HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Lisbon

$245+ 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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
Mar 23 — Mar 301
Mon 3/23
Mon 3/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Lisbon with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 February 21, 2026.

This Delta deal was found by Cheapflights users on 2/19. 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.
Tue 4/147:15 am
SEA
-
LIS
2 stops20h 00m
Delta
Tue 4/215:00 am
LIS
-
SEA
1 stop14h 45m
Delta
Deal found 2/19$491
This Delta deal was found by Cheapflights users on 2/18. 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.
Tue 4/147:15 am
SEA
-
LIS
2 stops20h 00m
Delta
Mon 4/275:00 am
LIS
-
SEA
1 stop14h 45m
Delta
Deal found 2/18$492
This Mytrip deal was found by Cheapflights users on 2/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/98:10 am
SEA
-
LIS
2 stops41h 10m
Air Canada
Tue 12/155:00 am
LIS
-
SEA
2 stops21h 26m
Air Canada
Deal found 2/19$493
This Finnair deal was found by Cheapflights users on 2/18. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/218:20 pm
SEA
-
LIS
1 stop18h 40m
Multiple Airlines
Wed 4/296:35 am
LIS
-
SEA
2 stops24h 03m
Multiple Airlines
Deal found 2/18$494
This United Airlines deal was found by Cheapflights users on 2/21. 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 10/2511:50 pm
SEA
-
LIS
2 stops26h 30m
United Airlines
Fri 11/136:10 am
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 2/21$496
This United Airlines deal was found by Cheapflights users on 2/21. 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.
Sat 10/2410:10 pm
SEA
-
LIS
1 stop29h 05m
United Airlines
Sat 11/75:00 am
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 2/21$497
This Delta deal was found by Cheapflights users on 2/19. 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.
Mon 4/201:45 pm
SEA
-
LIS
2 stops20h 05m
Delta
Tue 4/285:35 am
LIS
-
SEA
1 stop20h 03m
Delta
Deal found 2/19$498
This Delta deal was found by Cheapflights users on 2/20. 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.
Sun 4/195:35 pm
SEA
-
LIS
1 stop17h 10m
Delta
Tue 4/285:35 am
LIS
-
SEA
1 stop20h 03m
Delta
Deal found 2/20$499
This FlightHub deal was found by Cheapflights users on 2/21. 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 4/2110:20 am
SEA
-
LIS
2 stops40h 45m
Multiple Airlines
Tue 4/285:55 am
LIS
-
SEA
2 stops23h 58m
Multiple Airlines
Deal found 2/21$500
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/218:20 pm
SEA
-
LIS
1 stop18h 40m
British Airways
Wed 5/63:15 pm
LIS
-
SEA
1 stop28h 20m
British Airways
Deal found 2/20$501
This Orbitz deal was found by Cheapflights users on 2/20. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2110:20 am
SEA
-
LIS
2 stops21h 15m
Multiple Airlines
Wed 5/65:05 am
LIS
-
SEA
2 stops17h 15m
Multiple Airlines
Deal found 2/20$502
This Delta deal was found by Cheapflights users on 2/18. 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.
Tue 3/33:05 pm
SEA
-
LIS
1 stop15h 30m
Delta
Wed 3/115:00 am
LIS
-
SEA
1 stop14h 35m
Delta
Deal found 2/18$503

Find 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 February 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$491
(Delta)

One-way from

$245
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$560
Provider with most accurate pricing for Seattle/Tacoma Intl-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Lisbon Humberto Delgado flights.
Search Deals
From Seattle/Tacoma Intl to Lisbon Humberto Delgado
Search Deals
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 ($271 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 21, 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

Tue 4/21

8:20 pm-11:00 pm

1 stop18h 40m

Lisbon Humberto Delgado

Wed 4/29

6:35 am-10:38 pm

2 stops24h 03m

$494

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 2/25

2:15 pm-5:30 pm

1 stop19h 15m

Lisbon Humberto Delgado

Fri 3/6

5:00 am-11:35 am

1 stop14h 35m

$497

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 3/2

2:10 pm-10:25 pm

1 stop24h 15m

Lisbon Humberto Delgado

Tue 3/17

4:50 pm-12:35 pm

1 stop26h 45m

$497

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/7

7:20 am-8:50 am

2 stops17h 30m

Lisbon Humberto Delgado

Wed 4/15

5:00 am-5:16 pm

2 stops20h 16m

$502

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 3/2

2:00 pm-5:30 pm

2 stops19h 30m

Lisbon Humberto Delgado

Tue 3/17

5:00 am-12:35 pm

1 stop14h 35m

$502

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/14

7:15 am-11:15 am

2 stops20h 00m

Lisbon Humberto Delgado

Tue 4/21

5:00 am-5:16 pm

2 stops20h 16m

$502

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 4/16

1:19 pm-11:25 pm

2 stops26h 06m

Lisbon Humberto Delgado

Sat 4/25

6:35 am-10:38 pm

2 stops24h 03m

$509

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 3/3

8:17 am-8:10 am

2 stops15h 53m

Lisbon Humberto Delgado

Thu 3/12

5:00 am-8:58 pm

2 stops22h 58m

$510

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 4/19

11:05 pm-9:20 am

2 stops26h 15m

Lisbon Humberto Delgado

Tue 4/28

11:25 am-8:53 pm

2 stops41h 28m

$520

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/21

8:20 pm-5:55 pm

1 stop13h 35m

Lisbon Humberto Delgado

Tue 4/28

11:00 am-10:38 pm

2 stops19h 38m

$522

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 23 results
1
2
3

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Lisbon flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 February 20, 2026.

To ensure you get the cheapest price possible for a flight from Seattle to Lisbon, you should look to book at least 81 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 $347). Flying from Seattle to Lisbon in June is currently the most expensive (average of $987). 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.

How much does it cost to fly round-trip from Seattle to Lisbon?

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 February 21, 2026.
Get a feel of what it's like to fly with Delta, United Airlines, and Icelandair 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
8,235 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

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
8,235 reviews
Delta
7.9
Good
8,235 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

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
9,339 reviews
Delta
7.9
Good
8,235 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

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.
Icelandair
7.1
Good
617 reviews
Delta
7.9
Good
8,235 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

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
7,798 reviews
Delta
7.9
Good
8,235 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

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
7,757 reviews
Delta
7.9
Good
8,235 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

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 19h 15m. The distance from Seattle to Lisbon is about 5199 mi.

  • 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 British Airways and Lufthansa, starting at $483 and $484 round-trip. Icelandair is currently priced 56% 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 Icelandair ($284), British Airways ($317), and TAP AIR PORTUGAL ($359).

  • 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 $37 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 $347). Flying from Seattle to Lisbon in June is currently the most expensive (average of $987). 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
Ericeira
Oeiras
Beja
Costa da Caparica
Torres Vedras
Nazaré
Colares
Sesimbra

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 February 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$355Average$517FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$483Average$775FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$484Average$711FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$494Average$881FlexibilityNo cancel feeOn-time69%
Air FranceCheapest$530Average$919FlexibilityNo cancel feeOn-time77%
KLMCheapest$535Average$873FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$543Average$1,042FlexibilityNo cancel feeOn-time67%
DeltaCheapest$554Average$944FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$558Average$1,042FlexibilityNo cancel feeOn-time71%
SWISSCheapest$562Average$1,002FlexibilityNo cancel feeOn-time79%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.