Humberto Delgado Airport (IATA: LIS, ICAO: LPPT), informally Lisbon Airport and previously Portela Airport, is an international airport located seven kilometres (four nautical miles) northeast of the city centre of Lisbon, the capital of Portugal. The airport is the main international gateway to Portugal. As of 2023, it was the 12th-largest airport in Europe in terms of passenger volume, and carried 190,700 tonnes of cargo. Lisbon Airport is also the main European hub to Brazil, the largest European Star Alliance hub to South America and also an important European hub to Africa.

The airport is the main hub of Portugal's flag carrier TAP Air Portugal, including its subsidiary TAP Express, as well as being a hub for low-cost airlines Ryanair and easyJet. It is a focus city for Azores Airlines, euroAtlantic Airways, Hi Fly and White Airways. The airport is run by ANA Aeroportos de Portugal, which was concessioned to the French group Vinci SA in February 2013.

Lisbon Airport has consistently ranked dismally in customer satisfaction, with AirHelp polling it in last place amongst 132 airports in the world as of 2022. It is one of the most congested airports of Europe and one of the only major airports to have an approach path directly over the city, notwithstanding plans to build a new airport elsewhere. These plans have for decades been postponed or suspended for a myriad of reasons.