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Heathrow Airport 2025: Third Runway Delayed by Four Years

Heathrow Airport warns its planned £33bn third runway may face a four-year delay, pushing the operational timeline further back.

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Live27 Sep 2026Source: BBC Business3 min read (0 views)
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Heathrow Airport 2025: Third Runway Delayed by Four Years

Stock photo for illustration only, not from the actual event

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  • Heathrow's third runway project faces a potential four-year delay.
  • The runway construction cost is estimated at £33bn out of a £49bn total investment.
  • The airport targets planning permission by 2029 and opening within a decade.
  • Expansion aims to create 100,000 jobs and raise flights to 720,000 annually.

Heathrow Airport, the busiest airport in the United Kingdom serving over 80 million travellers annually with its two runways and four passenger terminals in west London, has warned that its planned third runway could face a four-year delay due to planning and regulatory hurdles.

The British government previously hoped the new runway at the nation's busiest aviation hub, estimated to cost £33bn for the runway alone, would open by 2035. However, Heathrow views this deadline as increasingly challenging to meet without additional steps to streamline the planning process. The airport announced on Saturday that it hopes to secure planning permission by 2029 and subsequently open the runway within a decade.

£33bnEstimated runway cost
720,000Max annual flights

Despite attracting widespread opposition from environmental campaigners and local resident groups, the expansion project is expected to generate approximately 100,000 jobs and provide a major boost to the economy as part of a broader £49bn modernization program for the airport facilities.

London Heathrow airport terminal buildings aircraft

Stock photo for illustration only, not from the actual event

The expansion plans entail demolishing hundreds of homes, diverting local rivers, and rerouting the M25 motorway between junctions 14 and 15 through a tunnel constructed beneath the new runway. Furthermore, flight numbers from the site, currently capped at 480,000 per year, could surge to 720,000, averaging nearly 2,000 daily flights.

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"There is currently no live planning application for a third runway, and we cannot comment on ongoing consultation processes or prejudice them in a way that will only delay progress."

Department for Transport (DfT) Spokesperson

London Mayor Sadiq Khan has consistently opposed the new runway, warning of severe impacts regarding noise pollution, air quality, and climate change. Meanwhile, government climate advisers cautioned last week that the expansion should only proceed if airlines are mandated to pay for cleaner flying, a requirement that could ultimately drive up airfare costs.

Balancing major infrastructure growth with strict environmental commitments remains a pivotal policy challenge in the UK. As the project navigates planning hurdles and local opposition, the final outcome will heavily depend on parliamentary approval and how policymakers address net-zero targets alongside economic expansion.

A draft of the planning framework for the expansion was published in June for public consultation. Once finalized, the framework must be submitted for a parliamentary vote, which reports suggest could be pushed back until 2027.

Source: BBC Business

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