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$270+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
Feb 6 — Feb 131
Fri 2/6
Fri 2/13
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 7, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$483
(United Airlines)

One-way from

$270
(oojo)

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
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Highest demand for flights based on searches. 24% potential increase in price ($280 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($44 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 7, 2026.

This United Airlines deal was found by Cheapflights users on 1/6. 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 3/811:59 pmSEA - LIS
2 stops26h 21mUnited Airlines
Thu 3/1911:55 amLIS - SEA
2 stops40h 19mUnited Airlines
Deal found 1/6$483
This FlightHub deal was found by Cheapflights users on 1/5. 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.
Tue 3/38:00 pmSEA - LIS
2 stops51h 55mMultiple Airlines
Fri 3/135:00 amLIS - SEA
1 stop15h 10mMultiple Airlines
Deal found 1/5$484
This British Airways deal was found by Cheapflights users on 1/6. 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.
Tue 4/211:35 pmSEA - LIS
1 stop18h 00mBritish Airways
Sat 5/97:10 amLIS - SEA
1 stop36h 25mBritish Airways
Deal found 1/6$485
This British Airways deal was found by Cheapflights users on 1/5. 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.
Sun 5/31:35 pmSEA - LIS
1 stop25h 25mBritish Airways
Sun 5/1011:00 amLIS - SEA
1 stop15h 25mBritish Airways
Deal found 1/5$486
This FlightHub deal was found by Cheapflights users on 1/5. 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 2/55:50 amSEA - LIS
2 stops18h 05mMultiple Airlines
Wed 2/256:10 amLIS - SEA
2 stops20h 53mMultiple Airlines
Deal found 1/5$487
This FlightHub deal was found by Cheapflights users on 1/6. 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.
Sat 2/213:40 pmSEA - LIS
2 stops33h 40mMultiple Airlines
Sat 2/286:45 pmLIS - SEA
2 stops36h 45mMultiple Airlines
Deal found 1/6$488
This Air Canada deal was found by Cheapflights users on 1/5. 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.
Mon 2/28:10 amSEA - LIS
1 stop17h 10mAir Canada
Mon 2/95:00 amLIS - SEA
2 stops22h 16mAir Canada
Deal found 1/5$489
This British Airways deal was found by Cheapflights users on 1/6. 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.
Tue 4/2111:16 amSEA - LIS
2 stops19h 14mBritish Airways
Sun 5/1011:00 amLIS - SEA
1 stop15h 25mBritish Airways
Deal found 1/6$490
This KLM deal was found by Cheapflights users on 1/5. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/145:30 pmSEA - LIS
1 stop17h 15mKLM
Tue 4/217:45 pmLIS - SEA
1 stop28h 45mKLM
Deal found 1/5$491
This United Airlines deal was found by Cheapflights users on 1/5. 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.
Mon 2/1611:59 pmSEA - LIS
2 stops24h 11mUnited Airlines
Tue 3/3111:25 amLIS - SEA
2 stops43h 12mUnited Airlines
Deal found 1/5$492
This Delta deal was found by Cheapflights users on 1/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/211:40 pmSEA - LIS
1 stop19h 50mDelta
Sat 2/285:30 amLIS - SEA
1 stop13h 55mDelta
Deal found 1/7$493
This KLM deal was found by Cheapflights users on 1/5. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/53:05 pmSEA - LIS
1 stop24h 05mKLM
Thu 3/1211:25 amLIS - SEA
1 stop32h 10mKLM
Deal found 1/5$494

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 7, 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

Sun 3/22

4:10 pm-1:20 pm

1 stop14h 10m

Lisbon Humberto Delgado

Sun 3/29

5:05 am-12:20 pm

1 stop15h 15m

$488

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 2/19

1:40 pm-11:20 am

1 stop13h 40m

Lisbon Humberto Delgado

Fri 2/27

5:00 am-11:40 am

1 stop14h 40m

$488

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 2/7

7:10 am-8:00 am

1 stop16h 50m

Lisbon Humberto Delgado

Sat 2/14

11:25 am-11:40 am

1 stop32h 15m

$488

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 3/9

12:36 pm-9:20 am

3 stops37h 44m

Lisbon Humberto Delgado

Wed 3/18

6:10 am-2:20 pm

1 stop15h 10m

$490

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 3/6

11:35 am-3:10 pm

2 stops19h 35m

Lisbon Humberto Delgado

Thu 3/19

5:00 am-12:35 pm

1 stop14h 35m

$492

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 2/20

9:00 am-10:15 am

2 stops17h 15m

Lisbon Humberto Delgado

Fri 2/27

6:10 am-1:20 pm

1 stop15h 10m

$492

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 2/17

9:50 am-3:10 pm

2 stops21h 20m

Lisbon Humberto Delgado

Mon 2/23

11:25 am-11:40 am

1 stop32h 15m

$492

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 2/16

11:59 pm-8:10 am

2 stops24h 11m

Lisbon Humberto Delgado

Tue 3/31

11:25 am-10:37 pm

2 stops43h 12m

$492

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 2/5

3:05 pm-6:45 pm

1 stop19h 40m

Lisbon Humberto Delgado

Wed 2/25

11:25 am-11:40 am

1 stop32h 15m

$493

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 3/10

4:00 pm-6:50 pm

1 stop19h 50m

Lisbon Humberto Delgado

Thu 3/19

5:00 am-12:35 pm

1 stop14h 35m

$493

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 19 results
1
2

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
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
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 2, 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 7, 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
8,025 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

Comfort

7.9

Food

7.2

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
8,025 reviews
Delta
7.9
Good
8,025 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

Comfort

7.9

Food

7.2

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
1,519 reviews
Delta
7.9
Good
8,025 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

Comfort

7.9

Food

7.2

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
9,139 reviews
Delta
7.9
Good
8,025 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

Comfort

7.9

Food

7.2

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
7,692 reviews
Delta
7.9
Good
8,025 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

Comfort

7.9

Food

7.2

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
7,657 reviews
Delta
7.9
Good
8,025 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

Comfort

7.9

Food

7.2

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 13h 40m. 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 $355 on this airline. Additional options worth looking into are Lufthansa and British Airways, starting at $495 and $499 round-trip. Icelandair is currently priced 57% 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 $35 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

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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 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$352Average$538FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$494Average$781FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$499Average$811FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$507Average$904FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$543Average$1,009FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$553Average$946FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$558Average$1,042FlexibilityNo cancel feeOn-time71%
KLMCheapest$560Average$888FlexibilityNo cancel feeOn-time75%
SWISSCheapest$562Average$940FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$576Average$870FlexibilityNo cancel feeOn-time77%

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