Towards the end of 2023, travel information company OAG released its annual list of the world's busiest international routes, with three of the top 10 involving a trip to Singapore. This is in line with the image that Singapore's Changi Airport has given to travellers around the world for many years: busy, comfortable and convenient, with access to almost all major cities in the world.
This figure is purely based on the number of seats sold on each flight in 2023. The world's busiest international route is from Malaysia's capital Kuala Lumpur to Singapore, selling a whopping 4.9 million seats. With a flight time of just over an hour, this route is popular with commuters who prefer to fly rather than drive.
The route between Singapore and Malaysia's capital city of Long Lumpur is the busiest in the worldThe 10 busiest international routes in 2023
1.Kuala Lumpur (KUL) to Singapore (Sin).
2.Cairo (CAI) to Jeddah (JED).
3.Hong Kong (HKG) to Taipei (TPE).
4.Seoul Incheon Airport (ICN) - Osaka Kansai Airport (KIX).
5.Seoul Incheon Airport (ICN) - Tokyo Narita Airport (NRT).
6.Dubai (DXB) - Riyadh (RUH).
7.Jakarta (CGK) - Singapore (SIN).
8.New York JFK - London Heathrow (LHR).
9.Bangkok (BKK) - Singapore (SIN).
10.Bangkok (BKK) - Seoul Incheon Airport (ICN).
Running from Cairo in Egypt to Jeddah in Saudi Arabia is the second busiest international route in the world. 
Seoul, South Korea to Osaka, Japan, is the fourth busiest international route in the world. 
The fifth busiest international route in the world is Seoul, South Korea to Tokyo Narita Airport. Among the top 10 busiest routes, except for the New York-London transoceanic Europe and the United States, the rest are in Asia and the Middle East. And the New York JFK to London Heathrow route is the only one in the top 10 with an increase in total capacity compared to pre-pandemic 2019.
JFK Airport.