Portugal asks only that your passport stay valid for the duration of your visit — there is no post-departure validity rule of its own.
Valid for planned stay. EU nationals can use national ID.
Portugal's own requirement is validity for your stay, and EU/EEA nationals can generally travel on a national ID card. If you hold a non-EU/EEA passport, the Schengen-wide minimum is what airlines actually check: valid for at least 3 months beyond your planned departure from the Schengen Area, and issued within the previous 10 years. The 10-year clause catches renewed passports that were issued with extra months carried over from an old one.
Entry and passport rules for Portugal change without much notice, and airlines apply IATA TIMATIC data that sometimes differs from the published policy. Verify with the Portugal embassy or consulate, or your own government's travel advisory, before you book non-refundable travel.
Fill in your passport expiry, destination, and travel dates to check validity.
What is it? Many countries — especially in Asia, Africa, and the Middle East — require your passport to remain valid for 6 months beyond your return date, not just your trip dates. So if you return on June 1, your passport must be valid until at least December 1.
Why does it exist? Governments want to ensure that if something goes wrong (medical emergency, extended stay, visa overstay), your passport doesn't expire while you're in the country. It also gives embassies time to process documentation if you need to be repatriated.
Who enforces it? Both airlines and border officials. Airlines check at check-in — if your passport doesn't meet the destination's requirements, they'll deny boarding and you'll lose your ticket. Immigration officers at the destination do a second check on arrival.
Which countries have the strictest rules? Thailand, Vietnam, Indonesia, Malaysia, Philippines, India, China, Egypt, Morocco, Jordan, UAE, South Africa (which also requires 2 blank pages), Kenya, and Tanzania all strictly enforce the 6-month rule.
EU/Schengen special case: Most Schengen countries require 3 months of validity after your planned departure from the Schengen Area — not 6 months. UK, Canada, Australia, and Japan generally require validity only for the duration of stay.
✈ Rule of thumb: Renew your passport if it has fewer than 12 months remaining before an international trip. This gives you full flexibility and covers the 6-month rule for any destination.