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$255+ 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Lisbon Humberto Delgado are usually found in January or February, booked 29 days in advance, depart on a Monday or Tuesday and return on a Wednesday

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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$537
(Cheapflightsfares)

One-way from

$255
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$830
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
Search Deals
One-way flight from Seattle/Tacoma Intl to Lisbon Humberto Delgado
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($209 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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 October 16, 2025.

This Delta deal was found by Cheapflights users on 10/16. 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.
Fri 11/147:30 amSEA - LIS
2 stops19h 50mDelta
Fri 11/215:00 amLIS - SEA
1 stop14h 45mDelta
Deal found 10/16$539
This Air France deal was found by Cheapflights users on 10/15. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/251:40 pmSEA - LIS
1 stop13h 40mAir France
Sat 12/65:30 amLIS - SEA
1 stop13h 55mAir France
Deal found 10/15$540
This KAYAK deal was found by Cheapflights users on 10/16. 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.
Fri 11/73:10 pmSEA - LIS
2 stops23h 40mLufthansa
Tue 11/186:10 amLIS - SEA
2 stops35h 21mLufthansa
Deal found 10/16$541
This KAYAK deal was found by Cheapflights users on 10/16. 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.
Thu 11/62:00 pmSEA - LIS
2 stops25h 30mLufthansa
Wed 11/195:00 amLIS - SEA
2 stops22h 16mLufthansa
Deal found 10/16$543
This KAYAK deal was found by Cheapflights users on 10/16. 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.
Thu 11/62:00 pmSEA - LIS
2 stops25h 30mLufthansa
Tue 11/186:10 amLIS - SEA
2 stops35h 21mLufthansa
Deal found 10/16$545
This KLM deal was found by Cheapflights users on 10/15. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/291:40 pmSEA - LIS
1 stop13h 40mAir France
Sat 12/65:30 amLIS - SEA
2 stops19h 30mAir France
Deal found 10/15$546
This KLM deal was found by Cheapflights users on 10/15. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:05 pmSEA - LIS
1 stop17h 05mAir France
Sat 12/65:30 amLIS - SEA
2 stops19h 30mAir France
Deal found 10/15$550
This KAYAK deal was found by Cheapflights users on 10/16. 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.
Sun 11/93:10 pmSEA - LIS
1 stop24h 20mLufthansa
Sat 11/155:00 amLIS - SEA
2 stops40h 20mLufthansa
Deal found 10/16$551
This American Airlines deal was found by Cheapflights users on 10/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/139:44 amSEA - LIS
1 stop15h 21mMultiple Airlines
Sun 12/2111:05 amLIS - SEA
1 stop18h 54mMultiple Airlines
Deal found 10/15$555
This KAYAK deal was found by Cheapflights users on 10/16. 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.
Fri 10/313:00 pmSEA - LIS
1 stop24h 50mLufthansa
Fri 11/75:00 amLIS - SEA
1 stop15h 10mLufthansa
Deal found 10/16$556
This KAYAK deal was found by Cheapflights users on 10/16. 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.
Thu 11/62:00 pmSEA - LIS
2 stops25h 30mLufthansa
Sat 11/155:00 amLIS - SEA
1 stop15h 10mLufthansa
Deal found 10/16$558
This British Airways deal was found by Cheapflights users on 10/15. 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.
Sun 11/236:50 pmSEA - LIS
1 stop31h 00mBritish Airways
Sat 12/67:00 amLIS - SEA
1 stop17h 55mBritish Airways
Deal found 10/15$559

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 October 16, 2025.
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

Sat 11/15

7:30 am-11:20 am

2 stops19h 50m

Lisbon Humberto Delgado

Sun 11/23

5:00 am-11:45 am

1 stop14h 45m

$539

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 11/29

1:40 pm-11:20 am

1 stop13h 40m

Lisbon Humberto Delgado

Sat 12/6

5:30 am-11:25 am

1 stop13h 55m

$540

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 3/14

2:00 pm-9:30 pm

2 stops24h 30m

Lisbon Humberto Delgado

Sat 3/21

7:05 am-10:16 pm

2 stops22h 11m

$544

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 3/15

4:10 pm-3:05 pm

2 stops15h 55m

Lisbon Humberto Delgado

Sat 3/21

2:10 pm-2:20 pm

1 stop31h 10m

$544

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 2/13

3:51 pm-8:55 am

2 stops33h 04m

Lisbon Humberto Delgado

Sun 2/22

10:50 am-10:16 pm

1 stop19h 26m

$552

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 11/25

12:40 pm-5:30 pm

2 stops20h 50m

Lisbon Humberto Delgado

Sat 12/6

5:30 am-6:43 pm

2 stops21h 13m

$555

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 10/31

3:00 pm-10:50 pm

1 stop24h 50m

Lisbon Humberto Delgado

Thu 11/6

5:00 am-12:10 pm

1 stop15h 10m

$556

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 11/23

6:50 pm-9:50 am

1 stop31h 00m

Lisbon Humberto Delgado

Sat 12/6

7:00 am-4:55 pm

1 stop17h 55m

$559

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 10/29

7:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Mon 11/10

5:00 am-12:10 pm

1 stop15h 10m

$585

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 10/30

3:00 pm-10:50 pm

1 stop24h 50m

Lisbon Humberto Delgado

Fri 11/7

5:00 am-7:16 pm

2 stops22h 16m

$596

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/16

Showing 1-10 of 22 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
CheapfaremartPrice 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 October 10, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Lisbon, you should look to book at least 29 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 $1,018). 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.

What is the cheapest time of day to fly from SEA to LIS?

Find hourly flight availability from Seattle to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 16, 2025.

When flying from Seattle to Lisbon, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 10% versus a flight at noon.

What is the cheapest day to fly from Seattle to Lisbon?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Lisbon. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Lisbon flight should consider departing on Monday afternoons when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 16, 2025.
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
7,981 reviews

Boarding

8.2

Food

7.3

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,981 reviews
Delta
7.9
Good
7,981 reviews

Boarding

8.2

Food

7.3

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air France
7.4
Good
1,476 reviews
Delta
7.9
Good
7,981 reviews

Boarding

8.2

Food

7.3

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,982 reviews
Delta
7.9
Good
7,981 reviews

Boarding

8.2

Food

7.3

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Icelandair
7.0
Good
556 reviews
Delta
7.9
Good
7,981 reviews

Boarding

8.2

Food

7.3

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
British Airways
6.7
Okay
7,457 reviews
Delta
7.9
Good
7,981 reviews

Boarding

8.2

Food

7.3

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 15h 55m. 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 $375 on this airline. Additional options worth looking into are Lufthansa and Air Canada, starting at $530 and $543 round-trip. Icelandair is currently priced 59% below the average price you’ll pay for this route.

  • 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 $36 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 $1,018). 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
Sintra
Fátima
Oeiras
Nazaré
Ericeira
Costa da Caparica
Torres Vedras
Beja
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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$375Average$607FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$530Average$824FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$543Average$1,032FlexibilityNo cancel feeOn-time67%
British AirwaysCheapest$560Average$848FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$560Average$987FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$565Average$949FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$627Average$1,033FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$627Average$925FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$632Average$881FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$654Average$740FlexibilityNo cancel feeOn-time77%

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