London Heathrow held onto its crown as Europe’s busiest airport in 2025, but Istanbul Airport is catching up fast — coming within just 40,000 passengers of taking the top spot.
Figures from airport association ACI Europe show Heathrow handled 84.48 million passengers last year, a slight 0.7% increase driven by airlines operating larger aircraft to maximize capacity at the UK’s busiest hub.
Istanbul Airport, meanwhile, continued its rapid rise with a 5.5% jump to 84.44 million passengers, extending its impressive growth since opening in 2018. Turkey’s location between Europe and Asia has been key to this boom, helping the airport become a major hub for international connections — particularly for flights linking Russia to the rest of the world amid Western sanctions.
Although the UK government has approved a third runway to ease Heathrow’s congestion, it isn’t expected to be completed before 2035, potentially giving Istanbul time to surge ahead.
Other leading airports included Paris Charles de Gaulle with 72 million passengers, Amsterdam Schiphol with 68.8 million, and Madrid Barajas with 68.1 million. Across Europe, overall passenger numbers rose 4.4% last year to 2.6 billion, with the increase driven entirely by international travel, according to ACI Europe.
“Travel is still one of the top ways people choose to spend their discretionary income,” said Olivier Jankovec, ACI Europe’s Director General. He noted that the aviation industry continues to benefit from the post-pandemic rebound, but growth is expected to slow to around 3.3% in 2026.
Jankovec added that geopolitical tensions and global economic trends could challenge the sector’s resilience in the coming months.