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$243+ 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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
Jul 31 — Aug 71
Fri 7/31
Fri 8/7
1 adult, Economy
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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 July 1, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/83:55 pm
SEA
-
LIS
1 stop23h 20m
Scandinavian Airlines
Sat 9/1910:55 pm
LIS
-
SEA
1 stop22h 50m
Scandinavian Airlines
Deal found 6/30$596
This Cheapflightsfares deal was found by Cheapflights users on 7/1. 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.
Fri 9/113:55 pm
SEA
-
LIS
1 stop22h 10m
Scandinavian Airlines
Sat 9/1910:55 pm
LIS
-
SEA
1 stop22h 50m
Scandinavian Airlines
Deal found 7/1$611
This Mytrip deal was found by Cheapflights users on 6/30. 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.
Sat 8/157:35 pm
SEA
-
LIS
2 stops17h 20m
WestJet
Thu 8/276:10 am
LIS
-
SEA
2 stops22h 50m
WestJet
Deal found 6/30$667
This Kiwi.com deal was found by Cheapflights users on 6/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:10 pm
SEA
-
LIS
1 stop29h 50m
Multiple Airlines
Thu 8/276:10 am
LIS
-
SEA
2 stops22h 50m
Multiple Airlines
Deal found 6/29$685
This AirNGo deal was found by Cheapflights users on 6/30. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:55 pm
SEA
-
LIS
1 stop22h 10m
Scandinavian Airlines
Sat 9/510:55 pm
LIS
-
SEA
1 stop22h 50m
Scandinavian Airlines
Deal found 6/30$698
This Kiwi.com deal was found by Cheapflights users on 6/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:10 pm
SEA
-
LIS
1 stop29h 50m
Multiple Airlines
Tue 8/256:15 am
LIS
-
SEA
2 stops35h 25m
Multiple Airlines
Deal found 6/29$710

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 July 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$596
(Kiwi.com)

One-way from

$243
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,168
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. 28% potential increase in price ($335 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 July 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 July 1, 2026.
Use the filters below to find and compare flights from Seattle to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 9/11

9:00 am-10:05 pm

2 stops29h 05m

Lisbon Humberto Delgado

Sat 9/19

10:55 pm-1:45 pm

1 stop22h 50m

$793

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 9/26

11:14 pm-10:30 am

1 stop27h 16m

Lisbon Humberto Delgado

Thu 12/24

5:00 am-12:00 pm

1 stop15h 00m

$825

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 9/19

3:55 pm-10:00 pm

2 stops22h 05m

Lisbon Humberto Delgado

Sat 10/3

10:55 pm-1:45 pm

1 stop22h 50m

$875
Quickest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 9/26

10:58 pm-8:20 am

1 stop25h 22m

Lisbon Humberto Delgado

Sat 12/26

5:00 am-12:00 pm

1 stop15h 00m

$933

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 9/8

7:15 pm-3:35 pm

1 stop36h 20m

Lisbon Humberto Delgado

Tue 9/29

5:55 am-5:20 pm

1 stop19h 25m

$941

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 9/15

6:45 pm-5:50 pm

1 stop15h 05m

Lisbon Humberto Delgado

Mon 9/21

11:55 am-4:35 pm

1 stop36h 40m

$973

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 8/12

6:40 pm-5:50 pm

1 stop15h 10m

Lisbon Humberto Delgado

Mon 8/24

11:55 am-11:37 am

1 stop31h 42m

$973

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 9/12

11:08 pm-10:45 am

1 stop27h 37m

Lisbon Humberto Delgado

Mon 9/21

11:55 am-4:35 pm

1 stop36h 40m

$986

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 8/22

10:58 pm-9:20 am

2 stops26h 22m

Lisbon Humberto Delgado

Mon 8/31

7:25 am-11:55 am

1 stop36h 30m

$996

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 9/6

7:15 pm-9:55 am

1 stop30h 40m

Lisbon Humberto Delgado

Sun 9/13

10:50 am-5:20 pm

1 stop38h 30m

$1,001

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/26

Showing 1-10 of 16 resultsSorted by cheapest first
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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 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?

To ensure you get the cheapest price possible for a flight from Seattle to Lisbon, you should look to book at least 80 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 $482). Flying from Seattle to Lisbon in June is currently the most expensive (average of $1,244). 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 July 1, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andIcelandair 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
7.8
Good
8,454 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Boarding

8.1

Comfort

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,454 reviews
Delta
7.8
Good
8,454 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Boarding

8.1

Comfort

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,908 reviews
Delta
7.8
Good
8,454 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Boarding

8.1

Comfort

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Icelandair
7.0
Good
694 reviews
Delta
7.8
Good
8,454 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Boarding

8.1

Comfort

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Lufthansa
6.8
Okay
8,109 reviews
Delta
7.8
Good
8,454 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Boarding

8.1

Comfort

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
British Airways
6.7
Okay
8,089 reviews
Delta
7.8
Good
8,454 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Boarding

8.1

Comfort

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 29h 05m. 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 $475 and $482 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 Icelandair ($273), United Airlines ($282), and British Airways ($289).

  • 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 Trafalgar Square. Travelers on a layover in London can visit Hyde Park, Buckingham Palace, and Trafalgar Square, by traveling 12.5 mi, 13.7 mi, and 14.3 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 $38 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 $482). Flying from Seattle to Lisbon in June is currently the most expensive (average of $1,244). 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
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 July 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$348Average$434FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$475Average$693FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$482Average$759FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$488Average$873FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$497Average$1,042FlexibilityNo cancel feeOn-time71%
KLMCheapest$503Average$980FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$504Average$839FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$535Average$865FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$543Average$1,081FlexibilityNo cancel feeOn-time67%
DeltaCheapest$550Average$1,005FlexibilityNo cancel feeOn-timeN/A

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