London Heathrow has been knocked off the top of the European airport rankings, with new figures showing Istanbul Airport handled more passengers at the start of the year.
Heathrow processed 6.5 million travellers in January, while Istanbul reached 6.9 million, continuing its rapid ascent as one of the continent’s dominant hubs.
The shift highlights a long‑standing challenge for Heathrow: it is running at full capacity. Airport leaders say the lack of room to grow is restricting the UK’s ability to compete for new routes and airline partnerships. Heathrow argues that expansion – including the long‑debated third runway – is essential if the UK wants to maintain its status as a global aviation gateway. Although the government has backed the project, it still faces a lengthy planning process, meaning any new runway would not open until the mid‑2030s at the earliest.
Despite slipping behind Istanbul, Heathrow recorded its busiest February on record, welcoming 5.8 million passengers – a 1.9% increase on the same month last year. Airlines have been operating larger and fuller aircraft, helping the airport push numbers higher even without additional runway capacity. Across January and February combined, Heathrow handled 12.3 million passengers, up 2.1% year‑on‑year.
However, the airport expects March figures to be affected by the conflict in the Middle East. CEO Thomas Woldbye said Heathrow is monitoring the situation closely and working with airlines to minimise disruption during what he described as a “challenging operational environment”.
The broader picture is clear: Europe’s fastest‑growing hubs are those with space to expand. Istanbul, designed for scale and rapid growth, continues to add capacity and routes. Heathrow, meanwhile, is trying to compete with infrastructure that has barely changed in decades. Unless expansion moves forward, the UK risks watching more global traffic and economic opportunity shift elsewhere.