December 2025 is about to end, and most travellers have almost finished their year-end vacations. According to aviation analytics firm OAG, airports worldwide have experienced heavy passenger traffic this month.
In India, Delhi’s Indira Gandhi International Airport has secured a spot in the world’s top 10 busiest airports, showing India’s growing presence in global air travel.
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Who’s on Top of the World’s Busiest Airports
Dubai International Airport once again topped the list as the world’s busiest airport in December 2025.
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The airport recorded around 5.5 million scheduled seats.
Top 10 World’s Busiest Airports in December 2025
Here’s the full list based on scheduled seat capacity:
- Dubai International Airport
- Atlanta Hartsfield-Jackson International Airport
- Tokyo Haneda Airport
- Guangzhou Baiyun International Airport
- London Heathrow Airport
- Shanghai Pudong International Airport
- Delhi Indira Gandhi International Airport
- Dallas/Fort Worth International Airport
- Istanbul Airport
- Chicago O’Hare International Airport
How These Rankings Are Decided
OAG ranks airports based on scheduled airline seats, not just the number of flights. OAG also prepares separate rankings for “global airports” and “international airports.” The global list is calculated using total scheduled airline capacity, covering both domestic and international flights, while the international list looks only at seats allocated to overseas routes.
This distinction is important, as airports with extensive domestic networks may appear busier by flight numbers, but not necessarily by total passenger-carrying capacity.