Luís de Camões Airport (Portuguese: Aeroporto Luís de Camões) is a planned international airport located in Montijo, Portugal, in the municipality of Alcochete, Setúbal District, 30 km (19 mi) by road from Lisbon, on the current site of the Montijo Air Base.

The new airport is projected to be completed in 2034, at which time the existing Lisbon Airport will be shut down. It is projected to cost up to €9 billion and will be funded from European Union funds, public-private partnerships, and airport tariffs. It will have the capability of meeting projected demand of 100 million passengers annually by 2050, an increase from current Lisbon air traffic of approximately 30 million passengers per year. The airport will have two runways with capacity for up to 95 movements per hour with the possibility of expanding to up to four runways.

The airport is to be named after 16th century poet Luís de Camões.

After years of debate on a location for a new airport near Lisbon, including the possibility of building the Ota Airport, in 2008, a location in Alcochete was chosen since it is more accessible due to nearby infrastructure such as the Vasco da Gama Bridge. Construction started in 2010; however, shortly thereafter, forced by the 2010–2014 Portuguese financial crisis and an international bailout, the project was put on hold.

In 2017, Ryanair was a major proponent of converting the Montijo Air Base into a facility for low-cost carriers; the company said that the new airport could be operational with as little as €25 million.

In October 2019, Portugal's environmental agency gave approval for construction of the airport if its meets certain conditions including sound insulation requirements and restrictions on flights between midnight and 6AM.

In March 2021, the National Authority of Civil Aviation of Portugal rejected the formal evaluation request for construction of the airport submitted by airport operator ANA Aeroportos de Portugal, citing disagreements with the nearby municipalities as well as environmental concerns. The government then evaluated changing the law or selecting another location for the airport.

In May 2024, the Portuguese government announced that the new airport will be built in Alcochete and will be ready in 2034. The decision followed the possibility of building the airport on the nearby Tagus Estuary Natural Reserve, opposed by environmental groups.