Lisbon is less popular with tourists than Barcelona or Paris. The people who find themselves there usually have some business or go on an excursion there. In other cases this city becomes the point og changing the planes and the passengers sit in the airport lounge for several hours tired and bored.
But even if you don’t have a plenty of time before boarding Lisbon is worth to be seen. The main thing is to plan your route carefully. If you have more than two hour don’t stay in the airport and set your feet to the downtown. The airport in Lisbon provides the tourists with the bus service for the passengers who have to wait their plane for more than an hour. In that way you will not only get entertained but also have the opportunity to make yourself acquainted with this beautiful and ancient city. Another good alternative is to take a taxi and get off in a nice street to go along a couple of blocks on foot. The taxi cars differ from each other with their colors and prices. Anyway it is better to make sure that the price is appropriate to avoid misunderstanding.