$337 Cheap Flights from Seattle (SEA) to Lisbon (LIS)

View $337 flight on Fri, Mar 20, 2026Opens in a new window

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

Cheap Flights from Seattle to Lisbon (SEA-LIS)

Prices were available within the past 7 days and start at $337 for one-way flights and $397 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Wed, Nov 19 - Sun, Nov 23
SEA
Seattle
LIS
Lisbon
$397 Roundtrip, just found
$397
Roundtrip
just found
Select Icelandair flight, departing Wed, Nov 19 from Seattle to Lisbon, returning Sun, Nov 23, priced at $397 just found
American Airlines
Sun, Jan 4 - Mon, Jan 12
SEA
Seattle
LIS
Lisbon
$446 Roundtrip, found 17 hours ago
$446
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Sun, Jan 4 from Seattle to Lisbon, returning Mon, Jan 12, priced at $446 found 17 hours ago
British Airways
Wed, Feb 4 - Thu, Feb 12
SEA
Seattle
LIS
Lisbon
$449 Roundtrip, just found
$449
Roundtrip
just found
Select British Airways flight, departing Wed, Feb 4 from Seattle to Lisbon, returning Thu, Feb 12, priced at $449 just found
Iberia
Wed, Jan 21 - Thu, Jan 29
SEA
Seattle
LIS
Lisbon
$459 Roundtrip, found 5 hours ago
$459
Roundtrip
found 5 hours ago
Select Iberia flight, departing Wed, Jan 21 from Seattle to Lisbon, returning Thu, Jan 29, priced at $459 found 5 hours ago
Lufthansa
Wed, Nov 26 - Tue, Dec 2
SEA
Seattle
LIS
Lisbon
$472 Roundtrip, found 1 day ago
$472
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Wed, Nov 26 from Seattle to Lisbon, returning Tue, Dec 2, priced at $472 found 1 day ago
Air Canada
Tue, Nov 18 - Wed, Dec 3
SEA
Seattle
LIS
Lisbon
$486 Roundtrip, found 20 hours ago
$486
Roundtrip
found 20 hours ago
Select Air Canada flight, departing Tue, Nov 18 from Seattle to Lisbon, returning Wed, Dec 3, priced at $486 found 20 hours ago
United
Sun, Nov 30 - Fri, Dec 12
SEA
Seattle
LIS
Lisbon
$491 Roundtrip, found 2 hours ago
$491
Roundtrip
found 2 hours ago
Select United flight, departing Sun, Nov 30 from Seattle to Lisbon, returning Fri, Dec 12, priced at $491 found 2 hours ago
Scandinavian Airlines
Tue, Mar 17 - Fri, Mar 20
SEA
Seattle
LIS
Lisbon
$526 Roundtrip, found 2 days ago
$526
Roundtrip
found 2 days ago
Select Scandinavian Airlines flight, departing Tue, Mar 17 from Seattle to Lisbon, returning Fri, Mar 20, priced at $526 found 2 days ago
Delta
Wed, Feb 4 - Thu, Feb 12
SEA
Seattle
LIS
Lisbon
$534 Roundtrip, just found
$534
Roundtrip
just found
Select Delta flight, departing Wed, Feb 4 from Seattle to Lisbon, returning Thu, Feb 12, priced at $534 just found
Virgin Atlantic
Thu, Nov 27 - Fri, Jan 30
SEA
Seattle
LIS
Lisbon
$555 Roundtrip, found 2 hours ago
$555
Roundtrip
found 2 hours ago
Select Virgin Atlantic flight, departing Thu, Nov 27 from Seattle to Lisbon, returning Fri, Jan 30, priced at $555 found 2 hours ago

Find the cheapest month to fly from Seattle (SEA) to Lisbon (LIS)

February is typically the cheapest month to fly

From $483 - $1,107 per traveler.

Alternative airports near Lisbon

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Humberto Delgado LIS. Cheapest option available. Flights from $557
LIS
Humberto Delgado
Cheapest
Flights from $557

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Humberto Delgado Airport (LIS) cost?
Grab a cheap one-way flight from $337 or cheap return flight from $397 from Seattle - Tacoma Intl. Airport (SEA) to Humberto Delgado Airport (LIS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Humberto Delgado Airport (LIS)?
November is the cheapest month to fly from SEA to LIS. Traveling outside of peak seasons is often the key to finding better deals on flights.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Humberto Delgado Airport (LIS)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll take you from SEA to LIS. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Humberto Delgado Airport (LIS)?
There aren't any daily direct flights available from Seattle - Tacoma Intl. Airport (SEA) to Humberto Delgado Airport (LIS). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from SEA to LIS?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Humberto Delgado Airport (LIS)?
To avoid potential delays on the Seattle - Tacoma Intl. Airport (SEA) to Humberto Delgado Airport (LIS) route, aim to fly before 3 PM. Flights after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Humberto Delgado Airport (LIS) last-minute?
Last-minute fares from SEA to LIS are usually more expensive. To secure the best prices, start looking for flights as soon as possible. That being said, if you can play around with your travel dates, you may land a cheap fare right before your trip.
Is it cheaper to book a SEA to LIS flight and hotel package?
You can save money by booking a SEA to LIS flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've chosen your preferred accommodations and flights, consider adding extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Humberto Delgado Airport (LIS)?
In most cases, you can modify or cancel your SEA to LIS flight. However, additional fees may apply, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you want further information, head to our Customer Service portal.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Humberto Delgado
Airlines serving
Aer Lingus, Air Canada, Air Europa, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$397
Distance
5202 mi

Book with confidence

Seattle to Lisbon Flights

The cheapest times to fly from Seattle to Lisbon

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Lisbon are during the month of November. You can find some of the cheapest flights from Seattle to Lisbon with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Lisbon

Sunday is one of the best days to book for cheap flights from Seattle to Lisbon: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Lisbon

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Lisbon in 2025. You can also book with separate airlines for your outbound and return journeys, from $337 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Lisbon flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Lisbon airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Seattle to Lisbon Flights

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*Available to One Key members.