World’s Busiest Domestic Flights in December 2025 – As December 2025 comes to a close, airports around the world have seen a surge in travel due to the holiday season. According to OAG, a global travel data provider, these are the busiest domestic flight routes based on the number of scheduled seats:
Jeju – Seoul (South Korea) – 1,463,017 seats
Hanoi – Ho Chi Minh City (Vietnam) – 1,068,565 seats
Sapporo – Tokyo Haneda (Japan) – 1,033,267 seats
Fukuoka – Tokyo Haneda (Japan) – 1,008,078 seats
Jeddah – Riyadh (Saudi Arabia) – 888,895 seats
Mumbai – Delhi (India) – 715,852 seats
Melbourne – Sydney (Australia) – 705,298 seats
Tokyo Haneda – Okinawa Naha (Japan) – 685,528 seats
Shanghai Hongqiao – Shenzhen (China) – 671,603 seats
Beijing – Shanghai Hongqiao (China) – 648,021 seats
Notable Points
Mumbai–Delhi is the sixth-busiest domestic route in the world, highlighting heavy travel between India’s two major cities during December.
The rankings are based on scheduled seat capacity, counting flights in both directions.
Jeju–Seoul continues to be the busiest domestic corridor globally.
Travel trends like these show which cities and routes are most in demand during peak holiday seasons.
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