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$397+ Cheap flights from Lisbon (LIS) to Seattle (SEA)

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 6/24. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SEA
may. 24 — may. 311
sáb. 5/24
sáb. 5/31
1 adult, Economy
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Find cheap flights from Lisbon to Seattle with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Lisbon Humberto Delgado to Seattle/Tacoma Intl are usually found in December or April, booked 51 days in advance, depart on a Wednesday or Thursday and return on a Monday

Cheap flight deals from Lisbon to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Lisbon (LIS) to Seattle (SEA). 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 mayo 19, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$701
(FlightHub)

One-way from

$397
(Kiwi.com)

Popular in

August

Cheapest in

December

Average price

$807
Provider with most accurate pricing for Lisbon Humberto Delgado-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Seattle/Tacoma Intl flights.
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From Lisbon Humberto Delgado to Seattle/Tacoma Intl
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One-way flight from Lisbon Humberto Delgado to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 9% potential increase in price ($93 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Lisbon to Seattle

Cheapest flights from Lisbon to Seattle
Explore the most affordable flight options available from Lisbon to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on mayo 19, 2025.

This FlightHub deal was found by Cheapflights users on 5/19. 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. 9/56:45 amLIS - SEA
1 stop15h 05mMultiple Airlines
vie. 9/194:20 pmSEA - LIS
1 stop32h 40mMultiple Airlines
Deal found 5/19$701
This American Airlines deal was found by Cheapflights users on 5/19. 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.
mar. 12/96:30 amLIS - SEA
2 stops24h 35mAmerican Airlines
dom. 12/149:47 amSEA - LIS
1 stop15h 08mAmerican Airlines
Deal found 5/19$758
This British Airways deal was found by Cheapflights users on 5/18. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/96:45 pmLIS - SEA
1 stop24h 25mBritish Airways
lun. 6/231:30 pmSEA - LIS
1 stop15h 15mBritish Airways
Deal found 5/18$789
This Iberia deal was found by Cheapflights users on 5/19. 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.
jue. 6/1912:30 pmLIS - SEA
2 stops20h 14mIberia
jue. 7/171:33 pmSEA - LIS
2 stops18h 32mIberia
Deal found 5/19$796
This Delta deal was found by Cheapflights users on 5/19. 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.
jue. 6/195:00 amLIS - SEA
1 stop14h 40mDelta
jue. 7/171:30 pmSEA - LIS
1 stop13h 45mDelta
Deal found 5/19$802
This KLM deal was found by Cheapflights users on 5/18. 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.
lun. 6/27:30 pmLIS - SEA
1 stop24h 10mKLM
lun. 6/162:10 pmSEA - LIS
1 stop16h 25mKLM
Deal found 5/18$828
This United Airlines deal was found by Cheapflights users on 5/19. 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.
mar. 6/245:05 amLIS - SEA
1 stop15h 20mUnited Airlines
sáb. 12/138:00 amSEA - LIS
1 stop18h 15mUnited Airlines
Deal found 5/19$844
This Lufthansa deal was found by Cheapflights users on 5/19. 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.
mar. 6/245:05 amLIS - SEA
1 stop15h 20mLufthansa
mar. 12/93:10 pmSEA - LIS
1 stop14h 10mLufthansa
Deal found 5/19$848
This SWISS deal was found by Cheapflights users on 5/19. 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.
lun. 6/235:55 amLIS - SEA
2 stops44h 58mSWISS
mar. 12/92:00 pmSEA - LIS
2 stops41h 30mSWISS
Deal found 5/19$855
This oojo deal was found by Cheapflights users on 5/18. 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.
mar. 9/165:55 amLIS - SEA
1 stop19h 20mTurkish Airlines
mié. 9/177:10 pmSEA - LIS
1 stop36h 20mTurkish Airlines
Deal found 5/18$895
This MaxMilhas deal was found by Cheapflights users on 5/18. 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 MaxMilhas is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/212:50 pmLIS - SEA
2 stops33h 23mAir Canada
lun. 6/162:55 pmSEA - LIS
2 stops22h 55mAir Canada
Deal found 5/18$912
This Finnair deal was found by Cheapflights users on 5/19. 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.
mié. 8/64:30 pmLIS - SEA
1 stop31h 30mFinnair
lun. 8/115:40 pmSEA - LIS
1 stop38h 00mFinnair
Deal found 5/19$915

Cheapflights Fare Finder

Customize your flight search to find flights from Lisbon to Seattle 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 mayo 19, 2025.
Use the filters below to find and compare flights from Lisbon to Seattle that are best for you.

Fly from

Lisbon

Fly to

Seattle

Route

Depart

Return

Price

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

vie. 9/5

6:45 am-1:50 pm

1 stop15h 05m

Seattle/Tacoma Intl

vie. 9/19

4:20 pm-9:00 am

1 stop32h 40m

$701

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

lun. 6/9

6:45 pm-11:10 am

1 stop24h 25m

Seattle/Tacoma Intl

lun. 6/23

1:30 pm-12:45 pm

1 stop15h 15m

$789

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

jue. 6/19

12:30 pm-12:44 am

2 stops20h 14m

Seattle/Tacoma Intl

jue. 7/17

1:33 pm-4:05 pm

2 stops18h 32m

$796

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

jue. 6/19

5:00 am-11:40 am

1 stop14h 40m

Seattle/Tacoma Intl

jue. 7/17

1:30 pm-11:15 am

1 stop13h 45m

$802

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

lun. 6/2

7:30 pm-11:40 am

1 stop24h 10m

Seattle/Tacoma Intl

lun. 6/16

2:10 pm-2:35 pm

1 stop16h 25m

$828

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

lun. 6/16

8:25 am-9:34 pm

2 stops21h 09m

Seattle/Tacoma Intl

lun. 6/23

12:05 am-9:05 am

2 stops25h 00m

$829

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

mar. 6/24

5:05 am-12:25 pm

1 stop15h 20m

Seattle/Tacoma Intl

jue. 12/11

5:07 am-8:10 am

2 stops19h 03m

$844

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

mar. 6/24

5:05 am-12:25 pm

1 stop15h 20m

Seattle/Tacoma Intl

mar. 12/9

3:10 pm-1:20 pm

1 stop14h 10m

$848

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

lun. 6/23

5:55 am-6:53 pm

2 stops44h 58m

Seattle/Tacoma Intl

mar. 12/9

2:00 pm-3:30 pm

2 stops41h 30m

$855

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

mar. 9/16

5:55 am-5:15 pm

1 stop19h 20m

Seattle/Tacoma Intl

mié. 9/17

7:10 pm-3:30 pm

1 stop36h 20m

$895

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/18

Showing 1-10 of 24 results
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Compare providers for flights from Lisbon to Seattle

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 Lisbon to Seattle in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust 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 Lisbon-Seattle flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Lisbon-Seattle flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Lisbon-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Lisbon-Seattle flights, Cheapflights users trust AranGrant the most. AranGrant 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 Lisbon-Seattle 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 Lisbon to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Lisbon 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 Lisbon to Seattle

How far ahead should I book a flight from Lisbon to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Lisbon to Seattle. Price data was last updated on May 16, 2025.

The price you pay for your flight from Lisbon to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 50 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Lisbon to Seattle?

Currently, January is the cheapest month in which you can book a flight from Lisbon to Seattle (average of $238). Flying from Lisbon to Seattle in July is currently the most expensive (average of $401). 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 LIS to SEA?

Find hourly flight availability from Lisbon to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated mayo 19, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 18% on flights from Lisbon to Seattle by exploring options for tickets in the afternoon.

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated mayo 19, 2025.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Crew

8.5

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Crew

8.5

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!
KLM
7.8
Good
1,344 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Crew

8.5

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!
Finnair
7.6
Good
1,282 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Crew

8.5

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
1,598 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Crew

8.5

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
8,743 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Crew

8.5

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 Lisbon to Seattle. 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 Lisbon to Seattle round-trip?

    Flying on British Airways is currently your cheapest option to Seattle, with prices starting at $789. Additional round-trip tickets that might be worth considering are offered by Iberia and Delta, with the lowest prices starting at $796 and $802, respectively. British Airways is priced at 15% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Lisbon to Seattle one-way?

    To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $540. British Airways flights start at $542 while deals on American Airlines start at $546 one-way.

  • Can I find deals for flights from Lisbon to Seattle that include hotel bookings?

    Yes. In addition to deals on Lisbon to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Lisbon to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Lisbon to Seattle.

  • Can I find deals for business class flights from Lisbon to Seattle?

    Yes. Cheapflights offers flight deals from Lisbon to Seattle 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 Lisbon to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Lisbon to Seattle (average of $238). Flying from Lisbon to Seattle in July is currently the most expensive (average of $401). 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
SeaTac
Tukwila
Tacoma
Lakewood
Renton
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Cle Elum
Kent
Centralia
Kirkland
Aberdeen
Shelton
Silverdale
Redmond

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Lisbon to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Lisbon to Portland flights
Porto to Seattle flights

Top 5 airlines flying from Lisbon to Seattle

Discover the top 5 airlines that operate flights from Lisbon to Seattle. 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 mayo 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$717Average$823FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$720Average$1,084FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$738Average$867FlexibilityNo cancel feeOn-time69%
Air FranceCheapest$762Average$1,067FlexibilityNo cancel feeOn-time77%
DeltaCheapest$775Average$929FlexibilityNo cancel feeOn-timeN/A

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