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$270+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SEA
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$661
(Travelocity)

One-way from

$270
(Kiwi.com)

Popular in

June

Cheapest in

December

Average price

$866
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 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. 8% potential increase in price ($86 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This FlightHub deal was found by Cheapflights users on 2/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/56:25 pmLIS - SEA
1 stop27h 25mMultiple Airlines
Fri 9/194:20 pmSEA - LIS
1 stop20h 20mMultiple Airlines
Deal found 2/20$658
This Travelocity deal was found by Cheapflights users on 2/20. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1610:15 pmLIS - SEA
1 stop26h 44mAer Lingus
Mon 5/266:45 pmSEA - LIS
1 stop18h 50mAer Lingus
Deal found 2/20$661
This Finnair deal was found by Cheapflights users on 2/20. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/116:30 amLIS - SEA
2 stops23h 56mFinnair
Sun 3/308:20 pmSEA - LIS
1 stop18h 40mFinnair
Deal found 2/20$713
This British Airways deal was found by Cheapflights users on 2/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/610:55 amLIS - SEA
1 stop19h 02mBritish Airways
Sun 3/97:50 pmSEA - LIS
1 stop14h 55mBritish Airways
Deal found 2/20$717
This American Airlines deal was found by Cheapflights users on 2/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1611:05 amLIS - SEA
2 stops17h 32mAmerican Airlines
Mon 5/261:30 pmSEA - LIS
1 stop20h 25mAmerican Airlines
Deal found 2/20$725
This Expedia deal was found by Cheapflights users on 2/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:35 amLIS - SEA
2 stops24h 34mIberia
Tue 5/131:30 pmSEA - LIS
2 stops25h 55mIberia
Deal found 2/20$731
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/175:00 amLIS - SEA
1 stop14h 40mDelta
Wed 4/21:50 pmSEA - LIS
2 stops20h 05mDelta
Deal found 2/20$784
This Air France deal was found by Cheapflights users on 2/20. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/16:30 pmLIS - SEA
1 stop25h 21mAir France
Sun 3/91:35 pmSEA - LIS
1 stop18h 35mAir France
Deal found 2/20$790
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/66:00 amOPO - SEA
2 stops47h 30mUnited Airlines
Sun 3/95:15 amSEA - OPO
2 stops26h 55mUnited Airlines
Deal found 2/20$791
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/216:10 amLIS - SEA
1 stop15h 10mUnited Airlines
Thu 4/38:15 amSEA - LIS
2 stops16h 05mUnited Airlines
Deal found 2/20$792
This Lufthansa deal was found by Cheapflights users on 2/20. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/15:05 amLIS - SEA
1 stop14h 50mLufthansa
Sat 5/171:45 pmSEA - LIS
2 stops35h 35mLufthansa
Deal found 2/20$795
This Gotogate deal was found by Cheapflights users on 2/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/612:10 pmOPO - SEA
1 stop32h 15mLufthansa
Sun 4/136:50 pmSEA - OPO
1 stop20h 30mLufthansa
Deal found 2/20$798

Find flights from Portugal to Seattle within your budget

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 February 20, 2025.

Fly from

Portugal

Fly to

Seattle

Route

Depart

Return

Price

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 4/16

10:15 pm-4:59 pm

1 stop26h 44m

Seattle/Tacoma Intl

Mon 5/26

6:45 pm-9:35 pm

1 stop18h 50m

$661

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Tue 3/11

6:30 am-11:26 pm

2 stops23h 56m

Seattle/Tacoma Intl

Sun 3/30

8:20 pm-11:00 pm

1 stop18h 40m

$713

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 3/6

6:30 am-11:10 pm

2 stops24h 40m

Seattle/Tacoma Intl

Sun 3/9

7:50 pm-5:45 pm

1 stop14h 55m

$716

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 3/6

10:55 am-9:57 pm

1 stop19h 02m

Seattle/Tacoma Intl

Sun 3/9

7:50 pm-5:45 pm

1 stop14h 55m

$717

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 4/16

11:05 am-8:37 pm

2 stops17h 32m

Seattle/Tacoma Intl

Mon 5/26

1:30 pm-5:55 pm

1 stop20h 25m

$725

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 5/8

6:35 am-11:09 pm

2 stops24h 34m

Seattle/Tacoma Intl

Tue 5/13

1:30 pm-11:25 pm

2 stops25h 55m

$731

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Mon 3/17

5:00 am-12:40 pm

1 stop14h 40m

Seattle/Tacoma Intl

Wed 4/2

1:50 pm-5:55 pm

2 stops20h 05m

$784

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 3/6

6:00 am-9:30 pm

2 stops47h 30m

Seattle/Tacoma Intl

Sun 3/9

5:15 am-3:10 pm

2 stops26h 55m

$791

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 3/21

6:10 am-2:20 pm

1 stop15h 10m

Seattle/Tacoma Intl

Thu 4/3

8:15 am-8:20 am

2 stops16h 05m

$792

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 5/1

5:05 am-11:55 am

1 stop14h 50m

Seattle/Tacoma Intl

Sat 5/17

1:45 pm-9:20 am

2 stops35h 35m

$795

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 31 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.

Travel insights for flights from Portugal to Seattle

Get recent, data-driven insights about flights from Portugal to Seattle including ideal travel times, pricing trends, and more.

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 $411). 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 February 20, 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 February 20, 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
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,219 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.6
Good
1,274 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS
7.5
Good
1,568 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic
7.5
Good
654 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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?

    $616 is the cheapest one-way deal found within the past few days, from Turkish Airlines. You may also be able to find cheap deals on Finnair and Aer Lingus, with prices starting from $650 and $656, 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 $411). 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
Renton
Tacoma
Lacey
Ocean Shores
Leavenworth
Olympia
Federal Way
Centralia
Marysville
Cle Elum
Mukilteo
Aberdeen
Lakewood
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale

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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$738Average$950FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$745Average$967FlexibilityNo cancel feeOn-time70%
DeltaCheapest$756Average$859FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$756Average$921FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$770Average$854FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$792Average$873FlexibilityNo cancel feeOn-time71%
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