For the first time since 2023, Heathrow is no longer Europe's busiest airport. In July, Istanbul Airport welcomed 8.15 million passengers, while Heathrow recorded 7.86 million — a gap of almost 300,000. The shift marks a significant moment in the continent's aviation landscape, with the Turkish hub capitalising on its expanding network and strategic location.
Heathrow's decline was driven by a 1.5% year-on-year drop in passenger numbers, with the airport particularly affected by a 20.2% fall on Middle East routes. The ongoing conflict between Iran and the US has dampened demand for travel in the region, hitting airlines that rely on connections through hubs like Dubai and Doha. In contrast, Istanbul saw a 2.3% increase, reflecting its growing role as a bridge between Europe and Asia.
A Changing of the Guard
Heathrow had held the title of Europe's busiest airport from 1996 to 2019, according to Airports Council International data. After losing the top spot in 2020 due to pandemic travel restrictions, it regained the crown in 2023. But the latest figures suggest a more permanent shift, as Istanbul's new airport — opened in 2018 — continues to expand its capacity and route network.
The news comes as Heathrow pushes ahead with its long-awaited third runway project. The airport currently operates its two runways at near full capacity, and its expansion plan would allow it to handle up to 150 million passengers annually, up from just under 85 million in 2025. In a statement, airport representatives said the "case for expansion has never been clearer."
However, the project's future remains uncertain. Rachel Reeves, who was recently dismissed as Chancellor of the Exchequer, had hoped for a third runway by 2035. But the UK's new Prime Minister, Andy Burnham, has expressed reservations, arguing that the plans would divert investment "away from the North and traps it in London."
Despite the dip, Heathrow remains one of the world's busiest airports. Its busiest day of the year so far was 19 July, when 267,000 passengers passed through its terminals. The airport's popularity is a testament to London's status as a global city, even as other European hubs like Istanbul and Poland's growing economy reshape the continent's economic geography.
For travellers, the shift may have practical implications. Istanbul's rise as a major hub offers more options for flights to the Middle East, Asia, and Africa, often at competitive prices. Meanwhile, Heathrow's capacity constraints mean that airlines may continue to face slot shortages, leading to higher fares on some routes.
The broader trend is clear: Europe's aviation map is changing. While London remains a key financial and cultural centre, other cities are gaining ground. Leipzig/Halle airport, for instance, has become a focal point for cargo and security concerns, while Catania airport in Sicily has faced disruptions from volcanic activity. These developments highlight the diverse challenges and opportunities facing the continent's airports.
As Istanbul takes the lead, the question is whether Heathrow can reclaim its position. The third runway decision will be crucial, but political and environmental hurdles remain. For now, the crown belongs to Istanbul — a symbol of the shifting dynamics in European aviation.
