Heathrow Plans £10bn Expansion to Add 10m Passengers

London Heathrow Airport is preparing a bold vision for its future. The operator has announced a privately funded £10 billion investment plan to increase passenger numbers by around 10 million annually by 2031—without building a third runway or adding new terminals. Instead, its expansion will focus on optimising existing infrastructure across Heathrow Terminal 5, Heathrow Terminal 3 upgrades, and more.

Here’s what to know about this transformative Heathrow investment plan.

What the proposal entails

In its 2027–2031 business plan, submitted to the Heathrow Civil Aviation Authority (CAA), Heathrow unveiled a £10 billion investment initiative aimed at boosting capacity to around 92 million annual passengers—an increase of roughly 12% based entirely on reshaping existing infrastructure, particularly the Heathrow Airport masterplan strategy of internal renewal.

The scheme includes demolishing Terminal 1, extending Terminal 2, and constructing a southern road tunnel to improve connectivity to the Central Terminal Area, as well as expanding passenger lounges, retail outlets, and dining options across approximately 70,000 sqm—equivalent to ten football pitches.

The funding is fully private, including £2 billion in equity from shareholders, and is designed to keep landing charges—now averaging £33.26 per passenger—lower in real terms than they were a decade ago. While airlines have expressed concern that higher charges may eventually filter through to ticket prices, Heathrow insists this plan supports airline growth and upgrades passenger experience through improved loyalty and efficiency.

What to expect from the Heathrow Investment Scheme

Upgrading the journey inside terminals

The upgrade promises a more comfortable and smoother journey through the airport—with targets to ensure 95% of passengers queue at security for under five minutes, 99% of luggage travels with its owner, and 80% of flights depart on time. This infrastructure upgrade focuses on streamlining passenger flow through enhanced Heathrow flight capacity and a shift toward a more modern hub experience.

It also includes new Heathrow lounges and enhanced retail and dining to deliver a more premium feel. These improvements can make your pre-flight moments more enjoyable, especially when you’re planning Avios upgrades or using BA Companion Voucher perks. Before using a voucher, read the BA Companion Voucher rules.

Sustainability at the heart of expansion

The plan emphasises Heathrow sustainability plans: Heathrow commits to cutting 3 million tonnes of carbon—about 15% of its 2024 footprint—installing noise insulation for 6,500 homes and 15 schools, maintaining 100% renewable electricity, reducing waste by 10%, and increasing recycling by 20%.

What this means for Avios collectors

So how does this new chapter for London Heathrow Airport affect travellers using Avios? Plenty. As airports modernise and capacity grows, new opportunities for Avios flights, British Airways reward flights, and business class deals emerge. A smoother terminal experience means more smoother connections for holidaymakers and business travellers alike.

Using tools like our Reward flight finder, you can search and track Reward flight availability, compare redemptions, and plan routes. For example, if you’re sitting on a surplus of BA Avios or a BA tier points wedge, this fresh capacity may translate into better options—especially for British Airways long haul Avios travel or impulse Avios upgrades.

Planning smarter in a growing airport

With the Heathrow expansion delivering more capacity and improved flows, it’s wise to revisit your Avios booking tips:

• Use the BA Avios Calculator to estimate redemption cost and compare with cash fares.
• Check for Best Avios redemptions early—upgraded lounges and efficient terminals make long-haul redemptions even more worthwhile.
• Use Reward Flight Finder (RFF) to Search & Book Avios flights around busy seasons like summer travel, when demand typically surges.

As capacity expands, more choice means more ways to redeem and more opportunities to make those points worth even more.

Next steps and outlook

With the Heathrow investment plan now under review by the Civil Aviation Authority Heathrow, a verdict is expected soon. If approved, transformation begins in earnest, and UK travellers stand to benefit from a more efficient, modern, and passenger-friendly Heathrow Airport.