Humberto Delgado Airport, informally Lisbon Airport and previously Portela Airport, is an international airport located seven kilometres 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.

An international airport is an airport with customs and border control facilities enabling passengers to travel between countries around the world. International airports are usually larger than domestic airports, and feature longer runways and have facilities to accommodate heavier aircraft such as the Boeing 747 and the Airbus A380 commonly used for international and intercontinental travel. International airports often host domestic flights, which helps feed both passengers and cargo into international ones.