Portugal has three international airports, Lisbon, Faro and Porto. These three airports cover the entire country, and provide numerous international routes, which are flown by a variety of airlines including national and low-cost airlines. The islands of Madeira and Azores each have their own airports and have regular flights back to the Portuguese mainland.
Lisbon airport (LIS) is the main international airport of Portugal and this is the airport to fly into for the entire central region. The airport handles the highest number of international flights and most flights from outside of Europe fly into Lisbon. Lisbon airport is conveniently located within the city limits and is connected to the metro and bus network for easy onward travel.
Faro airport (FAO) serves the southern side of Portugal and this region of stunning beaches and enjoyable resort towns is referred to as the Algarve. The number of flights and passenger levels fluctuates during the year, with most travellers passing through the airport during the long summer season (June-September). There is almost no public transport from Faro airport, so pre-book onward travel.
The north of Portugal is served by Porto airport (OPO). The airport is becoming a hub for low cost airlines and the number of flights outside of European is increasing. Generally, there is not massive seasonal variation as experienced by Faro airport. The airport is outside of the city limits but is connected to the metro and is easy for onward travel
There is no airport which serves the eastern side of Portugal, so if you want to get to central Portugal, fly into Lisbon, and for the north eastern side of Portugal, fly into Porto. The Algarve regional railway serves the entire southern coastline but is very slow, pre-arranged transfers are recommended for resorts not close to Faro airport.