Taxis in Lisbon are relatively cheap, and the airport is so close to the city center that many visitors make a beeline for a cab queue outside the terminal. To avoid any hassle over fares you can buy a prepaid voucher (which includes gratuity and luggage charges) from the tourist office booth in the arrivals hall. Expect to pay €10–€20 to most destinations in the city center and around €40 if you're headed for Estoril or Sintra.
Drivers use meters but can take out-of-towners for a ride, literally, by not taking the most direct route. If you book a cab from a hotel or restaurant, have someone speak to the driver so there are no "misunderstandings" about your destination. The meter starts at €3.25 during the day and €3.90 at night (9 pm to 6 am) and on weekends. You pay what is on the meter. Supplementary charges are added for luggage (€1.60) and if you phone for a cab (€0.80). The meter generally isn't used for long-distance journeys outside Lisbon, so you'll have to agree on a fare.
You may hail cruising vehicles, but it's sometimes difficult to get drivers' attention; there are taxi stands at most main squares. Remember that when the green light is on, it means the cab is already occupied. Tips—no more than 10%—for reliable drivers are appreciated.
Autocoope (21/793–2756. www.cooptaxis.pt.)
Retális (21/811–9000. www.retalis.pt.)
Teletáxis (21/811–1100. www.teletaxis.pt.)