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The Busiest Domestic Flight Route in Every Region, Mapped
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Key Takeaways
- South Korea hosts the world’s busiest domestic flight route, with 14.4 million scheduled seats between Jeju and Seoul Gimpo in 2025.
- In North America, Vancouver–Toronto ranks as the busiest route in 2025 with 3.7 million seats, just ahead of Los Angeles–New York JFK.
In 2025, an estimated five billion passengers took to the skies, with airline revenues projected to surpass $1 trillion.
Overall, the Asia-Pacific region was a leading driver of growth, with passenger travel up 10% over the year, largely driven by China and India. In 2026, passenger volume in the region is forecast to increase by another 7%.
This graphic shows the busiest domestic flights by region in 2025, based on data from OAG.
Top Domestic Flights by Region
Here are the busiest domestic flight routes by scheduled seat capacity in each region:
| Region | Busiest Domestic Airline Route 2025 | Airport Codes | Number of Seats |
|---|---|---|---|
| Asia-Pacific | Jeju - Seoul Gimpo | CJU – GMP | 14.4M |
| Middle East | Jeddah - Riyadh | JED – RUH | 9.8M |
| Latin America | Bogotá - Medellin | BOG – MDE | 6.2M |
| Africa | Cape Town - Johannesburg | CPT – JNB | 5.5M |
| North America | Vancouver - Toronto | YVR – YYZ | 3.7M |
| Europe | Barcelona - Palma | BCN – PMI | 3.0M |
In 2025, scheduled seat capacity between Jeju and Seoul totaled 14.4 million, and over much of the past decade, it has been the busiest route globally.
Around 200 flights operate daily between Jeju International and Seoul Gimpo, the highest frequency of any route worldwide. Often dubbed the “Hawaii of South Korea,” Jeju continues to grow as a major tourist destination.
In the Middle East, Jeddah to Riyadh saw 9.8 million scheduled seats, rising 13% over the year. Jeddah houses Saudi Arabia’s busiest port, while the capital is a key hub for economic activity.
As we can see, Bogotá to Medellin in Colombia ranks highest in Latin America, with 6.2 million scheduled seats. Meanwhile, Cape Town to Johannesburg saw 5.5 million seats, the busiest in Africa.
The Top 10 Busiest Flight Routes in the World
When it comes to the busiest domestic flights overall in 2025, the Asia-Pacific region holds nine of the top 10 flights:
| Airline Route | Region | Number of Seats | Change vs 2024 |
|---|---|---|---|
| Jeju International - Seoul Gimpo | Asia-Pacific | 14.4M | 1% |
| Sapporo New Chitose - Tokyo Haneda | Asia-Pacific | 12.1M | 1% |
| Fukuoka - Tokyo Haneda | Asia-Pacific | 11.5M | 1% |
| Hanoi - Ho Chi Minh City | Asia-Pacific | 11.1M | 4% |
| Jeddah - Riyadh | Middle East | 9.8M | 13% |
| Melbourne - Sydney | Asia-Pacific | 9.0M | -3% |
| Tokyo Haneda - Okinawa Naha | Asia-Pacific | 8.1M | 0% |
| Mumbai - Delhi | Asia-Pacific | 7.6M | -4% |
| Beijing - Shanghai Hongqiao | Asia-Pacific | 7.5M | -3% |
| Shanghai Hongqiao - Shenzhen | Asia-Pacific | 7.1M | 5% |
High flight frequency and close proximity between major cities have helped drive the region’s airline industry. At the same time, rapid economic growth in countries such as India and Vietnam is fueling increased air traffic as incomes rise.
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