'No Expansion, Not Now or Ever': Thousands Protest at Barcelona Streets Over Airport Plans

Thousands of people marched through central Barcelona on Sunday, 20 September, opposing plans to expand Josep Tarradellas Barcelona-El Prat Airport over fears that the project will damage protected natural areas and intensify mass tourism.

The demonstration, organised by the Zeroport platform under the slogan 'No to the expansion, not now nor ever', drew around 5,500 people according to Barcelona's municipal police. Organisers put attendance at more than 30,000.

'Not Now Nor Ever'

Protesters gathered around Passeig de Gràcia and Carrer d'Aragó at midday before marching towards Plaça de Sant Jaume. Cyclists and tractors joined the demonstration alongside environmental, neighbourhood, social and trade union groups.

Their opposition centres on a proposed extension of the airport's sea-side runway by about 500 metres. The plan is intended to improve Barcelona's ability to handle long-haul flights, but its location beside the environmentally sensitive Llobregat Delta has made it deeply contentious.

Aena acknowledges that extending the runway would affect specially protected areas around La Ricarda and neighbouring land within the European Union's Natura 2000 network. The airport operator says any development would require environmental assessment and extensive compensation measures.

Protesters argue those measures cannot justify expanding aviation infrastructure in an area already facing climate and tourism pressures.

Airport Growth Meets Overtourism Backlash

Zeroport says a larger airport could bring between 10 million and 15 million additional tourists to Barcelona each year and estimates expansion could increase the airport's emissions by 40 per cent. Those figures are campaigners' estimates rather than independent government forecasts.

The group argues additional visitors would worsen pressure on housing, public spaces and infrastructure in a city where mass tourism has already generated repeated protests.

Campaigners instead called for greater investment in railways and public transport, with demonstrators carrying messages demanding fewer flights and better train connections.

The protest came days after Spain approved its airport investment programme for 2027 to 2031. Around €1.76 billion (£1.51 billion) is allocated to Barcelona-El Prat for upgrades including work on its terminals and airfield.

However, the physical 500-metre runway extension is not funded under that programme. Around €191 million (£164 million) has been allocated to preparatory measures connected to a possible future expansion, including environmental compensation.

Why the 500 Metres Matter

The proposed extension would affect an airport surrounded by protected parts of the Llobregat Delta. Aena says the project would have to comply with European environmental requirements and has proposed creating or restoring natural areas to compensate for affected habitat.

For opponents, however, the dispute is about more than 500 metres of concrete. It represents a wider argument over whether Barcelona should continue expanding its capacity for visitors while residents raise concerns about housing, emissions and overcrowding.

The renewed opposition shows how the airport has become a focal point for competing visions of Barcelona's future, balancing international connectivity and economic growth against environmental protection and residents' concerns about the city's long-term sustainability and quality of life.

Sunday's march revived a battle that previously erupted in 2021, when thousands also demonstrated against an earlier expansion proposal.

Five years later, protesters are again trying to make their position unmistakable: Barcelona's airport should not become bigger, whether the expansion comes now or later.