Top 10 Busiest International Routes in Asia by Flight Frequency.

Asia is home to some of the world’s most dynamic and rapidly expanding aviation markets, with air travel continuing to grow at an exceptional rate. The region boasts a number of bustling international routes that cater to both business and leisure travelers, driven by strong economic ties, tourism, and cultural exchanges. Among these routes, some stand out not only for the volume of traffic but also for the frequency of flights and the capacity offered by airlines. Below is a look at the top 10 busiest international routes in Asia, based on monthly flight frequency, seating capacity, and the airlines serving these vital connections.

1. Kuala Lumpur (KUL) – Singapore Changi (SIN)
   • Monthly Flights: 2,296
   • Total Monthly Seats Offered: 440,350
   • Total ASMs (Available Seat Miles): 81,024,400
   • Major Carriers: Malaysia Airlines, AirAsia, Singapore Airlines, Scoot
   The route between Kuala Lumpur and Singapore is the busiest international air link in Asia, with more than 2,200 flights every month. Serving as a vital corridor for both business and tourism, the route has high frequencies due to the close proximity of the two cities. Passengers are offered a plethora of flight options, and multiple carriers dominate this high-demand route, providing ample seating capacity.
2. Hong Kong (HKG) – Taipei (TPE)
   • Monthly Flights: 2,222
   • Total Monthly Seats Offered: 568,082
   • Total ASMs: 284,609,082
   • Major Carriers: Cathay Pacific, China Airlines, EVA Air
   The Hong Kong-Taipei route is another busy international air link, with flights operating in high frequencies, totaling over 2,200 monthly services. The close proximity and strong business and cultural exchanges between Hong Kong and Taiwan contribute to the route’s popularity. The major carriers on this route ensure that seats are readily available for passengers throughout the month.
3. Seoul Incheon (ICN) – Tokyo Narita (NRT)
   • Monthly Flights: 1,956
   • Total Monthly Seats Offered: 440,452
   • Total ASMs: 345,314,368
   • Major Carriers: Korean Air, Asiana Airlines, All Nippon Airways (ANA), Japan Airlines
   Connecting two of Asia’s largest economies, Seoul and Tokyo are linked by one of the region’s busiest air routes. With nearly 2,000 flights every month, the route is a vital link for both business travelers and tourists. The major carriers operating on this route ensure that it remains one of the most well-served international connections in Asia.
4. Osaka Kansai (KIX) – Seoul Incheon (ICN)
   • Monthly Flights: 1,880
   • Total Monthly Seats Offered: 423,640
   • Total ASMs: 227,071,040
   • Major Carriers: Korean Air, Jeju Air, Peach Aviation
   Another critical route in the East Asia region is the Osaka-Seoul connection, which sees nearly 1,900 flights per month. The strong cultural and economic ties between Japan and South Korea are reflected in the frequency of this route, with numerous low-cost and full-service airlines operating the service.
5. Jakarta (CGK) – Kuala Lumpur (KUL)
   • Monthly Flights: 1,691
   • Total Monthly Seats Offered: 298,784
   • Total ASMs: 208,850,016
   • Major Carriers: Malaysia Airlines, AirAsia, Batik Air
   The Jakarta-Kuala Lumpur route is an essential connection between two of Southeast Asia’s largest cities. With more than 1,600 flights every month, this busy route serves both business and leisure travelers, offering significant seating capacity to accommodate demand. AirAsia and Malaysia Airlines are the primary carriers operating this route, providing competitive prices and frequent services.
6. Singapore Changi (SIN) – Jakarta (CGK)
   • Monthly Flights: 1,613
   • Total Monthly Seats Offered: 326,440
   • Total ASMs: 178,236,240
   • Major Carriers: Singapore Airlines, Garuda Indonesia, Scoot
   Singapore and Jakarta are major business hubs in Southeast Asia, and the air link between them is well-frequented, with over 1,600 flights per month. This route is critical for trade, tourism, and cultural exchange. Singapore Airlines and Garuda Indonesia are the primary airlines serving this high-demand route.
7. Fukuoka (FUK) – Seoul Incheon (ICN)
   • Monthly Flights: 1,426
   • Total Monthly Seats Offered: 313,768
   • Total ASMs: 109,818,800
   • Major Carriers: Korean Air, T’way Air, Jeju Air
   The route between Fukuoka and Seoul is one of the busiest links between Japan and South Korea. With more than 1,400 flights per month, this route is well-served by both full-service and low-cost carriers. The flight frequencies are driven by strong demand for both business and leisure travel between these two cities.
8. Hong Kong (HKG) – Bangkok (BKK)
   • Monthly Flights: 1,275
   • Total Monthly Seats Offered: 313,046
   • Total ASMs: 328,072,208
   • Major Carriers: Cathay Pacific, Thai Airways, Hong Kong Airlines
   The Hong Kong-Bangkok route is a vital connection in the region, popular for both tourism and business. With more than 1,200 flights each month, this route is well-served by multiple carriers, offering competitive pricing and a range of flight times. Bangkok’s appeal as a tourism hub, combined with strong trade between Hong Kong and Thailand, makes this route one of the busiest in Asia.
9. Bangkok (BKK) – Singapore Changi (SIN)
   • Monthly Flights: 1,212
   • Total Monthly Seats Offered: 335,528
   • Total ASMs: 294,258,056
   • Major Carriers: Singapore Airlines, Thai Airways, Scoot
   The Bangkok-Singapore route is another high-demand connection in Southeast Asia, with over 1,200 flights operating every month. Both cities are key business and tourism hubs, which drives the frequent services offered by carriers like Thai Airways and Singapore Airlines.
10. Denpasar Bali (DPS) – Singapore Changi (SIN)

• Monthly Flights: 1,098
• Total Monthly Seats Offered: 276,762
• Total ASMs: 287,002,194
• Major Carriers: Singapore Airlines, Scoot, Garuda Indonesia

Bali, one of the most popular holiday destinations in Asia, is well-connected to Singapore, with nearly 1,100 flights per month. The route is popular with tourists, especially those traveling for leisure. Singapore Airlines and its budget affiliate Scoot, along with Garuda Indonesia, serve this highly trafficked route.

These top 10 busiest international routes in Asia highlight the region’s robust aviation sector, characterized by high flight frequencies and large seating capacities. The strong demand for both business and leisure travel fuels the growth of these connections, ensuring that passengers have frequent and convenient access to key cities across the continent. As the aviation industry continues to expand in Asia, these routes will remain critical links in the regional travel network.