Each year, more than 13 million passengers travel on commercial aircraft between Gimpo Airport in Seoul and Jeju Island.
On average, there is one flight every eight minutes between the capital city of Seoul and the resort island of Jeju, with up to 180 scheduled flights each day. This means that over 36,000 passengers jump 449 km per day on average. A total of seven airlines compete on this route.
The second busiest line is Sydney to Melbourne, which has seen 10 million passengers travel between Australia’s two largest cities, far behind Seoul-Jeju in first place.
Interestingly, the seven busiest lines in the world are all domestic, with flights from Tokyo Haneda to Sapporo and Fukuoka also in the top ten.
Other busy domestic routes include Bombay to Delhi in India and São Paulo (CGH) to Rio de Janeiro (SDU), both of which have more than 40,000 flights per year.
Only 18 of the 100 busiest lines are international.
The busiest international airline in the world is Hong Kong to Taiwan Taoyuan, which handles more than 6.7 million passengers.
With the journey from Hong Kong to Taipei only 800 km, and all the other top ten links being domestic, as well as short-haul links, it is questionable whether better land transport links could be provided for these short domestic journeys, such as train and ferry.
One of the most popular long-haul international routes has long been London Heathrow to New York JFK, but with 2.9 million annual passengers, this route has now been replaced by London Heathrow to Dubai as the London Airport’s most popular international route.
Although the list published by the OAG was compiled from full annual data in 2018, the numbers are likely to remain high.
The 10 busiest domestic lines in the world:
- Seoul Gimpo – Jeju: 79,640 flights
- Melbourne – Sydney: 54,102 flights
- Mumbai – Delhi: 45,188 flights
- São Paulo – Rio de Janeiro: 39,747 flights
- Fukuoka – Tokyo Haneda: 39,406 flights
- Hanoi – Ho Chi Minh City: 39,291 flights
- Sapporo – Tokyo Haneda: 39,271 flights
- Jakarta – Surabaya: 37,762 flights
- Los Angeles – San Francisco: 35,365 flights
- Jeddah – Riyadh: 35,149 flights
The 10 busiest international lines in the world:
- Kuala Lumpur – Singapore: 30,187 flights
- Hong Kong – Taipei: 28,447 flights
- Jakarta – Singapore: 27,046 flights
- Hong Kong – Shanghai: 20,678 flights
- Jakarta – Kuala Lumpur: 19,741 flights
- Seoul Incheon – Osaka: 19,711 flights
- New York LaGuardia – Toronto: 17,038 flights
- Hong Kong – Seoul Incheon: 15,770 flights
- Bangkok – Singapore: 14,698 flights
- Dubai – Kuwait: 14,581 flights