The busiest airline route in 2024 is Hong Kong (HKG) to Taipei (TPE) with 6.8 million seats. It last held the top spot in 2019.
Malaysia’s Kuala Lumpur (KUL) to Singapore’s Changi (SIN) — the busiest international airline route last year — has dropped to fourth place in 2024 with 5.4 million seats, just 0.5% behind the third place, according to data by flight statistics firm OAG.
This route is still above 2023 levels by 10% and is just below 2019 levels by 3%.

