Heathrow loses its crown as Europe's busiest airport to Istanbul

In July 2026, Heathrow airport in the United Kingdom reported a significant decline in passenger numbers, with 7.86 million travelers passing through its terminals. This marked a 1.5% decrease compared to the same month in the previous year. In contrast, Istanbul airport recorded a rise in passenger traffic, accommodating 8.15 million passengers during the same period. The shift in rankings has raised concerns about Heathrow's capacity and the need for expansion, as it has been operating at near-full capacity with its two runways.

The decline in passenger numbers at Heathrow has been attributed to various factors, including the ongoing Iran-US conflict, which has negatively impacted travel on Middle East routes, resulting in a 20.2% drop in passenger numbers for that segment. Despite these challenges, Heathrow's management has emphasized the importance of expanding the airport's infrastructure to maintain its competitive edge in the aviation market. The airport's owners have proposed a plan to build a third runway, which would allow it to accommodate up to 150 million passengers annually.

The UK government has been involved in discussions regarding the expansion, with Transport Secretary Heidi Alexander launching a consultation on the Heathrow expansion national policy statement. This initiative outlines the necessary conditions for the project to proceed. Former Chancellor Rachel Reeves expressed her commitment to advancing the expansion plans, aiming for construction to begin within the current parliamentary term and to be completed by 2035. However, the current Prime Minister, Andy Burnham, has voiced concerns about the expansion, arguing that it diverts infrastructure investment away from other regions in the UK, particularly the North.

Despite the challenges, Heathrow airport experienced a busy day on July 19, 2026, with 267,000 passengers recorded, coinciding with the start of the summer holiday season for many schools. The airport also welcomed several new airlines, including ITA Airways, Alaska Airlines, and Riyadh Air, indicating a clear demand for access to Heathrow. The airport's chief executive, Thomas Woldbye, expressed optimism about the summer season and the potential for growth in the airport's route network and passenger offerings, reinforcing the argument for expansion to ensure the UK remains a leading hub in Europe.