Portugal's government is pushing airport operator ANA to open the new Luís de Camões Airport in Lisbon by 2034, but the project still lacks full environmental approval and construction has not started on a site bordering the country's largest wetland, covering more than 14,000 hectares.

The planned greenfield airport is meant to replace Humberto Delgado Airport, which sits in a built-up area of central Lisbon and already operates well beyond its design capacity threshold. The replacement project dates back 28 years, during which planners have examined sites both north and south of the capital without settling definitively on one.

What has changed in the project's scope?

Luís de Camões was originally conceived as a low-cost reliever facility for the capital. Events have overtaken that framing: the airport is now positioned as a full replacement for Humberto Delgado, raising the stakes for both capacity planning and the carriers that depend on Lisbon's slot-constrained infrastructure.

The site selection favors surface transport connections, one of the few aspects of the location planners consider settled. The problem lies next door.

Why does the environmental question matter?

The chosen location sits precariously close to environmentally protected areas. A strategic environmental assessment is still pending, and even once its findings are published, only conditional approval appears likely under current conditions.

That constraint has a direct consequence: the wetland in question is not a minor designation. It is Portugal's largest, spanning over 14,000 hectares, and any airport operating beside it will face scrutiny that could shape layout, traffic volumes and operational flexibility for decades.

Environmental opposition has delayed or derailed airport projects across Europe, and Lisbon fits the pattern of a facility need colliding with protected-land constraints.

How does the TAP privatisation complicate matters?

A further variable is the looming partial sale of flag carrier TAP Air Portugal, most probably to a very large European airline consortium. Prospective buyers would inherit an unusual operating proposition: a hub potentially sharing its footprint with a nature reserve.

For any bidder valuing TAP's network and Lisbon's growth potential, the pace and final design of Luís de Camões will factor into what the carrier is worth and where it can expand.

What happens next?

The government wants ANA to move faster toward the 2034 opening date. Whether that target survives depends on the strategic environmental assessment, the conditions attached to any approval, and whether 28 years of site-hunting finally concludes with shovels in the ground.