History and alternatives

Portugal has debated a new Lisbon airport for about half a century. This page keeps superseded options and images clearly labelled as history.

Facts on this page as of · Corrections

Aerial view of a military airfield with crossing runways on a peninsula surrounded by water.
“Montijo Air Base 2019”, © Jcornelius, CC BY-SA 4.0, via Wikimedia Commons. Resized to 1,600 px wide. About this image

The Independent Technical Commission examined strategic options, including Alcochete and Vendas Novas. In May 2024 the Government chose Alcochete, citing public land, a previous environmental declaration (since lapsed), proximity to Lisbon and to the main transport links. It rejected a two-airport solution as doubling environmental effects.

A complementary airport at the Montijo air base was proposed in earlier years and abandoned. An Alcochete solution received a conditional favourable environmental declaration in 2010. Images of these earlier concepts still circulate; we label them by vintage and never present them as the current design.

Illustration — not to scale, not the airport design

A schematic map with several candidate sites and one chosen. Pins are symbolic, not real locations.

Illustration: Luís de Camões Airport Observatory (original work).

The 2024 two-runway figure, split by runway

  1. First runway3,231 € million
  2. Second runway2,874 € million

Total for two runways: 6,105 € million Status: Historical / superseded

From the Government’s May 2024 strategic analysis. Price base not stated; superseded by the July 2026 estimate, which has a different scope. Data as of 18 October 2026, from the linked records. Graphic: Luís de Camões Airport Observatory (original work).

What the documents say

Open questions

No open questions recorded for this topic.

Questions answered

Why Alcochete and not Vendas Novas?

In May 2024 the Government said Alcochete is entirely on public land (Vendas Novas would require expropriations), had a previous environmental declaration (since lapsed), is closer to central Lisbon and nearer the main road and rail links.

Source: Portuguese Government (XXIV Constitutional Government) Permalink: Why Alcochete and not Vendas Novas?

What happened to the Montijo option?

A complementary airport at the Montijo air base was proposed in earlier years and later abandoned in favour of a single new airport. The Government argued in 2024 that a two-airport solution would double negative environmental effects. Montijo still appears as a municipality in the environmental register.

Source: Agência Portuguesa do Ambiente (SIAIA) Source: Portuguese Government (XXIV Constitutional Government) Permalink: What happened to the Montijo option?

Who examined the alternatives?

An Independent Technical Commission examined strategic options, including Alcochete and Vendas Novas, before the Government’s 2024 choice. Its material is on the Aeroparticipa portal.

Source: Comissão Técnica Independente Permalink: Who examined the alternatives?

Sources

  1. Tier 2 Official statement · Portuguese Government (XXIV Constitutional Government) ·

    Government chooses Alcochete as the site of the new airport

    Original: Government chooses Alcochete as the site of the new airport Link checked

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