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$341+ Cheap flights from Portugal 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SEA
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
1 adult, Economy
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Cheap flight deals from Portugal to Seattle

Cheapest flights from Portugal to Seattle
Explore the most affordable flight options available from Portugal to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 22, 2026.

This lastminute.com deal was found by Cheapflights users on 3/17. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2410:15 pm
LIS
-
SEA
1 stop26h 55m
Aer Lingus
Sat 5/97:10 pm
SEA
-
LIS
1 stop18h 25m
Aer Lingus
Deal found 3/17$713
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/110:15 pm
LIS
-
SEA
1 stop26h 55m
Aer Lingus
Sat 5/167:10 pm
SEA
-
LIS
1 stop18h 25m
Aer Lingus
Deal found 3/19$729
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1910:15 pm
LIS
-
SEA
1 stop26h 55m
Aer Lingus
Mon 5/47:10 pm
SEA
-
LIS
1 stop18h 25m
Aer Lingus
Deal found 3/18$757
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/29:45 am
OPO
-
SEA
1 stop17h 38m
Multiple Airlines
Sat 5/97:00 pm
SEA
-
OPO
2 stops39h 30m
Multiple Airlines
Deal found 3/18$822
This Mytrip deal was found by Cheapflights users on 3/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/26:10 am
LIS
-
SEA
2 stops35h 30m
Multiple Airlines
Sat 5/97:00 pm
SEA
-
LIS
2 stops19h 05m
Multiple Airlines
Deal found 3/18$838
This AirNGo deal was found by Cheapflights users on 3/19. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/147:00 am
LIS
-
SEA
2 stops23h 45m
Scandinavian Airlines
Fri 5/293:55 pm
SEA
-
LIS
1 stop15h 40m
Scandinavian Airlines
Deal found 3/19$861
This Kiwi.com deal was found by Cheapflights users on 3/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/249:35 am
LIS
-
SEA
1 stop17h 48m
Multiple Airlines
Sat 5/97:00 pm
SEA
-
LIS
2 stops42h 05m
Multiple Airlines
Deal found 3/22$874
This Kiwi.com deal was found by Cheapflights users on 3/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/71:30 pm
OPO
-
SEA
1 stop37h 53m
Multiple Airlines
Wed 5/137:00 pm
SEA
-
OPO
2 stops43h 55m
Multiple Airlines
Deal found 3/20$891
This FlightHub deal was found by Cheapflights users on 3/17. 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 3/206:05 am
LIS
-
SEA
1 stop19h 00m
Turkish Airlines
Wed 4/157:10 pm
SEA
-
LIS
1 stop36h 35m
Turkish Airlines
Deal found 3/17$905
This FlightHub deal was found by Cheapflights users on 3/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/206:05 am
LIS
-
SEA
1 stop19h 00m
Turkish Airlines
Thu 4/167:10 pm
SEA
-
LIS
1 stop20h 10m
Turkish Airlines
Deal found 3/18$907
This FlightHub deal was found by Cheapflights users on 3/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/85:55 am
LIS
-
SEA
1 stop19h 20m
Turkish Airlines
Wed 4/227:10 pm
SEA
-
LIS
1 stop20h 35m
Turkish Airlines
Deal found 3/18$909
This oojo deal was found by Cheapflights users on 3/18. 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.
Sat 5/26:15 am
OPO
-
SEA
1 stop19h 00m
Turkish Airlines
Sat 5/97:10 pm
SEA
-
OPO
1 stop20h 20m
Turkish Airlines
Deal found 3/18$918

Find flight deals from Portugal to Seattle

Keep the following information in mind while searching for Portugal to Seattle flight deals. Data was last updated March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$713
(lastminute.com)

One-way from

$341
(Kiwi.com)

Popular in

January

Cheapest in

February

Average price

$1,060
Provider with most accurate pricing for Lisbon Humberto Delgado-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Seattle/Tacoma Intl flights.
Search Deals
From Portugal to Seattle/Tacoma Intl
Search Deals
One-way flight from Portugal to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portugal 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 March 22, 2026.
Use the filters below to find and compare flights from Portugal to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 4/24

10:15 pm-5:10 pm

1 stop26h 55m

Seattle/Tacoma Intl

Sat 5/9

7:10 pm-9:35 pm

1 stop18h 25m

$713
Quickest round-trip

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 6/6

5:00 am-11:37 am

1 stop14h 37m

Seattle/Tacoma Intl

Mon 6/15

1:55 pm-2:35 pm

1 stop16h 40m

$911

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 6/6

5:00 am-4:35 pm

2 stops19h 35m

Seattle/Tacoma Intl

Mon 6/15

1:55 pm-2:35 pm

1 stop16h 40m

$921

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sat 4/11

5:00 am-2:50 pm

2 stops17h 50m

Seattle/Tacoma Intl

Sat 4/25

12:00 pm-3:25 pm

2 stops19h 25m

$939

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 6/6

4:25 pm-11:35 am

1 stop27h 10m

Seattle/Tacoma Intl

Mon 6/15

1:30 pm-11:10 pm

1 stop25h 40m

$944

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 4/24

5:00 am-2:42 pm

2 stops17h 42m

Seattle/Tacoma Intl

Sat 5/9

7:35 am-11:15 am

2 stops19h 40m

$944

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 5/14

7:00 am-10:45 pm

2 stops23h 45m

Seattle/Tacoma Intl

Fri 5/29

10:00 am-3:45 pm

2 stops21h 45m

$950

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 4/8

5:00 am-6:26 pm

2 stops21h 26m

Seattle/Tacoma Intl

Wed 4/22

8:50 am-2:35 pm

2 stops21h 45m

$951

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 5/7

5:00 am-11:42 am

1 stop14h 42m

Seattle/Tacoma Intl

Wed 5/13

6:40 pm-10:00 pm

1 stop19h 20m

$955

PortoSeattle

OPO - SEA

OPOSEA

Porto

Tue 9/15

6:00 am-8:03 pm

2 stops22h 03m

Seattle/Tacoma Intl

Fri 9/25

11:50 pm-9:45 am

2 stops25h 55m

$956

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/21

Showing 1-10 of 36 resultsSorted by cheapest first
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Best time to book a flight from Portugal to Seattle

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

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

Currently, September is the cheapest month in which you can book a flight from Portugal to Seattle (average of $701). Flying from Portugal to Seattle in July is currently the most expensive (average of $970). 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.

How often are flights from Portugal to Seattle delayed?

About 50% of weekly flights between Portugal and Seattle have experienced delays in the past year, with the average delay time being 108 minutes.

What is the most punctual flight time for Portugal to Seattle flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

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 March 22, 2026.
Read reviews from past customers who have flown Delta and Air France from Portugal to Seattle. 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
7.9
Good
8,315 reviews

Crew

8.5

Overall

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,315 reviews
Delta
7.9
Good
8,315 reviews

Crew

8.5

Overall

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air France
7.4
Good
1,547 reviews
Delta
7.9
Good
8,315 reviews

Crew

8.5

Overall

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Portugal to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Portugal?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to Seattle from Portugal.

  • How long is the flight from Portugal to Seattle?

    Departing from Portugal to Seattle will take you 14h 37m. There are 5199 mi between Portugal and Seattle. This flight may include one or multiple stops.

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

    $563 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on British Airways and American Airlines, with prices starting from $568 and $588, respectively.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Portugal to Seattle (average of $701). Flying from Portugal to Seattle in July is currently the most expensive (average of $970). 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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Tacoma
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Kirkland
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Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Portugal to Seattle

Discover the top 2 airlines that operate flights from Portugal 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 March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest$762Average$1,261FlexibilityNo cancel feeOn-time77%
DeltaCheapest$775Average$1,060FlexibilityNo cancel feeOn-timeN/A

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