The Portuguese government has announced to building of a new international airport in the municipality of Alcochete, across the River Tagus from Lisbon.

The new airport will be constructed at a military airfield in Alcochete, about 40 km east of Lisbon, and is expected to be operational by 2034. It will replace Lisbon's Humberto Delgado airport, located near the city center, which will be expanded during the new airport's construction. The project, costing up to EUR 9 billion (US$ 9.78 billion), will be funded by EU funds, public-private partnerships, and airport tariffs, not the state budget. The government will negotiate with airport operator ANA, owned by Vinci, and plans to build a third bridge over the Tagus River for better connectivity.