The distances are small in Portugal and you can get almost everywhere easily and efficiently by either train, bus or ferry. However trains are usually cheaper.
Portugal by Air
The national carrier, TAP Air Portugal, flies to and from more than fifty cities in Europe, Africa, the Middle East, Macau and North and South America, as well as operating regular domestic flights between Porto, Lisbon, Faro and the Atlantic archipelagos of Madeira and the Azores, and also between the islands of Madeira and Porto Santo.
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Portugal by Train
All trains are operated by CP (Caminhos de Ferro Portugueses). If you plan to do a lot of traveling by train. It covers routes and schedules throughout the country. Timetables are also usually posted on station walls. Tickets must be purchased at the station in advance. Rail cards for tourists (Bilhetes Turisticos) will save you some money. They are valid for 7, 14 or 21 days.
Portugal by Car
International Driving Permits and foreign driving licenses are accepted. If you Traveling by taxi is relatively cheap, and in all cities plentiful. Across major towns and for shorter journeys in areas where other transportation may be limited, a taxi is worth considering.
Portugal by Coach
Coach travel in Portugal is made easy by an extensive network of privately run companies who operate with efficiency and competitive prices.