Portland International Airport PDX to Lisbon LIS Flights

The cheapest month for a flight from Portland International Airport to Lisbon is September.

Yes, you can take a between Portland International Airport and Lisbon.

Lisbon is within the Schengen Area. Passport and visa requirements depend on your nationality. Entry and visa requirements can be subject to change. For the latest information, check with your destination's embassy or consulate.

There is a time difference of 8 h between Portland International Airport and Lisbon all year round.

Some of the most interesting sights to explore in Lisbon are:

• Belém Tower, a UNESCO World Heritage site and iconic symbol of Lisbon's maritime history
• Jerónimos Monastery, a stunning example of Manueline architecture with significant historical importance
• São Jorge Castle, a historic fortress offering panoramic views of the city
• Oceanário de Lisboa, one of the largest indoor aquariums in Europe featuring diverse marine life
• Lisbon Cathedral, the oldest church in the city with a mix of architectural styles.

The best things to do in Lisbon include:

• Ride Tram 28, a vintage tram that takes you through Lisbon's historic neighborhoods
• Discover Alfama, the oldest district in Lisbon known for its narrow streets and traditional Fado music
• Stroll through LX Factory, a trendy area with shops, restaurants, and art spaces in a former industrial complex
• Visit the Calouste Gulbenkian Museum, showcasing an impressive collection of art from around the world
• Enjoy a sunset at Miradouro da Senhora do Monte, offering breathtaking views over Lisbon.

For international flights we recommend to arrive 2.5 to 3 hours before departure. Please check the website of your departure airport if in doubt. Some airports may offer booking time slots for security checks or offer additional information on when to get there based on time of day.

Most airlines permit carry-on bags that fit within specific dimensions (e.g., 22 x 14 x 9 inches or 56 x 36 x 23 cm), including handles and wheels. Bags must fit in the overhead bin or under the seat in front of you.

Many airlines impose weight limits, commonly ranging between 7 kg (15 lbs) and 12 kg (26 lbs). Typically, passengers are allowed one carry-on bag and one personal item (for example a purse, laptop bag, or backpack). Personal items must fit under the seat in front of you. Budget Airlines (like Ryanair or Wizz Air) have stricter size and weight limits, often requiring fees for larger carry-ons. Full-Service Airlines have more lenient policies, sometimes including more spacious dimensions or higher weight limits depending on your ticket class.

The list of items prohibited on an airplane varies by country and airline, but in general, the following items are not allowed in carry-on or checked baggage: Weapons and self-defence items, sharp objects, flammable materials, explosives, toxic substances, or liquids over 100ml (except for medications and baby essentials). In checked baggage, firearms (without authorization), explosives, large lithium batteries, and hazardous chemicals are prohibited. Electronic cigarettes must be in carry-on bags, while alcohol and dry ice have restrictions. Always check with your airline for specific regulations.

Portugal uses the euro (€) as its currency. Travelers generally find it convenient to use cards for most transactions, especially in cities and larger establishments, while carrying some cash is advisable for small vendors, markets, or remote areas where card acceptance may be limited.

In Lisbon, travelers should be cautious of pickpocketing, especially in crowded areas like trams, metro stations, and popular tourist spots such as Alfama and Baixa. Common scams include unofficial taxi drivers overcharging or taking longer routes and street vendors selling counterfeit goods. It's advisable to use authorized transportation and keep valuables secure to ensure a safe visit.

Pack lightweight, versatile clothing suitable for the destination's climate, and use secure, lockable luggage to protect belongings. Keep essential items like travel documents, medication, and valuables in a carry-on bag for easy access. Use packing organizers or cubes to maximize space and maintain order. Lastly, include a small first aid kit and personal hygiene items for added comfort during travel.