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Cheap flights from Portugal to Seattle from $404

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to Seattle departing on 5/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Portugal to Seattle

Recent round-trip flight deals from Portugal to Seattle

Enter your travel dates to find the best prices.
Aer Lingus Logo
10:15 pm - 5:10 pm
LIS
-
SEA
26h 55m
1 stop
Aer Lingus Logo
7:10 pm - 9:35 pm
SEA
-
LIS
18h 25m
1 stop
$752Aer Lingus
Fri, May 1 - Sat, May 16
Aer Lingus Logo
10:15 pm - 5:10 pm
LIS
-
SEA
26h 55m
1 stop
Aer Lingus Logo
7:10 pm - 9:35 pm
SEA
-
LIS
18h 25m
1 stop
$758Aer Lingus
Fri, May 1 - Sat, May 16
Aer Lingus Logo
10:15 pm - 5:10 pm
LIS
-
SEA
26h 55m
1 stop
Aer Lingus Logo
7:10 pm - 9:35 pm
SEA
-
LIS
18h 25m
1 stop
$760Aer Lingus
Fri, May 22 - Fri, Jun 5
Multiple Airlines Logo
10:10 pm - 5:10 pm
LIS
-
SEA
27h 00m
2 stops
Multiple Airlines Logo
7:10 pm - 9:55 pm
SEA
-
LIS
18h 45m
1 stop
$806Multiple Airlines
Fri, May 1 - Sat, May 16
Multiple Airlines Logo
9:25 am - 5:10 pm
LIS
-
SEA
15h 45m
1 stop
Multiple Airlines Logo
7:10 pm - 9:55 pm
SEA
-
LIS
18h 45m
1 stop
$814Multiple Airlines
Thu, May 28 - Thu, Jun 4
Multiple Airlines Logo
9:15 pm - 5:10 pm
LIS
-
SEA
27h 55m
2 stops
Multiple Airlines Logo
7:10 pm - 9:55 pm
SEA
-
LIS
18h 45m
1 stop
$824Multiple Airlines
Fri, May 1 - Sat, May 16
Multiple Airlines Logo
9:50 am - 9:40 am
OPO
-
SEA
31h 50m
2 stops
Multiple Airlines Logo
3:40 pm - 8:00 am
SEA
-
OPO
32h 20m
3 stops
$854Multiple Airlines
Thu, Apr 30 - Mon, May 4
Scandinavian Airlines Logo
9:15 pm - 11:55 pm
LIS
-
SEA
34h 40m
2 stops
Scandinavian Airlines Logo
3:55 pm - 3:35 pm
SEA
-
LIS
15h 40m
1 stop
$870Scandinavian Airlines
Fri, May 22 - Fri, Jun 5
Scandinavian Airlines Logo
9:15 pm - 11:55 pm
LIS
-
SEA
34h 40m
2 stops
Scandinavian Airlines Logo
3:55 pm - 3:35 pm
SEA
-
LIS
15h 40m
1 stop
$871Scandinavian Airlines
Fri, May 22 - Fri, Jun 5
Multiple Airlines Logo
5:00 am - 8:40 pm
OPO
-
SEA
23h 40m
3 stops
Multiple Airlines Logo
3:40 pm - 8:00 am
SEA
-
OPO
32h 20m
3 stops
$891Multiple Airlines
Thu, Apr 30 - Mon, May 4

Air Canada flights from Portugal to Seattle

Our best Air Canada deals on Portugal to Seattle flight tickets
Air Canada
May 6
OPO6:00 amPorto
24h 40m
2 stops
SEA10:40 pmSeattle/Tacoma Intl
May 10
SEA5:50 amSeattle/Tacoma Intl
28h 25m
2 stops
OPO6:15 pmPorto
$1,007
Air Canada
May 6
OPO6:00 amPorto
36h 05m
2 stops
SEA10:05 amSeattle/Tacoma Intl
May 10
SEA10:45 amSeattle/Tacoma Intl
23h 30m
2 stops
OPO6:15 pmPorto
$1,012
Air Canada
May 6
OPO6:00 amPorto
20h 30m
2 stops
SEA6:30 pmSeattle/Tacoma Intl
May 10
SEA10:45 amSeattle/Tacoma Intl
23h 30m
2 stops
OPO6:15 pmPorto
$1,013

Turkish Airlines flights from Portugal to Seattle

Our best Turkish Airlines deals on Portugal to Seattle flight tickets
Turkish Airlines
Jul 1
OPO10:45 amPorto
31h 55m
1 stop
SEA10:40 amSeattle/Tacoma Intl
Jul 15
SEA7:10 pmSeattle/Tacoma Intl
30h 30m
1 stop
OPO9:40 amPorto
$1,071
Turkish Airlines
Jul 1
OPO10:45 amPorto
31h 55m
1 stop
SEA10:40 amSeattle/Tacoma Intl
Jul 15
SEA7:10 pmSeattle/Tacoma Intl
30h 30m
1 stop
OPO9:40 amPorto
$1,074
Turkish Airlines
Aug 11
OPO10:40 amPorto
38h 35m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
Sep 30
SEA7:10 pmSeattle/Tacoma Intl
30h 30m
1 stop
OPO9:40 amPorto
$1,139

momondo 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, momondo users made 832,500 searches. Data last updated April 17, 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 5/1

10:15 pm-5:10 pm

1 stop26h 55m

Seattle/Tacoma Intl

Sat 5/16

7:10 pm-9:35 pm

1 stop18h 25m

$752

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 5/1

10:15 pm-5:10 pm

1 stop26h 55m

Seattle/Tacoma Intl

Sat 5/16

7:10 pm-9:35 pm

1 stop18h 25m

$758

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 5/22

10:15 pm-5:10 pm

1 stop26h 55m

Seattle/Tacoma Intl

Fri 6/5

7:10 pm-9:35 pm

1 stop18h 25m

$760

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 5/1

10:10 pm-5:10 pm

2 stops27h 00m

Seattle/Tacoma Intl

Sat 5/16

7:10 pm-9:55 pm

1 stop18h 45m

$806
Quickest round-trip

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 5/28

9:25 am-5:10 pm

1 stop15h 45m

Seattle/Tacoma Intl

Thu 6/4

7:10 pm-9:55 pm

1 stop18h 45m

$814

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 5/1

9:15 pm-5:10 pm

2 stops27h 55m

Seattle/Tacoma Intl

Sat 5/16

7:10 pm-9:55 pm

1 stop18h 45m

$824

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 4/30

9:50 am-9:40 am

2 stops31h 50m

Seattle/Tacoma Intl

Mon 5/4

3:40 pm-8:00 am

3 stops32h 20m

$854

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 5/22

9:15 pm-11:55 pm

2 stops34h 40m

Seattle/Tacoma Intl

Fri 6/5

3:55 pm-3:35 pm

1 stop15h 40m

$870

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 5/22

9:15 pm-11:55 pm

2 stops34h 40m

Seattle/Tacoma Intl

Fri 6/5

3:55 pm-3:35 pm

1 stop15h 40m

$871

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 4/30

5:00 am-8:40 pm

3 stops23h 40m

Seattle/Tacoma Intl

Mon 5/4

3:40 pm-8:00 am

3 stops32h 20m

$891

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Portugal to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

In general, February is the cheapest month to fly from Portugal to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $825. If you don’t want to visit Seattle in February, then you should wait until October to fly from Portugal, when ticket prices are also cheap, with an average price of $871.

Can stopping save me money on Portugal to Seattle flights?

You could potentially save up to 2% on your flight if you consider stops on a Portugal to Seattle flight.

Cheap Portugal to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portugal to Seattle

Fastest flight time

19h 05m

Direct flights

None
The fastest flight from Portugal to Seattle takes 19h 05m
There are no direct flights from Portugal to Seattle. There are no popular flight routes from Portugal to Seattle.
Search flight deals

Frequently asked questions about flying from Portugal to Seattle

  • When did momondo last update prices for flights from Portugal to Seattle/Tacoma Intl Airport?

    Prices for flights from Portugal to Seattle/Tacoma Intl Airport are updated daily.

  • How many operators does momondo search for flights from Portugal to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Portugal to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portugal to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Portugal to Seattle

Compare and see reviews for airlines that fly from Portugal to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Air FrancePriceFrom $770Free CancellationRating
7.4
1,572 reviews
Search Air France flights
DeltaPriceFrom $775Free CancellationRating
7.9
8,412 reviews
Search Delta flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Redmond
Marysville
Lakewood
Tukwila
Puyallup
Cle Elum
Federal Way
Centralia
Fife
Westport
Shoreline
Tumwater

Why use momondo?

Why should I use momondo to find a flight deal from Portugal to Seattle?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Portugal to Seattle for you.

Can I find flights from Portugal to Seattle with flexible booking policies on momondo?

Yes. All flights to Seattle from Portugal on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Portugal to Seattle?

Once all potential Portugal to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Portugal to Seattle right now. Can momondo alert me if prices change?

Price alerts on flights to Seattle from Portugal are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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