HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Lisbon

$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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
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.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Lisbon Humberto Delgado are usually found in November or January, booked 27 days in advance, depart on a Monday or Tuesday and return on a Wednesday

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 December 4, 2025.

This Air Canada deal was found by Cheapflights users on 12/4. 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.
Sun 12/78:00 pmSEA - LIS
2 stops29h 20mAir Canada
Fri 1/165:00 amLIS - SEA
2 stops25h 06mAir Canada
Deal found 12/4$494
This KLM deal was found by Cheapflights users on 12/4. 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.
Sun 12/77:20 amSEA - LIS
1 stop17h 35mKLM
Fri 1/165:00 amLIS - SEA
1 stop14h 50mKLM
Deal found 12/4$495
This Air Canada deal was found by Cheapflights users on 12/3. 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.
Wed 12/108:00 pmSEA - LIS
2 stops29h 20mAir Canada
Thu 12/2510:55 amLIS - SEA
2 stops43h 51mAir Canada
Deal found 12/3$498
This Delta deal was found by Cheapflights users on 12/3. 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 12/811:59 pmSEA - LIS
2 stops33h 31mDelta
Thu 12/255:00 amLIS - SEA
1 stop14h 50mDelta
Deal found 12/3$499
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/65:11 pmSEA - LIS
2 stops33h 04mUnited Airlines
Tue 12/1611:20 amLIS - SEA
2 stops43h 08mUnited Airlines
Deal found 12/3$500
This Delta deal was found by Cheapflights users on 12/3. 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 12/77:35 amSEA - LIS
1 stop16h 25mDelta
Wed 12/245:30 amLIS - SEA
1 stop15h 55mDelta
Deal found 12/3$501
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Thu 12/118:10 amSEA - LIS
1 stop18h 05mUnited Airlines
Wed 12/2411:00 amLIS - SEA
1 stop19h 16mUnited Airlines
Deal found 12/3$502
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/108:10 amSEA - LIS
1 stop16h 45mUnited Airlines
Mon 12/1511:20 amLIS - SEA
2 stops21h 30mUnited Airlines
Deal found 12/2$504
This Delta deal was found by Cheapflights users on 12/3. 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 12/96:00 amSEA - LIS
2 stops18h 00mDelta
Wed 12/245:30 amLIS - SEA
1 stop15h 55mDelta
Deal found 12/3$505
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Tue 12/98:10 amSEA - LIS
1 stop18h 05mUnited Airlines
Sun 12/1411:55 amLIS - SEA
1 stop16h 59mUnited Airlines
Deal found 12/2$506
This Air Canada deal was found by Cheapflights users on 12/3. 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 12/810:05 amSEA - LIS
2 stops39h 15mAir Canada
Thu 12/2510:55 amLIS - SEA
2 stops35h 36mAir Canada
Deal found 12/3$507
This Air Canada deal was found by Cheapflights users on 12/2. 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.
Sat 12/68:00 pmSEA - LIS
2 stops29h 20mAir Canada
Tue 12/1611:20 amLIS - SEA
2 stops30h 11mAir Canada
Deal found 12/2$510

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 December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$482
(KAYAK)

One-way from

$270
(Cheapflightsfares)

Popular in

June

Cheapest in

November

Average price

$1,107
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. 20% potential increase in price ($232 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 December 2025
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 December 4, 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

Thu 3/19

7:50 pm-9:55 pm

1 stop19h 05m

Lisbon Humberto Delgado

Thu 3/26

10:40 am-12:30 pm

1 stop32h 50m

$483

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 1/30

6:50 pm-10:25 pm

1 stop19h 35m

Lisbon Humberto Delgado

Tue 2/3

7:40 pm-4:55 pm

1 stop29h 15m

$483

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 3/8

11:59 pm-9:00 am

2 stops26h 01m

Lisbon Humberto Delgado

Thu 3/19

10:00 am-10:22 pm

1 stop19h 22m

$485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 2/23

2:15 pm-3:10 pm

1 stop16h 55m

Lisbon Humberto Delgado

Sun 3/15

5:00 am-12:35 pm

1 stop14h 35m

$485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 3/5

3:05 pm-10:35 am

1 stop35h 30m

Lisbon Humberto Delgado

Mon 3/16

11:25 am-12:35 pm

1 stop32h 10m

$488

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 1/18

8:40 am-8:10 am

2 stops15h 30m

Lisbon Humberto Delgado

Sun 1/25

10:50 am-9:12 pm

3 stops42h 22m

$489

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 2/24

7:10 am-11:20 am

2 stops20h 10m

Lisbon Humberto Delgado

Sun 3/15

5:00 am-12:35 pm

1 stop14h 35m

$490

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 1/8

5:00 am-8:10 am

2 stops19h 10m

Lisbon Humberto Delgado

Thu 1/15

11:20 am-4:01 pm

2 stops36h 41m

$491

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 1/17

11:10 pm-8:00 am

2 stops24h 50m

Lisbon Humberto Delgado

Sat 1/24

11:25 am-11:50 am

1 stop32h 25m

$491

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 3/2

6:05 am-9:00 am

2 stops18h 55m

Lisbon Humberto Delgado

Thu 3/12

5:30 am-10:20 pm

2 stops23h 50m

$491

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 21 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 December.
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
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 November 28, 2025.

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 $356). 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 December 4, 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 December 4, 2025.
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
8,011 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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
8,011 reviews
Delta
7.9
Good
8,011 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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
9,063 reviews
Delta
7.9
Good
8,011 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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
7.0
Good
584 reviews
Delta
7.9
Good
8,011 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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
7,612 reviews
Delta
7.9
Good
8,011 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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
7,559 reviews
Delta
7.9
Good
8,011 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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 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 $355 on this airline. Additional options worth looking into are United Airlines and Lufthansa, starting at $513 and $516 round-trip. Icelandair is currently priced 60% 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 ($322), TAP AIR PORTUGAL ($360), and Air France ($379).

  • 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 $29 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 $356). 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
Fátima
Oeiras
Ericeira
Costa da Caparica
Torres Vedras
Beja
Nazaré
Sesimbra
Colares

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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$357Average$582FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$512Average$919FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$516Average$798FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$528Average$824FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$543Average$1,013FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$554Average$946FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$558Average$1,030FlexibilityNo cancel feeOn-time71%
KLMCheapest$560Average$884FlexibilityNo cancel feeOn-time75%
SWISSCheapest$562Average$940FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$576Average$799FlexibilityNo cancel feeOn-time77%

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.