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$374+ 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 3/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
Mar 4 — Mar 111
Tue 3/4
Tue 3/11
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Lisbon Humberto Delgado are usually found in January or February, booked 67 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 February 27, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$705
(Delta)

One-way from

$374
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$775
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. 16% potential increase in price ($204 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 27, 2025.

This Delta deal was found by Cheapflights users on 2/26. 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 3/186:00 amSEA - LIS
2 stops21h 35mDelta
Fri 3/2810:00 amLIS - SEA
1 stop19h 25mDelta
Deal found 2/26$705
This Expedia deal was found by Cheapflights users on 2/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/121:25 pmSEA - LIS
2 stops25h 25mBritish Airways
Tue 3/1810:40 amLIS - SEA
1 stop14h 15mBritish Airways
Deal found 2/26$708
This Ovago deal was found by Cheapflights users on 2/26. 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 10/54:20 pmSEA - LIS
1 stop20h 20mMultiple Airlines
Wed 10/227:15 amLIS - SEA
1 stop14h 45mMultiple Airlines
Deal found 2/26$711
This oojo deal was found by Cheapflights users on 2/27. 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.
Tue 4/227:10 pmSEA - LIS
1 stop36h 15mTurkish Airlines
Tue 4/294:30 pmLIS - SEA
1 stop32h 45mTurkish Airlines
Deal found 2/27$726
This Finnair deal was found by Cheapflights users on 2/26. 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.
Wed 12/37:42 amSEA - LIS
2 stops20h 28mFinnair
Mon 12/224:10 pmLIS - SEA
2 stops34h 50mFinnair
Deal found 2/26$731
This American Airlines deal was found by Cheapflights users on 2/25. 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.
Tue 2/2510:21 pmSEA - LIS
2 stops26h 34mAmerican Airlines
Mon 3/311:05 amLIS - SEA
1 stop19h 04mAmerican Airlines
Deal found 2/25$744
This Air France deal was found by Cheapflights users on 2/27. 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.
Sat 10/251:30 pmSEA - LIS
1 stop21h 00mAir France
Sat 11/15:30 amLIS - SEA
1 stop13h 50mAir France
Deal found 2/27$753
This Gotogate deal was found by Cheapflights users on 2/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/226:00 amSEA - LIS
1 stop21h 10mAir Canada
Tue 4/2911:25 amLIS - SEA
2 stops39h 03mAir Canada
Deal found 2/26$759
This Iberia deal was found by Cheapflights users on 2/26. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/242:09 pmSEA - LIS
2 stops17h 56mIberia
Fri 11/1412:30 pmLIS - SEA
2 stops20h 23mIberia
Deal found 2/26$776
This FlightHub deal was found by Cheapflights users on 2/26. 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.
Sun 8/174:00 pmSEA - LIS
1 stop19h 25mScandinavian Airlines
Sun 8/248:15 pmLIS - SEA
1 stop25h 35mScandinavian Airlines
Deal found 2/26$784
This Cheapflightsfares deal was found by Cheapflights users on 2/25. 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.
Wed 4/166:50 pmSEA - LIS
1 stop19h 00mLufthansa
Wed 4/305:05 amLIS - SEA
2 stops19h 54mLufthansa
Deal found 2/25$803
This KLM deal was found by Cheapflights users on 2/27. 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.
Tue 4/157:18 amSEA - LIS
1 stop16h 42mKLM
Wed 4/307:30 pmLIS - SEA
1 stop28h 20mKLM
Deal found 2/27$804

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 February 27, 2025.

Fly from

Seattle

Fly to

Lisbon

Route

Depart

Return

Price

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 3/18

6:00 am-10:35 am

2 stops21h 35m

Lisbon Humberto Delgado

Fri 3/28

10:00 am-10:25 pm

1 stop19h 25m

$705

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 3/12

1:25 pm-9:50 pm

2 stops25h 25m

Lisbon Humberto Delgado

Tue 3/18

10:40 am-5:55 pm

1 stop14h 15m

$708

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 3/26

7:50 pm-9:50 pm

1 stop19h 00m

Lisbon Humberto Delgado

Mon 4/7

12:30 pm-12:51 am

2 stops20h 21m

$712

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/22

7:10 pm-3:25 pm

1 stop36h 15m

Lisbon Humberto Delgado

Tue 4/29

4:30 pm-5:15 pm

1 stop32h 45m

$726

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 3/2

8:25 am-8:55 am

2 stops16h 30m

Lisbon Humberto Delgado

Sun 3/9

11:05 am-12:48 am

2 stops20h 43m

$744

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 3/10

7:50 pm-11:25 pm

2 stops20h 35m

Lisbon Humberto Delgado

Mon 3/17

6:45 pm-10:59 pm

2 stops35h 14m

$758

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/22

6:00 am-11:10 am

1 stop21h 10m

Lisbon Humberto Delgado

Tue 4/29

11:25 am-6:28 pm

2 stops39h 03m

$759

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 3/25

7:15 am-3:10 pm

2 stops24h 55m

Lisbon Humberto Delgado

Sun 4/6

12:10 pm-9:27 pm

2 stops41h 17m

$780

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 4/16

6:50 pm-9:50 pm

1 stop19h 00m

Lisbon Humberto Delgado

Wed 4/30

5:05 am-4:59 pm

2 stops19h 54m

$803

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/15

7:18 am-8:00 am

1 stop16h 42m

Lisbon Humberto Delgado

Wed 4/30

7:30 pm-3:50 pm

1 stop28h 20m

$804

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/26

Showing 1-10 of 24 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 February.
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 February 25, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Lisbon, you should look to book at least 67 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 $1,230). 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 February 27, 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 February 27, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and SWISS 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
8,140 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

8.0

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
8,140 reviews
Delta
8.0
Very good
8,140 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

8.0

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.

KLM
7.8
Good
1,331 reviews
Delta
8.0
Very good
8,140 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

8.0

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.

SWISS
7.5
Good
1,569 reviews
Delta
8.0
Very good
8,140 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

8.0

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
1,444 reviews
Delta
8.0
Very good
8,140 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

8.0

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
8,723 reviews
Delta
8.0
Very good
8,140 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

8.0

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 Delta. Our recent data shows that you can find tickets from as low as $705 on this airline. Additional options worth looking into are British Airways and Turkish Airlines, starting at $708 and $726 round-trip. Delta is currently priced 29% 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 American Airlines ($621), Aer Lingus ($635), and Lufthansa ($690).

  • 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 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 $39 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 $26.

  • 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 $1,230). 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 February 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$543Average$680FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$606Average$966FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$616Average$972FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$622Average$908FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$632Average$986FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$652Average$844FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$691Average$1,061FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$700Average$1,083FlexibilityNo cancel feeOn-time77%
DeltaCheapest$700Average$1,075FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$714Average$1,087FlexibilityNo cancel feeOn-time69%
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