trade.gov](https://www.trade.gov/knowledge-product/vietnam-aviation?utm_source=openai))

Within Southeast Asia, Vietnam has become one of the fastest-recovering markets in terms of total seat capacity compared with pre-Covid benchmarks. An aviation analysis by the Malaysian Aviation Commission highlighted that by mid-2024, Vietnam’s overall capacity recovery index was nearing full restoration, outpacing larger neighbors such as Thailand and Indonesia.([mavcom.my](https://www.mavcom.my/wp-content/uploads/2025/02/20240417-MAVCOM-ECONOMICS-WAYPOINT-SEPT-2024-v8.pdf?utm_source=openai))

Domestic routes still anchor this growth. The Hanoi–Ho Chi Minh City corridor continues to rank among the world’s busiest domestic sectors, carrying more than 10 million passengers annually and featuring prominently in OAG route rankings.([nationthailand.com](https://www.nationthailand.com/news/general/40044256?utm_source=openai)) High-frequency trunk operations on this and other short-haul routes allow Vietnamese carriers to deploy narrowbody fleets efficiently while building network density that feeds into international services.

Tourism dynamics are reinforcing this trajectory. ASEAN tourism outlook data for 2025 show that international air capacity into Vietnam has expanded rapidly, with international air traffic more than doubling in 2024 compared with 2023, while growth in markets such as Thailand and Malaysia has been more gradual.([asean.org](https://asean.org/wp-content/uploads/2026/02/Dummy_ASEAN-Tourism-Outlook-Report_Final-Draft_rev-26-Feb-2026_CRD.pdf?utm_source=openai)) As more long-haul and regional seats are added, Vietnam is drawing traffic that previously routed through Bangkok or other traditional hubs.

Infrastructure Expansion Strengthens Vietnam’s Hub Ambitions

Vietnam’s capacity gains are underpinned by substantial infrastructure investment. Ho Chi Minh City’s Tan Son Nhat International Airport has recently expanded with a new domestic terminal and remains one of Southeast Asia’s busiest gateways, handling passenger volumes that place it among the top four airports in the region.([en.wikipedia.org](https://en.wikipedia.org/wiki/Tan_Son_Nhat_International_Airport?utm_source=openai))

More transformative changes are expected from the Long Thanh International Airport project outside Ho Chi Minh City, envisaged with a long-term design capacity of up to 100 million passengers annually. Construction is progressing after several years of delay, and planning documents describe Long Thanh as a future regional hub that can relieve congestion at Tan Son Nhat and attract additional long-haul services.([trade.gov](https://www.trade.gov/country-commercial-guides/vietnam-aviation?utm_source=openai))

Beyond Ho Chi Minh City, Vietnam’s aviation master plan foresees a network of upgraded and new airports, including the expansion of Phu Quoc International Airport to handle up to 18 to 20 million passengers a year by around 2027.([trade.gov](https://www.trade.gov/country-commercial-guides/vietnam-aviation?utm_source=openai)) Government planning targets annual passenger-traffic growth in the range of 7.5 to 8.5 percent through 2030, alongside faster growth in air freight.([trade.gov](https://www.trade.gov/knowledge-product/vietnam-aviation?utm_source=openai))

These projects are paired with efforts to modernize air traffic management. Vietnam’s air navigation service provider is working toward regional leadership on safety and service quality, supporting more complex traffic flows within ASEAN’s crowded skies.([trade.gov](https://www.trade.gov/country-commercial-guides/vietnam-aviation?utm_source=openai)) Together, these elements create conditions for further increases in seat capacity that can sustain Vietnam’s new ranking.

Thailand Faces Slower Recovery and Capacity Rationalization

Thailand, long marketed as the region’s tourism powerhouse, remains a major aviation player but is currently losing ground on the capacity charts. OAG data for mid-2026 show Thai airline capacity slipping by about 3 percent year-on-year, even as other ASEAN markets grow.([theinvestor.vn](https://theinvestor.vn/vietnam-beats-thailand-as-southeast-asias-second-largest-aviation-market-d19731.html?utm_source=openai)) Analysts link the decline to a combination of higher fuel costs, slower-than-expected demand recovery on some long-haul routes, and ongoing restructuring among Thai carriers.

While Bangkok remains one of Asia’s principal gateways, several reports highlight that capacity growth is now more concentrated on selected trunk routes such as Bangkok–Hong Kong and Bangkok–Singapore, rather than across the broader network. Traffic on the Bangkok–Hong Kong route, for example, has surged compared with 2023 but still trails pre-pandemic levels, reflecting a cautious rebuild.([nationthailand.com](https://www.nationthailand.com/news/general/40044256?utm_source=openai))

Thai authorities and airport operators are continuing to invest in infrastructure, including major upgrades at Bangkok’s primary airports and the development of U-Tapao International Airport near Pattaya as a multi-modal hub.([youtube.com](https://www.youtube.com/watch?v=z7fqf_Y3IbQ&utm_source=openai)) However, the pace of new capacity additions has been tempered by financial constraints in the airline sector and a focus on improving yields rather than simply adding seats.

Regional tourism data also suggest that some visitor segments which once transited or originated in Thailand are diversifying toward Vietnam and other markets.([asean.org](https://asean.org/wp-content/uploads/2026/02/Dummy_ASEAN-Tourism-Outlook-Report_Final-Draft_rev-26-Feb-2026_CRD.pdf?utm_source=openai)) This does not signal a loss of relevance for Thailand as a destination, but it does underline the more competitive environment now shaping where airlines allocate aircraft across ASEAN.

What Vietnam’s Rise Means for ASEAN Connectivity

Vietnam’s ascent in seat-capacity rankings is prompting airlines to reconsider network strategies across Southeast Asia. Industry reviews of the 2025 and 2026 aviation seasons show carriers such as VietJet Air and Vietnam Airlines adding frequencies and new routes within ASEAN, to North Asia and to Australia, while other regional players trim or re-time services to manage costs.([tbmaviation.com](https://www.tbmaviation.com/insights/southeast-asia-aviation-in-review-2025?utm_source=openai))

According to ASEAN tourism outlook assessments, international air capacity into the bloc as a whole has recovered to roughly the mid-90 percent range of pre-pandemic levels, but the distribution of that capacity is shifting.([asean.org](https://asean.org/wp-content/uploads/2026/02/Dummy_ASEAN-Tourism-Outlook-Report_Final-Draft_rev-26-Feb-2026_CRD.pdf?utm_source=openai)) Vietnam’s rapid growth, alongside steady expansion in Indonesia and the Philippines, is helping to restore overall regional connectivity even as some legacy markets grow more slowly.

This rebalancing may, over time, alter passenger flows and hub dynamics. If Long Thanh International Airport delivers on its planned capacity and carriers maintain growth trajectories, Vietnam could increasingly function as a co-equal hub system with Bangkok for both intra-ASEAN and medium-haul Asian traffic, and as an alternative gateway for long-haul services from Europe and North Asia.

For travelers, the immediate impact is visible in expanding route maps and more direct options to and within Vietnam, often at competitive fares as carriers vie for market share. For ASEAN tourism and trade, Vietnam’s overtaking of Thailand in airline capacity underscores a broader shift in economic gravity and investment focus within the region’s aviation landscape.

Key sources: OAG Southeast Asia aviation capacity data; The Investor coverage of Vietnam surpassing Thailand; U.S. International Trade Administration Vietnam aviation sector overview; ASEAN Tourism Outlook 2025 report.