Heathrow projects third runway 'to be operational by 2035' 

Heathrow expects to provide its business plan for the 2027-31 period to the aviation regulator this summer as it projected a third runway could be operational in a decade.

The London hub claimed it would deliver “tangible benefits” for customers after “extensive engagement” with airlines to shape the scheme.

“The plan will outline the outcomes that customers can expect and provide value for our customers with the aim to submit the plan to the CAA (Civil Aviation Authority) this summer,” Heathrow said. 

The timeline for regulating Heathrow’s future costs have been delayed after the government backed a third runway. The final decision is now expected in April 2027.

Airlines have argued that they are not prepared to carry extra potential costs from development of an addition runway at Heathrow.

In a trading statement for the three months to March 31, Heathrow said: “Work continues at pace towards the submission of our proposal to ministers by the summer.

“Our plans would be entirely privately funded and have the potential to kick-start economic growth across the whole of the UK from construction through to operation. 

“Depending on the government’s response, we would aim to meet their ambition to secure planning permission in this Parliament and for the runway to be operational by 2035. 

“New capacity would boost competition and choice for consumers, drive economic growth for the UK and improve operational resilience at the UK’s hub airport.”

Revenue for the first quarter of the year rose by 2.1% year-on-year to £825 million, driven by more long-haul flying, and improved property and retail income.  

Adjusted earnings [ebitda] increased 2.5% to £454 million despite passenger numbers declining to 18.2 million from 18.5 million in the same period in 2024.

Heathrow expects overall passenger demand this year to exceed 2024 levels.

Chief financial officer Sally Ding said: "2025 will be a pivotal year for Heathrow as we finalise our business plan for the next five years and submit our proposals to government to unlock new capacity at the UK’s gateway to growth. 

“Our focus on steadily improving operational performance is yielding results, and our future plans will enable us to deliver better value and more growth for our customers and the country."