Portugal Airport Liquid Rules: Everything You Need to Know

Flying to or from Portugal? Whether you're heading to Lisbon (LIS), Porto (OPO), Faro, or another Portuguese airport, the liquid rules for hand luggage are one of the most common points of confusion at security. These rules follow EU-wide aviation security standards designed to keep everyone safe while allowing you to bring essential toiletries, drinks, and medicines in your carry-on.

This guide covers everything you need to know about the 100 ml rule at Portuguese airports, including what counts as a liquid, how to pack correctly, exceptions, duty-free items, and airport-specific tips for Lisbon and Porto (the two busiest hubs). The information is based on official airport and EU guidelines and is designed to stay relevant for years — though security rules can evolve, so always verify on the airport website before you fly.

The standard 100 ml liquid rule in Portugal

At all major Portuguese airports, you can carry liquids, aerosols, and gels (known as LAGs) in your hand luggage only if:

• Each container holds no more than 100 ml (or 100 g for thicker items).
• All containers fit into one single transparent, resealable plastic bag.
• The bag's maximum capacity is 1 litre (roughly 20 cm x 20 cm).

You are allowed only one such bag per passenger. The golden rule: anything larger than 100 ml must go in your checked baggage.

This applies whether you're departing from Lisbon, Porto, or any other Portuguese airport, on international or domestic flights.

What counts as a liquid?

The rules cover any item of a liquid, gel, paste, or aerosol consistency. Common examples include:

• Water, soft drinks, juices, and other beverages
• Toothpaste and mouthwash
• Lotions, creams, and moisturizers
• Perfumes, aftershaves, and deodorant sprays
• Hair gel, hair mousse, and shaving foam
• Soups, syrups, jams, and soft cheeses
• Pâtés and similar spreads
• Cosmetics like mascara, lip gloss, and foundation (if liquid or gel-like)

Solid items (such as solid deodorant sticks, powder makeup, or tablet medicines) are not restricted by the liquid rules.

How to pack your liquids correctly

• Buy or bring a clear, resealable plastic bag (the standard 20x20 cm size works perfectly).
• Place all your liquids inside it — no exceptions for the 100 ml items.
• Remove the bag from your hand luggage and place it in a separate tray at security (along with your laptop, jacket, etc.).
• Make sure the bag is not overstuffed — it must seal properly.

Airports often sell these bags near security if you forget one, but bringing your own saves time and hassle.

Important exceptions to the 100 ml rule

You can carry larger quantities (and outside the plastic bag) in these cases:

• Baby food and milk (including porridge, fruit jars, yoghurts) — enough for the duration of your journey.
• Liquid medications and special dietary products — bring a doctor's note or prescription if possible to speed things up.
• Powder or tablet medicines — no restrictions (they don't count as liquids).

Security staff may ask you to taste or test these items, so keep them easily accessible.

Duty-free and transit liquids

Liquids bought after security (in duty-free shops at Portuguese airports) or on board the plane are allowed in larger containers. They must remain in the sealed, tamper-evident security bag provided by the shop, along with your receipt. Do not open the bag until you reach your final destination.

Transit note: if you have a connecting flight, keep the sealed bag intact. Some airports may re-screen it and provide a new bag if needed.

Lisbon Airport (LIS) liquid rules

Lisbon Airport follows the standard EU 100 ml rule across all terminals. For full official guidance, see the Lisbon Airport website. Head to the regular security lanes if your liquids are in the clear bag. For duty-free items, medicines, or baby food over 100 ml, use the designated lanes and declare them separately.

Pro tip: Lisbon Airport can get busy, especially in summer. Arrive early and have your liquids bag ready before you reach the scanner to avoid delays — and keep an eye on our coverage of biometric border delays at Portuguese airports for current wait times.

Porto Airport (OPO) liquid rules

Porto Airport applies the same rules as Lisbon: 100 ml per container, one 1-litre clear bag per passenger. The process and exceptions are identical — you can confirm the latest details on the Porto Airport website.

Porto is generally quicker than Lisbon at peak times, but the liquid screening process is the same — so don't assume you can sneak through with a 200 ml bottle.

What happens if you don't follow the rules?

Non-compliant liquids will be confiscated at security. There is no option to "check them in last minute" once you're at the checkpoint. To avoid this:

• Check in oversized liquids before you go through security.
• Use the 100 ml travel-sized versions of your favourite products.
• Buy full-size items at your destination or in duty-free after security.

Pro tips for a smooth security check at Portuguese airports

• Pack liquids in your hand luggage, not checked bags, when possible (to avoid loss or breakage).
• Place the clear bag in an easily accessible pocket of your carry-on.
• Remove it from your bag before you reach the scanner.
• Wear easy-to-remove shoes and have your boarding pass ready.
• If you're travelling with children or carrying medications, inform staff early — they are generally helpful.

New CT scanners that could allow larger liquids without the bag are being rolled out across Europe under the European Union Aviation Safety Agency (EASA) framework, but as of now Lisbon and Porto still require the traditional 100 ml system. Always check the airport's official site for updates before you fly.

Final advice

The liquid rules at Portuguese airports are straightforward once you know them: stick to 100 ml containers in one clear 1-litre bag, and use the exceptions wisely. For broader context on how EU rules differ across operators, see our piece on Portugal flyers and mixed EU liquid rules.

Safe travels — and enjoy your trip to Portugal! Whether you're sipping vinho verde in Porto or exploring the streets of Lisbon, a stress-free security experience makes all the difference.