The Climate Change Committee (CCC), an independent advisory body, has proposed a significant increase in airfares to support the United Kingdom’s efforts to reach net zero carbon emissions by 2050. The committee recommends implementing a “polluter pays” model that would raise the cost of flying by as much as £600 for a family holiday to Europe, with the intention of both reducing demand and funding sustainable aviation fuel (SAF) production.
The recommendation, expected to be presented to ministers this week, suggests a phased increase in fares amounting to 6p to 9p per mile by mid-century. Under this model, a return flight to Alicante would become approximately £150 more expensive, while a family of four would face an additional £600 in costs. Transatlantic journeys would be similarly affected, with a single return ticket to New York rising by an estimated £400.
The suggestion follows the planned expansion of Heathrow Airport with a third runway, currently aimed for approval by 2029. The CCC asserts that any new capacity at Heathrow should be conditional on the aviation sector taking responsibility for its emissions and financing the transition from conventional kerosene to greener alternatives, such as SAF.
Nigel Topping, chair of the CCC, stressed that aviation emissions were projected to increase even without Heathrow’s expansion, and that a credible plan to reduce these emissions is currently lacking. “The Government cannot expand Heathrow Airport without requiring the aviation industry to clean up its emissions,” he said. Topping also highlighted that climate change impacts, underscored by recent heatwaves, make it imperative to limit every ton of greenhouse gases emitted.
The committee’s report points out that, by 2050, aviation is expected to represent nearly all remaining UK carbon emissions, given broader decarbonisation across other sectors. The carbon footprint associated with Heathrow’s expansion alone would surpass that of any other economic sector in the country. The CCC further noted that penalising frequent air travellers, particularly the wealthiest 20 percent who account for a large share of flights, would be warranted, given that half of people in England do not fly abroad.
The proposal has drawn criticism from industry representatives. Tim Alderslade, chief executive of Airlines UK, warned that the suggested fare increases risk making flying unaffordable for many, reverting to an era when air travel was accessible only to the wealthy. He argued that the path to tackling climate change through the aviation sector must remain affordable and pointed to ongoing airline investments in new aircraft, sustainable fuels, and airspace optimization as evidence of industry commitment.
The Confederation of British Industry (CBI) echoed the need for balanced solutions, calling for progress in airspace reform, scaling SAF production, and advancing carbon removal technologies, rather than relying solely on fare hikes. Heathrow Airport stated that passengers already contribute billions through carbon taxes and contended that a growing aviation sector could provide substantial economic and social benefits to the UK.
As the government reviews the CCC’s recommendations alongside plans for Heathrow’s expansion, the debate highlights the challenges of aligning climate ambitions with economic and consumer interests in the UK’s aviation future.