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:
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Jeju – Seoul (South Korea) – 1,463,017 seats
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Hanoi – Ho Chi Minh City (Vietnam) – 1,068,565 seats
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Sapporo – Tokyo Haneda (Japan) – 1,033,267 seats
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Fukuoka – Tokyo Haneda (Japan) – 1,008,078 seats
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Jeddah – Riyadh (Saudi Arabia) – 888,895 seats
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Mumbai – Delhi (India) – 715,852 seats
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Melbourne – Sydney (Australia) – 705,298 seats
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Tokyo Haneda – Okinawa Naha (Japan) – 685,528 seats
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Shanghai Hongqiao – Shenzhen (China) – 671,603 seats
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Beijing – Shanghai Hongqiao (China) – 648,021 seats
Notable Points
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Mumbai–Delhi is the sixth-busiest domestic route in the world, highlighting heavy travel between India’s two major cities during December.
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The rankings are based on scheduled seat capacity, counting flights in both directions.
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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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