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$313+ 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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SEA
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$709
(FlightHub)

One-way from

$313
(Kiwi.com)

Popular in

August

Cheapest in

December

Average price

$1,112
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. 10% potential increase in price ($105 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 June 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 junio 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/9. 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.
mié. 10/227:15 amLIS - SEA
1 stop14h 45mMultiple Airlines
mar. 10/287:20 amSEA - LIS
2 stops25h 45mMultiple Airlines
Deal found 6/9$709
This American Airlines deal was found by Cheapflights users on 6/9. 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.
mié. 10/2211:05 amLIS - SEA
1 stop18h 39mAmerican Airlines
mié. 10/297:50 pmSEA - LIS
1 stop19h 00mAmerican Airlines
Deal found 6/9$758
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/174:30 pmLIS - SEA
1 stop27h 05mBritish Airways
mié. 10/221:30 pmSEA - LIS
1 stop20h 25mBritish Airways
Deal found 6/11$759
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. 10/175:00 amLIS - SEA
1 stop14h 50mDelta
mié. 10/226:00 amSEA - LIS
2 stops21h 15mDelta
Deal found 6/12$761
This flugladen.de 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/198:20 pmOPO - SEA
1 stop23h 20mKLM
lun. 6/235:35 pmSEA - OPO
1 stop33h 05mKLM
Deal found 6/12$779
This British Airways deal was found by Cheapflights users on 6/10. 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.
jue. 6/199:55 amOPO - SEA
1 stop16h 25mBritish Airways
lun. 6/238:20 pmSEA - OPO
1 stop15h 30mBritish Airways
Deal found 6/10$783
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.
jue. 6/196:30 amOPO - SEA
2 stops25h 23mDelta
lun. 6/235:35 pmSEA - OPO
1 stop16h 20mDelta
Deal found 6/12$787
This lol.travel deal was found by Cheapflights users on 6/10. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/306:00 amOPO - SEA
1 stop13h 55mLufthansa
lun. 12/222:00 pmSEA - OPO
1 stop16h 55mLufthansa
Deal found 6/10$825
This United Airlines deal was found by Cheapflights users on 6/10. 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.
mié. 10/16:00 amOPO - SEA
1 stop13h 55mUnited Airlines
jue. 12/2511:50 pmSEA - OPO
2 stops30h 55mUnited Airlines
Deal found 6/10$846
This Air Canada deal was found by Cheapflights users on 6/9. 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.
lun. 10/205:05 amLIS - SEA
2 stops36h 16mAir Canada
mié. 10/298:20 pmSEA - LIS
2 stops30h 00mAir Canada
Deal found 6/9$848
This Trip.com deal was found by Cheapflights users on 6/10. 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.
jue. 6/198:05 amOPO - SEA
2 stops20h 35mMultiple Airlines
lun. 6/233:45 pmSEA - OPO
2 stops19h 00mMultiple Airlines
Deal found 6/10$855
This SWISS deal was found by Cheapflights users on 6/10. 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. 10/175:55 amLIS - SEA
2 stops20h 41mSWISS
mié. 10/221:45 pmSEA - LIS
2 stops17h 00mSWISS
Deal found 6/10$869

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 junio 12, 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

mié. 10/22

7:15 am-2:00 pm

1 stop14h 45m

Seattle/Tacoma Intl

mar. 10/28

7:20 am-4:05 pm

2 stops25h 45m

$709

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

mié. 10/22

11:05 am-9:44 pm

1 stop18h 39m

Seattle/Tacoma Intl

mié. 10/29

7:50 pm-9:50 pm

1 stop19h 00m

$758

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

vie. 10/17

4:30 pm-11:35 am

1 stop27h 05m

Seattle/Tacoma Intl

mié. 10/22

1:30 pm-5:55 pm

1 stop20h 25m

$759

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

vie. 10/17

5:00 am-11:50 am

1 stop14h 50m

Seattle/Tacoma Intl

mié. 10/22

6:00 am-11:15 am

2 stops21h 15m

$761

PortoSeattle

OPO - SEA

OPOSEA

Porto

mar. 9/30

6:00 am-11:55 am

1 stop13h 55m

Seattle/Tacoma Intl

lun. 12/22

2:00 pm-2:55 pm

1 stop16h 55m

$825

PortoSeattle

OPO - SEA

OPOSEA

Porto

mié. 10/1

6:00 am-11:55 am

1 stop13h 55m

Seattle/Tacoma Intl

jue. 12/25

11:50 pm-2:45 pm

2 stops30h 55m

$846

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

lun. 10/20

5:05 am-9:21 am

2 stops36h 16m

Seattle/Tacoma Intl

mié. 10/29

8:20 pm-9:20 am

2 stops30h 00m

$848

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

vie. 10/17

5:55 am-6:36 pm

2 stops20h 41m

Seattle/Tacoma Intl

mié. 10/22

1:45 pm-2:45 pm

2 stops17h 00m

$869

PortoSeattle

OPO - SEA

OPOSEA

Porto

lun. 9/29

12:10 pm-10:16 pm

2 stops42h 06m

Seattle/Tacoma Intl

jue. 12/25

8:20 pm-2:45 pm

2 stops34h 25m

$882

PortoSeattle

OPO - SEA

OPOSEA

Porto

mar. 9/30

10:00 pm-8:09 pm

2 stops30h 09m

Seattle/Tacoma Intl

lun. 12/22

10:20 am-8:00 pm

2 stops25h 40m

$902

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 39 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 July is currently the most expensive (average of $391). 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 junio 12, 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.

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 junio 12, 2025.
See what other customers who have flown with Delta, KLM and Finnair from Portugal to Seattle have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

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

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

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
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

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
1,290 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

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
1,463 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

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

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

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 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.

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

    $519 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on Aer Lingus and Turkish Airlines, with prices starting from $603 and $672, 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, 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 July is currently the most expensive (average of $391). 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 Portugal?

Book flights to Portugal if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

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Alternative routes for Portugal to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Portugal to Seattle

Discover the top 6 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$717Average$823FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$720Average$1,074FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$738Average$867FlexibilityNo cancel feeOn-time69%
KLMCheapest$756Average$848FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$762Average$1,067FlexibilityNo cancel feeOn-time77%
DeltaCheapest$775Average$859FlexibilityNo cancel feeOn-timeN/A

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