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$266+ Cheap flights from Seattle (SEA) to Lisbon (LIS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
Feb 14 — Feb 211
Sat 2/14
Sat 2/21
1 adult, Economy
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Cheap flight deals from Seattle to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Lisbon (LIS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 15, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$483
(Delta)

One-way from

$266
(Cheapflightsfares)

Popular in

June

Cheapest in

January

Average price

$504
Provider with most accurate pricing for Seattle/Tacoma Intl-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Lisbon Humberto Delgado flights.
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From Seattle/Tacoma Intl to Lisbon Humberto Delgado
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One-way flight from Seattle/Tacoma Intl to Lisbon Humberto Delgado
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($280 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Seattle to Lisbon

Cheapest flights from Seattle to Lisbon
Explore the most affordable flight options available from Seattle to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 15, 2026.

This oojo deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/232:05 pm
SEA
-
LIS
2 stops25h 00m
British Airways
Mon 4/276:45 pm
LIS
-
SEA
2 stops35h 41m
British Airways
Deal found 1/14$483
This Air Canada deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:00 pm
SEA
-
LIS
2 stops55h 00m
Air Canada
Mon 4/201:00 pm
LIS
-
SEA
1 stop16h 51m
Air Canada
Deal found 1/15$484
This British Airways deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1111:10 pm
SEA
-
LIS
2 stops39h 55m
British Airways
Sun 4/196:50 pm
LIS
-
SEA
1 stop24h 45m
British Airways
Deal found 1/15$485
This Ovago deal was found by Cheapflights users on 1/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/116:12 am
SEA
-
LIS
2 stops21h 58m
British Airways
Wed 2/1812:55 pm
LIS
-
SEA
1 stop36h 00m
British Airways
Deal found 1/13$486
This United Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/2211:59 pm
SEA
-
LIS
2 stops24h 11m
United Airlines
Sun 3/111:55 am
LIS
-
SEA
2 stops29h 54m
United Airlines
Deal found 1/15$487
This United Airlines deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/224:10 pm
SEA
-
LIS
1 stop24h 20m
United Airlines
Thu 4/25:05 am
LIS
-
SEA
1 stop15h 15m
United Airlines
Deal found 1/14$488
This British Airways deal was found by Cheapflights users on 1/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1511:16 am
SEA
-
LIS
2 stops18h 54m
British Airways
Sun 4/195:10 pm
LIS
-
SEA
1 stop33h 15m
British Airways
Deal found 1/13$489
This FlightHub deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/92:10 pm
SEA
-
LIS
1 stop24h 05m
Lufthansa
Fri 4/176:15 am
LIS
-
SEA
1 stop18h 44m
Lufthansa
Deal found 1/15$491
This United Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/307:00 am
SEA
-
LIS
2 stops17h 10m
United Airlines
Thu 2/511:20 am
LIS
-
SEA
3 stops43h 23m
United Airlines
Deal found 1/15$492
This Gotogate deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/233:00 pm
SEA
-
LIS
1 stop16h 50m
Lufthansa
Thu 4/25:05 am
LIS
-
SEA
1 stop15h 15m
Lufthansa
Deal found 1/14$493
This United Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/218:40 am
SEA
-
LIS
2 stops15h 30m
United Airlines
Thu 1/295:00 am
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 1/15$494
This KAYAK deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/199:55 am
SEA
-
LIS
2 stops39h 25m
Lufthansa
Fri 1/306:10 am
LIS
-
SEA
1 stop15h 10m
Lufthansa
Deal found 1/15$495

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Lisbon that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 15, 2026.
Use the filters below to find and compare flights from Seattle to Lisbon that are best for you.

Fly from

Seattle

Fly to

Lisbon

Route

Depart

Return

Price

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 4/10

8:00 pm-11:00 am

2 stops55h 00m

Lisbon Humberto Delgado

Tue 4/21

1:00 pm-9:51 pm

1 stop16h 51m

$484

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 3/23

7:00 am-11:30 pm

2 stops33h 30m

Lisbon Humberto Delgado

Thu 4/2

5:05 am-12:20 pm

1 stop15h 15m

$484

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 4/11

11:10 pm-11:05 pm

2 stops39h 55m

Lisbon Humberto Delgado

Thu 4/23

6:45 pm-11:35 am

1 stop24h 50m

$485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 2/11

3:05 pm-6:30 pm

1 stop19h 25m

Lisbon Humberto Delgado

Wed 2/18

5:30 am-1:20 pm

1 stop15h 50m

$485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 4/12

8:20 pm-11:05 pm

1 stop18h 45m

Lisbon Humberto Delgado

Sat 4/18

6:55 pm-11:35 am

1 stop24h 40m

$485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/14

8:20 pm-5:55 pm

1 stop13h 35m

Lisbon Humberto Delgado

Sun 4/19

6:50 pm-11:35 am

1 stop24h 45m

$485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 4/11

11:10 pm-11:05 pm

2 stops39h 55m

Lisbon Humberto Delgado

Wed 4/22

11:00 am-6:25 pm

1 stop15h 25m

$485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 3/22

4:10 pm-11:30 pm

1 stop24h 20m

Lisbon Humberto Delgado

Thu 4/2

5:05 am-12:20 pm

1 stop15h 15m

$488

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 2/9

12:35 pm-2:35 pm

2 stops42h 00m

Lisbon Humberto Delgado

Mon 2/23

3:25 pm-10:43 pm

2 stops39h 18m

$492

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 2/21

7:30 am-8:00 am

1 stop16h 30m

Lisbon Humberto Delgado

Sat 2/28

5:30 am-11:25 am

1 stop13h 55m

$494

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Showing 1-10 of 21 results
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Compare providers for flights from Seattle to Lisbon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Lisbon in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Lisbon flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Lisbon flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Lisbon flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Lisbon flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Lisbon flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Lisbon

How far ahead should I book a flight from Seattle to Lisbon?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Lisbon. Price data was last updated on January 9, 2026.

To ensure you get the cheapest price possible for a flight from Seattle to Lisbon, you should look to book at least 27 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Seattle to Lisbon?

Currently, January is the cheapest month in which you can book a flight from Seattle to Lisbon (average of $348). Flying from Seattle to Lisbon in June is currently the most expensive (average of $1,030). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Lisbon. Reviews last updated January 15, 2026.
Get a feel of what it's like to fly with Delta, Air France, and United Airlines from Seattle to Lisbon by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,049 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,049 reviews
Delta
7.9
Good
8,049 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air France
7.4
Good
1,522 reviews
Delta
7.9
Good
8,049 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,163 reviews
Delta
7.9
Good
8,049 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Lufthansa
6.8
Okay
7,715 reviews
Delta
7.9
Good
8,049 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,676 reviews
Delta
7.9
Good
8,049 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Lisbon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Lisbon?

    Departing from Seattle to Lisbon will take you 33h 30m. The distance from Seattle to Lisbon is about 5199 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seattle to Lisbon round-trip?

    Our cheapest airline available from Seattle to Lisbon is Icelandair. Our recent data shows that you can find tickets from as low as $348 on this airline. Additional options worth looking into are Lufthansa and British Airways, starting at $495 and $499 round-trip. Icelandair is currently priced 58% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Seattle to Lisbon one-way?

    The cheapest airlines for a one-way flight from Seattle to Lisbon are British Airways ($317), Icelandair ($322), and TAP AIR PORTUGAL ($360).

  • Where are the most common layover locations when flying from Seattle to Lisbon?

    Seattle to Lisbon flights have a layover in London most often. Paris sees the second most layovers for non-direct flights flying from Seattle to Lisbon.

  • What are some popular things to do or see while on a layover in London?

    The majority of London visitors spend their time at Hyde Park, Buckingham Palace, and Piccadilly Circus. Travelers on a layover in London can visit Hyde Park, Buckingham Palace, and Piccadilly Circus, by traveling 12.5 mi, 13.7 mi, and 14.1 mi, respectively after landing at London Heathrow. Travelers can rent a car at London Heathrow for an average daily rate of $33 to make sightseeing during their layover a little easier.

  • What are some popular points of interest to see during a layover in Paris?

    Eiffel Tower, Champs-Elysées, and Louvre Museum are currently the most popular points of interest in Paris at the moment. Those on a layover in Paris interested in visiting Eiffel Tower, Champs-Elysées, or Louvre Museum can do so by traveling 15.8 mi, 14.7 mi, and 14.3 mi, respectively from Paris Charles de Gaulle. Those landing in Paris looking to spend some time exploring during their layover can rent a car for about $40 per day.

  • Where are the least popular layover locations for Seattle to Lisbon flights?

    Seattle to Lisbon flights have a layover in Toronto the least frequently.

  • Can I find deals for flights from Seattle to Lisbon that include hotel bookings?

    Yes. In addition to deals on Seattle to Lisbon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Lisbon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Lisbon.

  • Can I find deals for business class flights from Seattle to Lisbon?

    Yes. Cheapflights offers flight deals from Seattle to Lisbon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Lisbon?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Lisbon (average of $348). Flying from Seattle to Lisbon in June is currently the most expensive (average of $1,030). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Fátima
Oeiras
Ericeira
Beja
Costa da Caparica
Torres Vedras
Nazaré
Sesimbra
Colares

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Seattle to Lisbon

Discover the top 10 airlines that operate flights from Seattle to Lisbon. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$348Average$536FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$495Average$779FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$499Average$812FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$508Average$898FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$543Average$1,001FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$551Average$940FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$558Average$1,042FlexibilityNo cancel feeOn-time71%
KLMCheapest$560Average$883FlexibilityNo cancel feeOn-time75%
SWISSCheapest$562Average$940FlexibilityNo cancel feeOn-time79%
Aer LingusCheapest$568Average$901FlexibilityNo cancel feeOn-timeN/A

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