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Heathrow Airport has submitted a new proposal for a third runway, aiming to address long-standing congestion issues at the West London hub. The airport currently operates at full capacity, handling nearly 84 million passengers in 2024 across about 474,000 aircraft movements. Without expansion, further growth is seen as limited.
The latest plan estimates the third runway will cost £21 billion ($27.64 billion) and would be financed entirely through private investment. This marks a departure from many infrastructure projects that rely on public funds. According to Heathrow's statement, “It has never been more important or urgent to expand Heathrow. We are effectively operating at capacity to the detriment of trade and connectivity. With a green light from the Government and the correct policy support underpinned by a fit-for-purpose regulatory model, we are ready to mobilise and start investing this year in our supply chain across the country.” This was stated by Heathrow CEO Thomas Woldbye.
The proposed runway would be located northwest of the current site and extend 3,500 meters. It would increase annual passenger capacity up to 150 million and allow for up to 756,000 flights per year. Plans also include constructing Terminal 5X, three new satellite terminals, and expanding Terminal 2. These changes are expected to add "30 new daily routes, extra domestic connections, and a better selection of flight times."
