€373 Cheap Flights Seattle to Lisbon (SEA-LIS)

View €373 flight on Tue, 5 Aug 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Humberto Delgado Airport (LIS)

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Cheap Flights from Seattle to Lisbon (SEA-LIS)

Prices were available within the past 7 days and start at €373 for one-way flights and €530 for return, for the period specified. Prices and availability are subject to change. Additional terms apply.
Aer Lingus
Mon, 4 Aug - Tue, 19 Aug
SEA
Seattle
LIS
Lisbon
€530
Return
Found 2 days ago
Select Aer Lingus flight, departing Mon, 4 Aug from Seattle to Lisbon, returning Tue, 19 Aug, priced at €530 Found 2 days ago
Aer Lingus
Mon, 4 Aug - Tue, 19 Aug
SEA
Seattle
LIS
Lisbon
€536
Return
Found 2 days ago
Select Aer Lingus flight, departing Mon, 4 Aug from Seattle to Lisbon, returning Tue, 19 Aug, priced at €536 Found 2 days ago
American Airlines
Mon, 4 Aug - Tue, 19 Aug
SEA
Seattle
LIS
Lisbon
€671
Return
Found 2 days ago
Select American Airlines flight, departing Mon, 4 Aug from Seattle to Lisbon, returning Tue, 19 Aug, priced at €671 Found 2 days ago
Turkish Airlines
Thu, 10 Jul - Wed, 23 Jul
SEA
Seattle
LIS
Lisbon
€761
Return
Found 14 hours ago
Select Turkish Airlines flight, departing Thu, 10 Jul from Seattle to Lisbon, returning Wed, 23 Jul, priced at €761 Found 14 hours ago
Air Canada
Mon, 4 Aug - Tue, 19 Aug
SEA
Seattle
LIS
Lisbon
€763
Return
Found 2 days ago
Select Air Canada flight, departing Mon, 4 Aug from Seattle to Lisbon, returning Tue, 19 Aug, priced at €763 Found 2 days ago
Air Canada
Mon, 4 Aug - Tue, 19 Aug
SEA
Seattle
LIS
Lisbon
€769
Return
Found 2 days ago
Select Air Canada flight, departing Mon, 4 Aug from Seattle to Lisbon, returning Tue, 19 Aug, priced at €769 Found 2 days ago
Air Canada
Mon, 4 Aug - Tue, 19 Aug
SEA
Seattle
LIS
Lisbon
€770
Return
Found 2 days ago
Select Air Canada flight, departing Mon, 4 Aug from Seattle to Lisbon, returning Tue, 19 Aug, priced at €770 Found 2 days ago
American Airlines
Mon, 4 Aug - Tue, 19 Aug
SEA
Seattle
LIS
Lisbon
€771
Return
Found 2 days ago
Select American Airlines flight, departing Mon, 4 Aug from Seattle to Lisbon, returning Tue, 19 Aug, priced at €771 Found 2 days ago
Swiss International Air Lines
Mon, 4 Aug - Tue, 19 Aug
SEA
Seattle
LIS
Lisbon
€787
Return
Found 2 days ago
Select Swiss International Air Lines flight, departing Mon, 4 Aug from Seattle to Lisbon, returning Tue, 19 Aug, priced at €787 Found 2 days ago
Air Canada
Mon, 4 Aug - Tue, 19 Aug
SEA
Seattle
LIS
Lisbon
€824
Return
Found 2 days ago
Select Air Canada flight, departing Mon, 4 Aug from Seattle to Lisbon, returning Tue, 19 Aug, priced at €824 Found 2 days ago
Seattle to Lisbon route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Humberto Delgado
Airlines serving
Aer Lingus, Air Canada, American Airlines, Delta, Finnair, JetBlue Airways, KLM, Lufthansa, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Return price
€529
Distance
8323 km

Perfect flights from Seattle to Lisbon

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Seattle to Lisbon. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Seattle - Tacoma Intl. to Humberto Delgado ticket options cater to your travel preferences, with incredible one-way fares from €373 and roundtrip prices from €530. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Humberto Delgado and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in Lisbon.

Frequently asked questions

How much is a flight from Seattle - Tacoma Intl. Airport (SEA) to Lisbon/Portela Airport?
Round-trip tickets from SEA to Humberto Delgado Airport (LIS) start from €530. This is based on fares advertised within the last 7 days on Expedia for flights departing within the next year — make your booking ASAP to avoid missing out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to Lisbon/Portela Airport?
We get that things crop up unexpectedly, so we’ve made it as easy as possible for you to cancel your flight online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from SEA to LIS that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for Seattle - Tacoma Intl. Airport (SEA) to Lisbon/Portela Airport flights, you’ll see a “no change fees” filter for you to select.
How far is the flight from SEA to LIS?
SeaTac to Lisbon District is around 8,400 kilometres, so get ready to spend quite a while in the air. Don’t forget to pack all the essentials, from your headphones to your hoodie. Throw in a few snacks to munch on throughout your trip too.
Which airlines fly direct from Sea-Tac Airport to LIS?
There are no direct flights, so you’ll need to make at least one stop between Sea-Tac Airport and LIS. Take advantage of the layover time to stretch your legs and freshen up.
Are SEA to LIS flight tickets cheaper when they're purchased at the last minute?
Booking your trip from SEA to Lisbon/Portela Airport at the last minute could be your ticket to a fantastic deal. However, it might cost you a whole lot more! If you’d prefer not to take any chances, book well ahead of your departure date. In fact, Expedia has some of the best bargains as far ahead as 12 months in advance. If your preferred carrier hasn’t released tickets yet, check back regularly as deals are updated all the time on Expedia.

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