Portugal is a member of the EU. For EU nationals you enjoy the right of free movement. This means you’re entitled to travel, work and live in another EU country. If you’re a citizen of a Schengen country – which is most EU countries – you’re also free to travel to other Schengen countries (Portugal) without the need for border checks. It is recommended to still carry your passport or ID card when traveling.
Visitors from other countries, including U.S. Citizens, need a valid passport to land in Portugal. It is important to note when your passport expires. Many countries require your passport to have at least 6 months left before its expiration in order to allow you into the destination.
For information about U.S. Passports, go to http://travel.state.gov and click on “U.S. Passports.”
A citizen of a foreign country who seeks to enter Portugal generally must first obtain a visa, which is placed in the traveler’s passport, a travel document issued by the traveler’s country of citizenship.
Certain Non-EU travelers may be eligible to travel to Portugal without a visa if they meet the requirements for visa-free travel. Many citizens or nationals of participating countries can travel to Portugal for tourism or business for stays of 90 days or less without obtaining a visa, including U.S. citizens.
Citizens of all other countries must have (1) a valid passport that expires at least 6 months later than the scheduled end of their visit and (2) a Schengen short stay visa.
For a complete list of participating countries and information about Schengen Visas, go to https://vistos.mne.gov.pt/en/short-stay-visas-schengen/required-documentation/short-stay-visa