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

$584 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 Turkish Airlines and Finnair, with prices starting from $678 and $733, respectively.

What are the most popular airlines that fly from Portugal to Seattle?

Consider American Airlines, Air France or British Airways when booking your flight. These represent the most popular airlines when flying from Portugal to Seattle.

How far in advance should I book a flight from Portugal to Seattle?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 51 days in advance, which can save you up to 45% on flights from Portugal to Seattle compared to booking the week you need them. Waiting 51 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $809. For sooner than that we have options available in the next 3 days from $966.

What is the cheapest month to fly from Portugal to Seattle?

Our data shows that December tends to be the cheapest month to fly to Seattle from Portugal. Users have commonly found prices around $952 for the month, but tickets can be as low as $745. Due to multiple factors, prepare for potentially higher prices in November.

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.

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.

$966+ Flights from Portugal to Seattle - Compare & Save Big

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Cheap flight deals from Portugal to Seattle

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$711 (FlightHub)
One-way from	$345 (Kiwi.com)
Popular in	November
Cheapest in	December
Average price	$800

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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High demand for flights, 1% potential price rise

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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).

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Average for round-trip flights in April 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 April 29, 2025.

Fri 9/56:45 amLIS - SEA

1 stop15h 05mMultiple Airlines

Fri 9/194:20 pmSEA - LIS

1 stop32h 40mMultiple Airlines

Deal found 4/28

$711

Mon 5/511:05 amLIS - SEA

1 stop18h 45mBritish Airways

Sun 5/181:30 pmSEA - LIS

1 stop18h 50mBritish Airways

Deal found 4/28

$769

Tue 6/1710:15 pmLIS - SEA

1 stop27h 35mAer Lingus

Tue 6/247:35 pmSEA - LIS

1 stop18h 00mAer Lingus

Deal found 4/27

$795

Tue 6/175:00 amLIS - SEA

1 stop14h 40mDelta

Tue 6/2411:23 amSEA - LIS

2 stops19h 27mDelta

Deal found 4/27

$815

Mon 5/511:05 amLIS - SEA

1 stop18h 45mAmerican Airlines

Mon 5/192:20 pmSEA - LIS

2 stops24h 50mAmerican Airlines

Deal found 4/27

$817

Mon 6/27:30 pmLIS - SEA

1 stop24h 10mKLM

Mon 6/162:10 pmSEA - LIS

1 stop20h 30mKLM

Deal found 4/28

$819

Thu 6/128:20 pmOPO - SEA

1 stop23h 20mKLM

Thu 6/192:10 pmSEA - OPO

1 stop24h 05mKLM

Deal found 4/28

$835

Wed 6/115:05 amLIS - SEA

2 stops25h 08mUnited Airlines

Wed 6/1810:15 pmSEA - LIS

1 stop28h 15mUnited Airlines

Deal found 4/27

$838

Fri 5/236:15 amOPO - SEA

1 stop18h 44mLufthansa

Sat 5/312:15 pmSEA - OPO

1 stop24h 30mLufthansa

Deal found 4/27

$855

Sun 5/255:55 amLIS - SEA

2 stops23h 16mSWISS

Sun 6/11:45 pmSEA - LIS

2 stops25h 35mSWISS

Deal found 4/27

$861

Fri 5/239:00 amOPO - SEA

2 stops19h 41mUnited Airlines

Sat 5/3111:11 pmSEA - OPO

2 stops23h 44mUnited Airlines

Deal found 4/27

$863

Mon 6/1611:25 amLIS - SEA

2 stops18h 48mAir Canada

Mon 6/2311:35 amSEA - LIS

1 stop15h 30mAir Canada

Deal found 4/27

$876

Best flights from Portugal to Seattle
Discover carefully curated flight deals from Portugal to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2025.

Fri 9/56:45 amLIS - SEA

1 stop15h 05mMultiple Airlines

Fri 9/194:20 pmSEA - LIS

1 stop32h 40mMultiple Airlines

Deal found 4/28

$711

Wed 9/1011:05 amLIS - SEA

1 stop18h 33mBritish Airways

Fri 9/268:20 pmSEA - LIS

1 stop18h 50mBritish Airways

Deal found 4/28

$773

Tue 6/1710:15 pmLIS - SEA

1 stop27h 35mAer Lingus

Tue 6/247:35 pmSEA - LIS

1 stop18h 00mAer Lingus

Deal found 4/27

$795

Tue 6/175:00 amLIS - SEA

1 stop14h 40mDelta

Tue 6/2411:23 amSEA - LIS

2 stops19h 27mDelta

Deal found 4/27

$815

Mon 6/27:30 pmLIS - SEA

1 stop24h 10mKLM

Mon 6/162:10 pmSEA - LIS

1 stop20h 30mKLM

Deal found 4/28

$819

Wed 6/115:05 amLIS - SEA

2 stops25h 08mUnited Airlines

Wed 6/1810:15 pmSEA - LIS

1 stop28h 15mUnited Airlines

Deal found 4/27

$838

Fri 5/236:15 amOPO - SEA

1 stop18h 44mLufthansa

Sat 5/312:15 pmSEA - OPO

1 stop24h 30mLufthansa

Deal found 4/27

$855

Sun 5/255:55 amLIS - SEA

2 stops23h 16mSWISS

Sun 6/11:45 pmSEA - LIS

2 stops25h 35mSWISS

Deal found 4/27

$861

Wed 6/1111:05 amLIS - SEA

1 stop19h 21mAmerican Airlines

Wed 6/181:30 pmSEA - LIS

1 stop16h 35mAmerican Airlines

Deal found 4/28

$868

Mon 6/1611:25 amLIS - SEA

2 stops18h 48mAir Canada

Tue 6/2411:35 amSEA - LIS

1 stop15h 30mAir Canada

Deal found 4/27

$876

Tue 9/165:55 amLIS - SEA

1 stop19h 20mTurkish Airlines

Wed 9/177:10 pmSEA - LIS

1 stop30h 30mTurkish Airlines

Deal found 4/27

$927

Sat 8/3010:00 amLIS - SEA

1 stop17h 39mVirgin Atlantic

Sat 8/3010:55 pmSEA - LIS

1 stop25h 05mVirgin Atlantic

Deal found 4/27

$970

Last-minute flights from Portugal to Seattle
Discover last-minute flight deals from Portugal to Seattle. Data last updated April 29, 2025 and is based on user searches.

Mon 5/511:05 amLIS - SEA

1 stop18h 45mBritish Airways

Sun 5/181:30 pmSEA - LIS

1 stop18h 50mBritish Airways

Deal found 4/28

$769

Mon 5/511:05 amLIS - SEA

1 stop18h 45mAmerican Airlines

Mon 5/192:20 pmSEA - LIS

2 stops24h 50mAmerican Airlines

Deal found 4/27

$817

Mon 5/55:40 amLIS - SEA

2 stops18h 27mDelta

Mon 5/197:25 amSEA - LIS

2 stops17h 25mDelta

Deal found 4/27

$826

Mon 5/510:00 pmLIS - SEA

3 stops30h 40mMultiple Airlines

Mon 5/193:45 pmSEA - LIS

2 stops19h 30mMultiple Airlines

Deal found 4/27

$967

Sun 5/1111:25 amLIS - SEA

1 stop16h 12mUnited Airlines

Wed 5/146:50 pmSEA - LIS

1 stop19h 00mUnited Airlines

Deal found 4/27

$954

Sun 5/186:15 amLIS - SEA

1 stop18h 44mLufthansa

Fri 5/236:50 pmSEA - LIS

1 stop19h 00mLufthansa

Deal found 4/27

$953

Thu 5/225:00 amLIS - SEA

1 stop18h 57mMultiple Airlines

Fri 5/306:35 pmSEA - LIS

1 stop15h 15mMultiple Airlines

Deal found 4/28

$814

Thu 5/224:10 pmLIS - SEA

2 stops27h 15mIcelandair

Thu 10/93:45 pmSEA - LIS

2 stops22h 20mIcelandair

Deal found 4/27

$2,440

Thu 5/2210:55 amLIS - SEA

1 stop38h 20mTurkish Airlines

Mon 10/67:10 pmSEA - LIS

1 stop20h 25mTurkish Airlines

Deal found 4/27

$4,629

Fri 5/236:15 amOPO - SEA

1 stop18h 44mLufthansa

Sat 5/312:15 pmSEA - OPO

1 stop24h 30mLufthansa

Deal found 4/27

$855

Fri 5/239:00 amOPO - SEA

2 stops19h 41mUnited Airlines

Sat 5/3111:11 pmSEA - OPO

2 stops23h 44mUnited Airlines

Deal found 4/27

$863

Fri 5/239:20 amOPO - SEA

2 stops21h 31mDelta

Sat 5/316:07 pmSEA - OPO

1 stop32h 33mDelta

Deal found 4/27

$938

One-way flights from Portugal to Seattle
Search for one-way flight options from Portugal to Seattle. Find affordable one-way fares based on user searches. Data last updated April 29, 2025.

Wed 5/216:30 amLIS - SEA

2 stops37h 16mMultiple Airlines

Deal found 4/28

$345

Sat 6/2111:25 amLIS - SEA

1 stop14h 25mAer Lingus

Deal found 4/28

$584

Thu 7/310:55 amLIS - SEA

1 stop38h 20mTurkish Airlines

Deal found 4/28

$678

Fri 5/306:35 amLIS - SEA

2 stops22h 28mFinnair

Deal found 4/27

$733

Fri 5/307:20 amLIS - SEA

1 stop19h 00mBritish Airways

Deal found 4/27

$740

Tue 7/298:35 amLIS - SEA

2 stops20h 05mIcelandair

Deal found 4/27

$870

Sun 5/2511:25 amLIS - SEA

1 stop16h 12mUnited Airlines

Deal found 4/28

$958

Thu 7/35:40 amLIS - SEA

2 stops20h 58mWestJet

Deal found 4/28

$965

Sat 6/285:00 amLIS - SEA

2 stops21h 29mDelta

Deal found 4/26

$1,035

Cheapflights Fare Finder

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

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 9/5

6:45 am-1:50 pm

1 stop15h 05m

Seattle/Tacoma Intl

Fri 9/19

4:20 pm-9:00 am

1 stop32h 40m

$711

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 9/10

11:05 am-9:38 pm

1 stop18h 33m

Seattle/Tacoma Intl

Fri 9/26

8:20 pm-11:10 pm

1 stop18h 50m

$773

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Tue 6/17

10:15 pm-5:50 pm

1 stop27h 35m

Seattle/Tacoma Intl

Tue 6/24

7:35 pm-9:35 pm

1 stop18h 00m

$795

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Tue 6/17

5:00 am-11:40 am

1 stop14h 40m

Seattle/Tacoma Intl

Tue 6/24

11:23 am-2:50 pm

2 stops19h 27m

$815

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Mon 6/2

7:30 pm-11:40 am

1 stop24h 10m

Seattle/Tacoma Intl

Mon 6/16

2:10 pm-6:40 pm

1 stop20h 30m

$819

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 6/12

8:20 pm-11:40 am

1 stop23h 20m

Seattle/Tacoma Intl

Thu 6/19

2:10 pm-10:15 pm

1 stop24h 05m

$835

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 6/11

5:05 am-10:13 pm

2 stops25h 08m

Seattle/Tacoma Intl

Wed 6/18

10:15 pm-10:30 am

1 stop28h 15m

$838

PortoSeattle

OPO - SEA

OPOSEA

Porto

Fri 5/23

6:15 am-4:59 pm

1 stop18h 44m

Seattle/Tacoma Intl

Sat 5/31

2:15 pm-10:45 pm

1 stop24h 30m

$855

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sun 5/25

5:55 am-9:11 pm

2 stops23h 16m

Seattle/Tacoma Intl

Sun 6/1

1:45 pm-11:20 pm

2 stops25h 35m

$861

PortoSeattle

OPO - SEA

OPOSEA

Porto

Fri 5/23

9:00 am-8:41 pm

2 stops19h 41m

Seattle/Tacoma Intl

Sat 5/31

11:11 pm-6:55 am

2 stops23h 44m

$863

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 31 results

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 $405). 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?

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

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

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

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

7,929 reviews

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

7,929 reviews

Delta

8.0

Very good

7,929 reviews

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

7,929 reviews

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

1,273 reviews

Delta

8.0

Very good

7,929 reviews

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

1,587 reviews

Delta

8.0

Very good

7,929 reviews

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

United Airlines

7.4

Good

8,696 reviews

Delta

8.0

Very good

7,929 reviews

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

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?
$584 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 Turkish Airlines and Finnair, with prices starting from $678 and $733, 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 $405). 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

SeaTac

Tukwila

Tacoma

Renton

Lakewood

Ocean Shores

Lacey

Leavenworth

Federal Way

Olympia

Shoreline

Cle Elum

Centralia

Kent

Aberdeen

Lynnwood

Shelton

Silverdale

Redmond

Issaquah

Browse thousands of different options on Cheapflights for your next trip

Top 6 airlines flying from Portugal to Seattle

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$717	Average$823	FlexibilityNo cancel fee	On-time71%
British Airways	Cheapest$720	Average$1,084	FlexibilityNo cancel fee	On-time70%
United Airlines	Cheapest$738	Average$867	FlexibilityNo cancel fee	On-time69%
KLM	Cheapest$756	Average$848	FlexibilityNo cancel fee	On-time75%
Air France	Cheapest$762	Average$1,067	FlexibilityNo cancel fee	On-time77%
Delta	Cheapest$765	Average$859	FlexibilityNo cancel fee	On-timeN/A

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$345+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portugal to Seattle with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

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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 April 29, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portugal to Seattle

Cheapest flights from Portugal to SeattleExplore 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 April 29, 2025.

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 April 29, 2025.

Cheapflights Fare Finder

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

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.

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?

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 April 29, 2025.

Rainfall in Seattle by month

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

Temperature in Seattle by month

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

Reviews of airlines servicing Seattle

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.

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?

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

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

How can I find direct flights from Portugal to Seattle?

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

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

Traveling to a place near Portugal?

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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.

Top 6 airlines flying from Portugal to Seattle

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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 April 29, 2025.