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$291+ 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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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 17 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 junio 12, 2025.

Round-trip from

$689
(Delta)

One-way from

$291
(Trip.com)

Popular in

June

Cheapest in

January

Average price

$1,368
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. 17% potential increase in price ($207 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/12. 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.
jue. 10/305:05 amSEA - LIS
2 stops20h 05mUnited Airlines
sáb. 11/811:00 amLIS - SEA
2 stops21h 59mUnited Airlines
Deal found 6/12$548
This American Airlines deal was found by Cheapflights users on 6/12. 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.
vie. 10/249:45 amSEA - LIS
1 stop15h 20mMultiple Airlines
vie. 11/147:05 amLIS - SEA
1 stop17h 50mMultiple Airlines
Deal found 6/12$561
This Air France deal was found by Cheapflights users on 6/12. 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.
mié. 10/227:20 amSEA - LIS
1 stop16h 40mAir France
dom. 11/911:15 amLIS - SEA
1 stop18h 58mAir France
Deal found 6/12$571
This CheapOair deal was found by Cheapflights users on 6/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/307:50 pmSEA - LIS
1 stop19h 05mBritish Airways
sáb. 11/810:30 amLIS - SEA
1 stop19h 19mBritish Airways
Deal found 6/12$572
This Delta deal was found by Cheapflights users on 6/12. 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.
vie. 10/246:05 amSEA - LIS
2 stops21h 10mDelta
vie. 11/145:30 amLIS - SEA
1 stop15h 45mDelta
Deal found 6/12$594
This FlightHub deal was found by Cheapflights users on 6/12. 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.
vie. 10/247:30 amSEA - LIS
2 stops16h 50mAir Canada
vie. 11/146:10 amLIS - SEA
2 stops20h 16mAir Canada
Deal found 6/12$629
This American Airlines deal was found by Cheapflights users on 6/12. 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.
lun. 10/138:20 pmSEA - LIS
1 stop18h 50mAmerican Airlines
mar. 10/2811:10 amLIS - SEA
1 stop17h 34mAmerican Airlines
Deal found 6/12$653
This FlightHub deal was found by Cheapflights users on 6/12. 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.
mar. 9/27:10 pmSEA - LIS
1 stop30h 45mTurkish Airlines
mar. 9/165:55 amLIS - SEA
1 stop19h 20mTurkish Airlines
Deal found 6/12$675
This Lufthansa deal was found by Cheapflights users on 6/11. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/242:20 pmSEA - LIS
1 stop23h 45mLufthansa
jue. 10/3011:00 amLIS - SEA
2 stops34h 26mLufthansa
Deal found 6/11$700
This Booking.com deal was found by Cheapflights users on 6/11. 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.
vie. 8/157:35 pmSEA - LIS
1 stop18h 00mAer Lingus
vie. 8/2210:15 pmLIS - SEA
1 stop27h 35mAer Lingus
Deal found 6/11$703
This SWISS deal was found by Cheapflights users on 6/11. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/241:45 pmSEA - LIS
2 stops25h 35mSWISS
mié. 10/2912:15 pmLIS - SEA
2 stops42h 00mSWISS
Deal found 6/11$705

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 junio 12, 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

jue. 10/30

5:05 am-8:10 am

2 stops20h 05m

Lisbon Humberto Delgado

sáb. 11/8

11:00 am-12:59 am

2 stops21h 59m

$548

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

vie. 10/24

9:45 am-9:05 am

1 stop15h 20m

Lisbon Humberto Delgado

vie. 11/14

7:05 am-4:55 pm

1 stop17h 50m

$561

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

mié. 10/22

7:20 am-8:00 am

1 stop16h 40m

Lisbon Humberto Delgado

dom. 11/9

11:15 am-10:13 pm

1 stop18h 58m

$571

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

jue. 10/30

7:50 pm-9:55 pm

1 stop19h 05m

Lisbon Humberto Delgado

sáb. 11/8

10:30 am-9:49 pm

1 stop19h 19m

$572

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

vie. 10/24

6:05 am-11:15 am

2 stops21h 10m

Lisbon Humberto Delgado

vie. 11/14

5:30 am-1:15 pm

1 stop15h 45m

$594

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

vie. 10/24

7:30 am-8:20 am

2 stops16h 50m

Lisbon Humberto Delgado

vie. 11/14

6:10 am-6:26 pm

2 stops20h 16m

$629

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

lun. 10/13

8:20 pm-11:10 pm

1 stop18h 50m

Lisbon Humberto Delgado

mar. 10/28

11:10 am-9:44 pm

1 stop17h 34m

$653

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

mar. 9/2

7:10 pm-9:55 am

1 stop30h 45m

Lisbon Humberto Delgado

mar. 9/16

5:55 am-5:15 pm

1 stop19h 20m

$675

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

vie. 10/24

2:20 pm-10:05 pm

1 stop23h 45m

Lisbon Humberto Delgado

jue. 10/30

11:00 am-2:26 pm

2 stops34h 26m

$700

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

vie. 8/15

7:35 pm-9:35 pm

1 stop18h 00m

Lisbon Humberto Delgado

vie. 8/22

10:15 pm-5:50 pm

1 stop27h 35m

$703

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 20 results
1
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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 June 9, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Lisbon, you should look to book at least 17 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 $1,136). 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 junio 12, 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 junio 12, 2025.
Peruse reviews from past customers who have flown with Delta, SWISS 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
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Turkish Airlines
7.3
Good
3,848 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Scandinavian Airlines
7.3
Good
1,387 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $689 on this airline. Additional options worth looking into are Turkish Airlines and Lufthansa, starting at $694 and $700 round-trip. Delta is currently priced 28% 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 Air Canada ($336), Icelandair ($338), and Lufthansa ($351).

  • 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, 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 $44 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 $34.

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

    Seattle to Lisbon flights have a layover in Dublin the least frequently. Seattle to Lisbon flights stopping in Amsterdam are the next rarest.

  • 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 $1,136). 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$477Average$650FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$581Average$908FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$610Average$872FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$621Average$1,027FlexibilityNo cancel feeOn-time71%
Scandinavian AirlinesCheapest$652Average$828FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$654Average$931FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$688Average$1,035FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$692Average$1,051FlexibilityNo cancel feeOn-time67%
DeltaCheapest$695Average$1,035FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$699Average$1,040FlexibilityNo cancel feeOn-time69%

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