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$336+ 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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Lisbon Humberto Delgado are usually found in February or January, booked 15 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 January 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$705
(United Airlines)

One-way from

$336
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$771
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. 19% potential increase in price ($245 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in January 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 January 30, 2025.

This United Airlines deal was found by Cheapflights users on 1/28. 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 4/2212:46 pmSEA - LIS
2 stops36h 34mUnited Airlines
Tue 5/611:25 amLIS - SEA
2 stops39h 27mUnited Airlines
Deal found 1/28$705
This Booking.com deal was found by Cheapflights users on 1/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/297:20 amSEA - LIS
1 stop18h 00mAir Canada
Thu 10/235:05 amLIS - SEA
2 stops21h 31mAir Canada
Deal found 1/28$706
This Delta deal was found by Cheapflights users on 1/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/97:15 amSEA - LIS
2 stops20h 20mDelta
Mon 3/175:00 amLIS - SEA
1 stop14h 40mDelta
Deal found 1/29$707
This Gurufare deal was found by Cheapflights users on 1/29. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:50 pmSEA - LIS
1 stop19h 00mLufthansa
Fri 11/146:10 amLIS - SEA
1 stop15h 10mLufthansa
Deal found 1/29$710
This Travelocity deal was found by Cheapflights users on 1/29. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/135:45 amSEA - LIS
2 stops19h 35mMultiple Airlines
Mon 4/215:05 amLIS - SEA
1 stop15h 20mMultiple Airlines
Deal found 1/29$718
This oojo deal was found by Cheapflights users on 1/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/237:00 pmSEA - LIS
1 stop31h 05mTurkish Airlines
Wed 3/54:00 pmLIS - SEA
1 stop33h 05mTurkish Airlines
Deal found 1/29$729
This Orbitz deal was found by Cheapflights users on 1/28. 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.
Sat 4/198:20 pmSEA - LIS
1 stop29h 45mBritish Airways
Sat 4/266:55 pmLIS - SEA
1 stop24h 35mBritish Airways
Deal found 1/28$741
This Ovago deal was found by Cheapflights users on 1/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/97:25 amSEA - LIS
2 stops28h 55mIcelandair
Mon 2/179:20 pmLIS - SEA
1 stop27h 40mIcelandair
Deal found 1/29$744
This Booking.com deal was found by Cheapflights users on 1/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/106:45 pmSEA - LIS
1 stop18h 50mAer Lingus
Wed 5/2110:15 pmLIS - SEA
1 stop26h 44mAer Lingus
Deal found 1/29$886

Find flights from Seattle to Lisbon within your budget

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 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/22

12:46 pm-9:20 am

2 stops36h 34m

Lisbon Humberto Delgado

Tue 5/6

11:25 am-6:52 pm

2 stops39h 27m

$705

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 4/27

7:05 pm-9:20 am

2 stops30h 15m

Lisbon Humberto Delgado

Tue 5/6

5:05 am-2:13 pm

2 stops17h 08m

$706

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 3/9

7:15 am-10:35 am

2 stops20h 20m

Lisbon Humberto Delgado

Mon 3/17

5:00 am-12:40 pm

1 stop14h 40m

$707

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 3/1

2:00 pm-3:05 pm

1 stop17h 05m

Lisbon Humberto Delgado

Fri 3/14

6:10 am-2:20 pm

1 stop15h 10m

$712

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 4/23

5:45 am-9:20 am

2 stops19h 35m

Lisbon Humberto Delgado

Wed 4/30

6:15 am-4:59 pm

1 stop18h 44m

$717

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 2/23

7:00 pm-10:05 am

1 stop31h 05m

Lisbon Humberto Delgado

Wed 3/5

4:00 pm-5:05 pm

1 stop33h 05m

$729

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 4/19

8:20 pm-10:05 am

1 stop29h 45m

Lisbon Humberto Delgado

Sat 4/26

6:55 pm-11:30 am

1 stop24h 35m

$741

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 2/9

7:25 am-8:20 pm

2 stops28h 55m

Lisbon Humberto Delgado

Mon 2/17

9:20 pm-5:00 pm

1 stop27h 40m

$744

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 5/10

6:45 pm-9:35 pm

1 stop18h 50m

Lisbon Humberto Delgado

Wed 5/21

10:15 pm-4:59 pm

1 stop26h 44m

$886

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 3/25

9:48 am-12:00 pm

2 stops43h 12m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 19 results
1
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapOairPrice Accuracy1 starTrust Score*3 stars

*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.

Travel insights for flights from Seattle to Lisbon

Get recent, data-driven insights about flights from Seattle to Lisbon including ideal travel times, pricing trends, and more.

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 24, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Lisbon, you should look to book at least 15 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 $612). 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.

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 January 30, 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 11% 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.

Rainfall in Lisbon by month

Plan your trip to Lisbon by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Lisbon ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Lisbon when rainfall is around 0.2 in.

Temperature in Lisbon by month

Plan your trip to Lisbon by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Lisbon, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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 30, 2025.
Peruse reviews from past customers who have flown with Delta, Air France and United Airlines from Seattle to Lisbon to help guide your decision. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,456 reviews

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,456 reviews
Delta
8.0
Very good
8,456 reviews

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air France
7.4
Good
1,476 reviews
Delta
8.0
Very good
8,456 reviews

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines
7.4
Good
8,913 reviews
Delta
8.0
Very good
8,456 reviews

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Turkish Airlines
7.3
Good
3,904 reviews
Delta
8.0
Very good
8,456 reviews

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Aer Lingus
7.1
Good
1,077 reviews
Delta
8.0
Very good
8,456 reviews

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines flying from Seattle to Lisbon round-trip?

    Our cheapest airline available from Seattle to Lisbon is United Airlines. Our recent data shows that you can find tickets from as low as $705 on this airline. Additional options worth looking into are Air Canada and Delta, starting at $706 and $707 round-trip. United Airlines is currently priced 31% 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 TAP AIR PORTUGAL ($401), Air Canada ($464), and United Airlines ($472).

  • 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. Toronto follows Paris in terms of the most frequent layover location on Seattle to Lisbon flights.

  • 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, Piccadilly Circus, and Buckingham Palace. Travelers on a layover in London can visit Hyde Park, Piccadilly Circus, and Buckingham Palace, by traveling 12.5 mi, 14.1 mi, and 13.7 mi, respectively after landing at London Heathrow. Travelers can rent a car at London Heathrow for an average daily rate of $37 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 Place Vendôme 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 Place Vendôme can do so by traveling 15.8 mi, 14.7 mi, and 14.2 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 $36 per day.

  • What are points of interest worth seeing during a layover in Toronto?

    Union Station, CN Tower, and Hockey Hall of Fame are the most popular attractions in Toronto if you're in need of something to do during your layover. Those on a layover in Toronto interested in visiting Union Station, CN Tower, or Hockey Hall of Fame can do so by traveling 12.1 mi, 11.9 mi, and 12.3 mi, respectively from Toronto Pearson Intl. Those on a layover in Toronto in need of a rental car can book one at Toronto Pearson Intl for about $27.

  • Where are the least popular layover locations for Seattle to Lisbon flights?

    Seattle to Lisbon flights have a layover in Frankfurt am Main the least frequently. Seattle to Lisbon flights stopping in Dublin are the next rarest. Amsterdam comes next as the third least popular layover location for Seattle to Lisbon flights.

  • 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 $612). 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 Seattle?

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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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$543Average$700FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$612Average$954FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$621Average$1,021FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$632Average$993FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$635Average$1,036FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$652Average$821FlexibilityNo cancel feeOn-time77%
DeltaCheapest$700Average$1,075FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$700Average$1,083FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$701Average$1,047FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$702Average$1,081FlexibilityNo cancel feeOn-time69%
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