London Heathrow has lost its long-standing position as Europe’s busiest airport, with Istanbul Airport overtaking it in passenger numbers for July 2026.
Heathrow recorded around 7.86 million passengers across its four terminals in July, while Istanbul Airport handled approximately 8.15 million. The difference puts Istanbul ahead by nearly 300,000 passengers for the month.
A Significant Shift in European Aviation
The change is notable because Heathrow has been Europe’s busiest airport for much of the period since 1996. It briefly lost the position during the Covid-19 pandemic, before regaining it in 2023 and holding the title since then.
Istanbul’s rise reflects the growing importance of Turkey as a major international aviation hub. Istanbul Airport has been designed to handle large volumes of international traffic and benefits from its strategic location between Europe, Asia and the Middle East.
Pressure on Heathrow
Heathrow’s July figures also highlight some of the challenges facing the UK airport. Passenger traffic on Middle Eastern routes fell by 20.2% year-on-year, with the conflict involving Israel, the US and Iran affecting travel demand on those routes.
At the same time, Heathrow continues to operate its two runways close to full capacity. The airport is seeking government approval for a third runway, arguing that additional capacity is necessary to support the UK’s connectivity and economic growth.
Heathrow handled 84.46 million passengers during 2025, demonstrating that the airport remains one of the world’s major aviation hubs despite losing the monthly European ranking.
The Bigger Picture
The shift is more than a change in an aviation league table. It highlights how competition between major European airports is evolving.
For Heathrow, capacity remains a central issue. With two runways operating near their limits, further growth is difficult without significant infrastructure expansion. Istanbul, meanwhile, has built its newer airport around long-term capacity and international connectivity.
Whether Istanbul’s lead becomes a sustained trend will depend on passenger demand, geopolitical conditions, airline networks and Heathrow’s ability to expand.
For now, however, the message is clear: Europe’s aviation landscape is changing, and Istanbul is increasingly challenging London’s traditional dominance.
