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$382+ 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SEA
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Portugal to Seattle

Keep the following information in mind while searching for Portugal to Seattle flight deals. Data was last updated September 16, 2025.

Round-trip from

$714
(Kiwi.com)

One-way from

$382
(Kiwi.com)

Popular in

July

Cheapest in

December

Average price

$912
From Portugal to Seattle/Tacoma Intl
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One-way flight from Portugal to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 14% potential increase in price ($164 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Tue 11/189:05 amLIS - SEA
2 stops33h 30mMultiple Airlines
Fri 11/287:05 amSEA - LIS
1 stop14h 20mMultiple Airlines
Deal found 9/14$714
This Trip.com deal was found by Cheapflights users on 9/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/185:00 amLIS - SEA
2 stops22h 05mMultiple Airlines
Tue 11/257:57 amSEA - LIS
2 stops17h 23mMultiple Airlines
Deal found 9/14$715
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Wed 11/198:35 amLIS - SEA
1 stop18h 30mMultiple Airlines
Tue 11/257:57 amSEA - LIS
1 stop14h 48mMultiple Airlines
Deal found 9/15$716
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 11/169:55 amLIS - SEA
1 stop16h 25mMultiple Airlines
Sun 11/238:05 pmSEA - LIS
1 stop16h 55mMultiple Airlines
Deal found 9/14$723
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Wed 11/198:35 amLIS - SEA
1 stop18h 30mMultiple Airlines
Sat 11/297:57 amSEA - LIS
1 stop14h 48mMultiple Airlines
Deal found 9/15$729
This Iberia deal was found by Cheapflights users on 9/15. 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.
Thu 11/66:30 amLIS - SEA
2 stops24h 48mMultiple Airlines
Sat 11/226:50 pmSEA - LIS
1 stop19h 40mMultiple Airlines
Deal found 9/15$753
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Mon 9/2211:05 amLIS - SEA
1 stop18h 59mAmerican Airlines
Sun 10/58:20 pmSEA - LIS
1 stop18h 45mAmerican Airlines
Deal found 9/14$754
This British Airways deal was found by Cheapflights users on 9/15. 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.
Mon 11/1711:05 amLIS - SEA
1 stop19h 04mBritish Airways
Mon 11/2411:42 amSEA - LIS
2 stops26h 13mBritish Airways
Deal found 9/15$755
This Delta deal was found by Cheapflights users on 9/14. 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.
Fri 9/266:40 amOPO - SEA
1 stop17h 25mDelta
Tue 9/301:30 pmSEA - OPO
1 stop18h 00mDelta
Deal found 9/14$775
This Iberia deal was found by Cheapflights users on 9/14. 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.
Tue 11/188:40 pmOPO - SEA
2 stops34h 38mIberia
Mon 12/17:19 amSEA - OPO
2 stops20h 26mIberia
Deal found 9/14$780
This KLM deal was found by Cheapflights users on 9/14. 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.
Wed 10/2911:15 amOPO - SEA
1 stop32h 30mKLM
Wed 11/59:29 amSEA - OPO
2 stops17h 01mKLM
Deal found 9/14$784
This KLM deal was found by Cheapflights users on 9/15. 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 10/134:20 pmOPO - SEA
1 stop33h 20mKLM
Mon 10/201:30 pmSEA - OPO
1 stop18h 00mKLM
Deal found 9/15$792

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 September 16, 2025.
Use the filters below to find and compare flights from Portugal to Seattle that are best for you.

Fly from

Portugal

Fly to

Seattle

Route

Depart

Return

Price

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Tue 11/18

5:00 am-7:05 pm

2 stops22h 05m

Seattle/Tacoma Intl

Tue 11/25

7:57 am-9:20 am

2 stops17h 23m

$715

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 11/6

6:30 am-11:18 pm

2 stops24h 48m

Seattle/Tacoma Intl

Sat 11/22

6:50 pm-10:30 pm

1 stop19h 40m

$753

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 12/18

8:55 am-9:59 pm

1 stop21h 04m

Seattle/Tacoma Intl

Tue 12/30

1:25 pm-5:40 pm

1 stop20h 15m

$754

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Mon 11/17

11:05 am-10:09 pm

1 stop19h 04m

Seattle/Tacoma Intl

Sun 11/23

11:42 am-9:45 pm

2 stops26h 03m

$755

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Tue 3/3

11:10 am-9:56 pm

1 stop18h 46m

Seattle/Tacoma Intl

Tue 3/10

7:50 pm-5:40 pm

1 stop14h 50m

$755

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Tue 11/18

11:05 am-10:09 pm

1 stop19h 04m

Seattle/Tacoma Intl

Sun 11/23

11:42 am-9:45 pm

2 stops26h 03m

$755

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Tue 3/3

11:10 am-9:56 pm

1 stop18h 46m

Seattle/Tacoma Intl

Thu 3/12

7:50 pm-10:05 am

1 stop31h 15m

$755

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 11/20

10:55 am-10:10 pm

1 stop19h 15m

Seattle/Tacoma Intl

Sun 11/23

11:42 am-9:45 pm

2 stops26h 03m

$755

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 3/4

11:15 am-9:56 pm

1 stop18h 41m

Seattle/Tacoma Intl

Tue 3/10

1:48 pm-9:45 pm

2 stops24h 57m

$755

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 3/5

10:55 am-9:56 pm

1 stop19h 01m

Seattle/Tacoma Intl

Tue 3/10

1:48 pm-9:45 pm

2 stops24h 57m

$755

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 36 results
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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, January is the cheapest month in which you can book a flight from Portugal to Seattle (average of $238). Flying from Portugal to Seattle in June is currently the most expensive (average of $387). 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 PT to SEA?

Find hourly flight availability from Portugal 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 September 16, 2025.

When flying from Portugal to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 16, 2025.
Read reviews from past customers who have flown Delta, KLM, 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
8.0
Very good
7,954 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Delta
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
KLM
7.8
Good
1,385 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Air France
7.4
Good
1,469 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
United Airlines
7.4
Good
8,929 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
British Airways
6.7
Okay
7,361 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

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 17h 25m. There are 5083 mi between Portugal and Seattle. This flight may include one or multiple stops.

  • 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, January is the cheapest month in which you can book a flight from Portugal to Seattle (average of $238). Flying from Portugal to Seattle in June is currently the most expensive (average of $387). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

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Alternative routes for Portugal to Seattle

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Top 5 airlines flying from Portugal to Seattle

Discover the top 5 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$720Average$1,016FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$738Average$1,214FlexibilityNo cancel feeOn-time69%
Air FranceCheapest$762Average$1,151FlexibilityNo cancel feeOn-time77%
DeltaCheapest$775Average$1,019FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$794Average$870FlexibilityNo cancel feeOn-time75%

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