A Vietnam Airlines plane lands at Noi Bai Airport, Hanoi, Vietnam. Photo by Read/Luu Quy
The Hanoi-HCMC flight route was again the fourth busiest globally in 2025 with 11.07 million seats, aviation intelligence firm OAG has found.
The route saw a 4% increase in seat numbers from 2024, according to a list the British company released based on seat capacity Tuesday.
The route has been in the top 10 for the last eight years, and fourth last year too.
The average one-way flight on the route cost US$67 this year, down 11% from 2024, according to OAG.
“This route is highly competitive with six carriers operating in 2025,” the company said.
Vietnam Airlines and Vietjet are the biggest operators on the 1,000-km route, with dozens of flights daily.
Newcomer Sun PhuQuoc Airways started flying on the sector in the final quarter of this year.
Bamboo Airways, Pacific Airlines and Vietravel Airlines are the others with services.
The world’s 5 busiest flight routes of 2025
| Rank | Route | Seat capacity (million seats) | Year-on-year capacity growth (%) | Average one-way ticket price (US$) | Year-on-year airfare growth (%) |
| 1 | Jeju International-Seoul Gimpo | 14.38 | 1 | 44 | -11 |
| 2 | Sapporo New Chitose-Tokyo Haneda | 12 | 1 | 97 | -11 |
| 3 | Fukuoka-Tokyo Haneda | 11.49 | 1 | 101 | -12 |
| 4 | Hanoi-HCMC | 11 | 4 | 67 | -11 |
| 5 | Jeddah-Riyadh | 9.8 | 13 | 95 | 27 |
OAG’s five busiest routes were mostly unchanged from last year, with South Korea’s Jeju International–Seoul Gimpo (14.38 million seats) holding the top spot, followed by Japan’s Sapporo New Chitose–Tokyo Haneda (12 million) and Fukuoka–Tokyo Haneda (11.5 million).
Saudi Arabia’s Jeddah–Riyadh (9.8 million) took the fifth spot from Australia’s Melbourne–Sydney (8.9 million), which fell to sixth this year.
Jeddah–Riyadh was also the fastest-growing route with a 13% increase in seat capacity.
It was also the only non-Asia-Pacific route in the top 10.
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