Thai Airways Top 10 Busiest International Routes in 2025

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BANGKOK- Thai Airways (TG), one of Southeast Asia’s most iconic full-service carriers. The airline has long maintained a robust international network. Thai Airways is the airline that connects Bangkok to the world.

A founding member of Star Alliance, Thai Airways blends premium service with a diverse fleet to serve a range of global destinations. In 2025, the airline operates flights to 56 international destinations in 30 countries, alongside 9 domestic routes within Thailand.

While the airline is renowned for its royal Thai hospitality and long-haul comfort, its operational strength lies in the frequency and seat volume it manages on some of Asia’s busiest and most strategic international routes. These routes represent more than just flights. They are high-traffic economic corridors linking business hubs, cultural powerhouses, and major tourism gateways.

Top 10 Busiest International Routes

Below, we break down the top 10 international routes of Thai Airways based on weekly one-way seat capacity, exploring not just the numbers but the strategic reasoning behind their success.

1. Bangkok – Singapore

At the top of Thai Airways’ international network is the Bangkok–Singapore route, operated with an impressive frequency of five daily flights. This corridor is a key business and leisure route in Southeast Asia, linking two major financial and aviation hubs.

Thai deploys a varied mix of widebodies and narrowbodies on this route: three daily flights with the Airbus A350-900 (321 seats), one with the Boeing 787-8 Dreamliner (264 seats), and one with the Airbus A320-200 (168 seats).

Over a week, this equates to 9,765 one-way seats—making it not only Thai’s busiest international route but also one of the most competitive in the region, considering the presence of Singapore Airlines, Scoot, and low-cost competitors like AirAsia and Jetstar Asia.

The route serves a balanced mix of business travelers, connecting passengers, and tourists.

2. Tokyo Narita – Bangkok

Japan remains a key international market for Thai Airways, and the Bangkok–Tokyo connection has long been one of its most prestigious routes. With three daily flights between the two cities, Thai operates two A350-900s and one Boeing 777-300ER (348 seats).

This blend of modern widebodies caters to both business and leisure segments and allows for seamless connection to Japanese cities and Thai domestic destinations.

These three flights per day translate to a weekly total of 6,930 one-way seats. The route not only serves the flow of Japanese tourists heading to Thailand’s beaches and cultural landmarks but also carries Thai students, business travelers, and cargo shipments into the Japanese capital.

3. Bangkok – Hong Kong

Another high-density regional route, Bangkok – Hong Kong, has four daily Thai Airways flights. The aircraft used are a mix of Boeing widebodies and narrowbodies: one Boeing 777-200 (292 seats), one Boeing 777-300ER, and two daily A320-200 flights. This route is critical for both business and family travel, given Hong Kong’s role as a financial center and its large Thai expatriate community.

The weekly seat total stands at 6,832 one-way seats, bolstered by strong demand from tourism and trade. Hong Kong is also a vital transit point for passengers heading further into mainland China and beyond.

4. New Delhi – Bangkok

India is one of Thai Airways’ most strategically significant markets, and the Bangkok–New Delhi route stands as a prime example.

With 22 weekly flights, the airline deploys an impressive mix of widebody aircraft, including the A330-300 (264 seats), Boeing 777-300ER, and Boeing 777-200, along with a weekly service on the smaller A320-200.

This combination brings the total to 6,517 one-way seats per week, highlighting the deep ties between Thailand and India across business, tourism, and medical travel. New Delhi acts as a northern Indian gateway for Thai Airways, connecting further to Bangkok and onward to East Asia, Australia, and Europe.

5. Bangkok – Taipei

Taipei is another essential East Asian route in Thai’s network, with three daily services. The fleet mix on this route includes a Boeing 777-300ER, a Boeing 787-8, and an A320-200. These aircraft ensure a strong blend of capacity and efficiency, with a weekly one-way seat count of 5,460.

Taipei serves as a hub for tech, trade, and culture. This route seems to be popular among business professionals and also tourists. It also helps funnel Taiwanese travelers into Thailand’s booming hospitality sector.

6. Bangkok – London Heathrow and Frankfurt

In a tie, two of Thai Airways’ most prestigious European routes—London Heathrow and Frankfurt—both offer the same seat volume. Each city receives two daily flights on Boeing 777-300ERs, with 348 seats per aircraft. This equals 4,872 weekly one-way seats on each route.

Both routes have long been vital for the airline’s European outreach. London remains a key business and tourism center, while Frankfurt, being a major Star Alliance hub, allows for seamless connectivity into the rest of Europe.

7. Seoul – Bangkok

South Korea continues to be one of Thailand’s fastest-growing inbound tourism markets, and Thai Airways capitalizes on this with 15 weekly flights between Seoul and Bangkok—all operated with the spacious and modern Airbus A350-900. With 321 seats per flight, the weekly one-way capacity stands at 4,815.

Seoul’s increasing importance also stems from cultural ties and rising bilateral trade. This route supports not just tourists but also Korean businesses with Thai connections.

8. Bangkok – Sydney and Melbourne

In another tied ranking, Thai Airways’ Australia operations to Sydney and Melbourne have identical weekly seat capacity. Both cities are served daily with the A350-900, and together they account for 4,494 seats each week. These routes form a crucial part of the airline’s long-haul footprint.

Australia and Thailand share a strong tourism exchange, with Australians heading to Thai beaches and Thai students and expatriates making regular visits home. The A350-900, known for its fuel efficiency and comfort, is well suited to this eight- to nine-hour sector.

9. Kuala Lumpur – Bangkok

A shorter regional sector, the Bangkok–Kuala Lumpur route is served twice daily, both operated using the Boeing 787-9. This Dreamliner variant, seating between 292 and 298 passengers depending on configuration, offers a total of 4,130 weekly one-way seats.

This corridor is especially popular for regional business and leisure passengers connecting to broader destinations in Southeast Asia. The high-capacity Dreamliner helps ensure a premium travel experience even on this shorter route.

10. Bangkok – Jakarta

Rounding out the top 10 is the Bangkok–Jakarta route, with two daily flights—one on a 787-8 and another on an A350-900. With a total of 4,095 weekly one-way seats, this route underscores the strong ASEAN connectivity Thai Airways maintains.

Indonesia is Southeast Asia’s most populous country and a growing market for outbound and inbound travel. Thai Airways also serves Denpasar in Indonesia.

Bottom Line

In 2025, Thai Airways demonstrates a smart balance of frequency, aircraft efficiency, and strategic deployment across Asia-Pacific and Europe.

The airline delivers high seat volume in its top international routes. This also reflects the airline’s focus on premium business travel, strong tourism corridors, and Star Alliance connectivity.

As the carrier continues its recovery and growth, it is well-positioned to expand capacity in key markets while maintaining its signature full-service appeal. Thai Airways will continue to serve as Thailand’s global ambassador in the skies, combining tradition, efficiency, and global reach.

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