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$243+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 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 July 3, 2025.

Round-trip from

$543
(KLM)

One-way from

$243
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$1,048
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 ($202 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This KLM deal was found by Cheapflights users on 7/1. 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 11/37:20 amSEA - LIS
1 stop17h 40mMultiple Airlines
Tue 11/1810:00 amLIS - SEA
1 stop17h 29mMultiple Airlines
Deal found 7/1$543
This Air Canada deal was found by Cheapflights users on 7/1. 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.
Fri 10/247:30 amSEA - LIS
1 stop19h 35mAir Canada
Fri 11/1411:20 amLIS - SEA
2 stops30h 11mAir Canada
Deal found 7/1$544
This FlightHub deal was found by Cheapflights users on 7/2. 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 FlightHub 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 11/145:00 amLIS - SEA
1 stop15h 10mLufthansa
Deal found 7/2$545
This Delta deal was found by Cheapflights users on 7/1. 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 11/37:20 amSEA - LIS
1 stop17h 40mDelta
Fri 11/1411:15 amLIS - SEA
1 stop18h 58mDelta
Deal found 7/1$547
This Air France deal was found by Cheapflights users on 7/1. 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.
Mon 11/37:20 amSEA - LIS
1 stop17h 40mAir France
Mon 11/176:30 pmLIS - SEA
1 stop24h 55mAir France
Deal found 7/1$548
This Iberia deal was found by Cheapflights users on 7/1. 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.
Sat 11/151:33 amSEA - LIS
2 stops32h 32mIberia
Tue 11/256:30 amLIS - SEA
2 stops22h 45mIberia
Deal found 7/1$550
This Ovago deal was found by Cheapflights users on 7/1. 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.
Thu 10/307:50 pmSEA - LIS
1 stop19h 05mBritish Airways
Sat 11/810:30 amLIS - SEA
1 stop19h 19mBritish Airways
Deal found 7/1$563
This United Airlines deal was found by Cheapflights users on 7/2. 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 10/283:00 pmSEA - LIS
1 stop16h 30mUnited Airlines
Sat 11/811:20 amLIS - SEA
2 stops19h 50mUnited Airlines
Deal found 7/2$567
This Booking.com deal was found by Cheapflights users on 7/1. 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 8/257:35 pmSEA - LIS
1 stop18h 00mAer Lingus
Tue 9/910:15 pmLIS - SEA
1 stop27h 35mAer Lingus
Deal found 7/1$608
This Gotogate deal was found by Cheapflights users on 7/1. 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.
Sat 8/93:45 pmSEA - LIS
1 stop21h 35mIcelandair
Sun 8/2410:20 pmLIS - SEA
1 stop21h 05mIcelandair
Deal found 7/1$624

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 July 3, 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

Mon 11/3

7:20 am-9:00 am

1 stop17h 40m

Lisbon Humberto Delgado

Tue 11/18

10:00 am-7:29 pm

1 stop17h 29m

$543

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 10/24

7:30 am-11:05 am

1 stop19h 35m

Lisbon Humberto Delgado

Fri 11/14

11:20 am-9:31 am

2 stops30h 11m

$544

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 10/24

6:50 pm-9:50 pm

1 stop19h 00m

Lisbon Humberto Delgado

Fri 11/14

5:00 am-12:10 pm

1 stop15h 10m

$545

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 11/3

7:20 am-9:00 am

1 stop17h 40m

Lisbon Humberto Delgado

Fri 11/14

11:15 am-10:13 pm

1 stop18h 58m

$547

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 11/3

7:20 am-9:00 am

1 stop17h 40m

Lisbon Humberto Delgado

Mon 11/17

6:30 pm-11:25 am

1 stop24h 55m

$548

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 11/15

1:33 am-6:05 pm

2 stops32h 32m

Lisbon Humberto Delgado

Tue 11/25

6:30 am-9:15 pm

2 stops22h 45m

$550

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 10/30

7:50 pm-9:55 pm

1 stop19h 05m

Lisbon Humberto Delgado

Sat 11/8

10:30 am-9:49 pm

1 stop19h 19m

$563

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 10/28

3:00 pm-2:30 pm

1 stop16h 30m

Lisbon Humberto Delgado

Sat 11/8

11:20 am-11:10 pm

2 stops19h 50m

$567

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 8/25

7:35 pm-9:35 pm

1 stop18h 00m

Lisbon Humberto Delgado

Tue 9/9

10:15 pm-5:50 pm

1 stop27h 35m

$608

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 8/9

3:45 pm-9:20 pm

1 stop21h 35m

Lisbon Humberto Delgado

Sun 8/24

10:20 pm-11:25 am

1 stop21h 05m

$624

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 13 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 27, 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 $612). Flying from Seattle to Lisbon in June is currently the most expensive (average of $1,130). 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 July 3, 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.

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 July 3, 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
8.0
Very good
7,982 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

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
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

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!
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

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
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

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!
Air Canada
7.1
Good
9,681 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

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!
Aer Lingus
7.1
Good
1,144 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

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 Air Canada. Our recent data shows that you can find tickets from as low as $544 on this airline. Additional options worth looking into are Lufthansa and Delta, starting at $545 and $547 round-trip. Air Canada is currently priced 43% 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 $40 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 $43 per day.

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

    Seattle to Lisbon flights have a layover in Amsterdam the least frequently. Seattle to Lisbon flights stopping in Toronto 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 $1,130). 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?

Book flights to Seattle if you plan to visit one of these locations
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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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$477Average$649FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$581Average$900FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$593Average$866FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$627Average$1,047FlexibilityNo cancel feeOn-time71%
Scandinavian AirlinesCheapest$652Average$828FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$667Average$935FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$683Average$1,039FlexibilityNo cancel feeOn-time77%
KLMCheapest$694Average$914FlexibilityNo cancel feeOn-time75%
DeltaCheapest$694Average$1,036FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$698Average$1,026FlexibilityNo cancel feeOn-time69%

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