Heathrow’s sustained dominance reflects its vital role in global travel, while Istanbul’s rapid rise shows how hubs are evolving to meet demand. Our 2025 ranking underscores the balance between established gateways and ambitious challengers worldwide, which has developed over ten years of Megahubs.
John Grant, Chief Analyst
Chicago O’Hare and Atlanta Hartsfield-Jackson continue to play a vital role in connecting travelers across North America and the world. Their ability to expand destinations and connections underscores their importance in shaping the region’s aviation network.
John Grant, Chief Analyst
Since launching ten years ago, OAG’s annual Megahubs report has become the market’s definitive ranking of the most internationally connected airports in the world.
Powered by the industry’s most comprehensive and accurate airline schedules and global flight connections data, OAG’s Megahubs analysis provides essential insights on how flight connectivity evolves and grows across the world’s largest airports. Throughout the past decade, we have closely tracked how these Megahubs have developed, with their networks adapting alongside market trends, airline growth strategies, and the popularity of each destination as a stopover point.
To mark the 10th anniversary this year, we’ve examined the evolution of this year’s Top 10 Global Megahubs over the last decade - set against a backdrop of a near one-third increase in global capacity, now just over six billion seats a year.
Relative to each other, the 2025 Top 10 would have ranked quite differently in 2015, with some of the rankings changing quite considerably for some airports. This reflects the shifting balance of power across the global aviation industry.
