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Cheap flights from Portugal to Seattle from $391

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 9/14. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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.
Scandinavian Airlines Logo
10:55 pm - 1:45 pm
LIS
-
SEA
22h 50m
1 stop
Scandinavian Airlines Logo
3:55 pm - 10:05 pm
SEA
-
LIS
22h 10m
1 stop
$770Scandinavian Airlines
Sat, Aug 29 - Fri, Sep 11
Scandinavian Airlines Logo
10:55 pm - 1:45 pm
LIS
-
SEA
22h 50m
1 stop
Scandinavian Airlines Logo
3:55 pm - 10:05 pm
SEA
-
LIS
22h 10m
1 stop
$799Scandinavian Airlines
Sat, Aug 29 - Fri, Sep 11
Multiple Airlines Logo
7:00 am - 9:00 pm
LIS
-
SEA
46h 00m
3 stops
Multiple Airlines Logo
3:40 pm - 11:25 pm
SEA
-
LIS
23h 45m
2 stops
$812Multiple Airlines
Sat, Sep 5 - Fri, Sep 18
Scandinavian Airlines Logo
10:55 pm - 1:45 pm
LIS
-
SEA
22h 50m
1 stop
Scandinavian Airlines Logo
3:55 pm - 10:05 pm
SEA
-
LIS
22h 10m
1 stop
$815Scandinavian Airlines
Sat, Aug 29 - Fri, Sep 11
Scandinavian Airlines Logo
10:55 pm - 1:45 pm
LIS
-
SEA
22h 50m
1 stop
Scandinavian Airlines Logo
3:55 pm - 10:05 pm
SEA
-
LIS
22h 10m
1 stop
$820Scandinavian Airlines
Sat, Sep 5 - Fri, Sep 18
Scandinavian Airlines Logo
10:55 pm - 1:45 pm
LIS
-
SEA
22h 50m
1 stop
Scandinavian Airlines Logo
3:55 pm - 10:05 pm
SEA
-
LIS
22h 10m
1 stop
$821Scandinavian Airlines
Sat, Sep 5 - Fri, Sep 18
Scandinavian Airlines Logo
10:55 pm - 1:45 pm
LIS
-
SEA
22h 50m
1 stop
Scandinavian Airlines Logo
3:55 pm - 10:05 pm
SEA
-
LIS
22h 10m
1 stop
$823Scandinavian Airlines
Sat, Aug 29 - Fri, Sep 11
Scandinavian Airlines Logo
10:55 pm - 1:45 pm
LIS
-
SEA
22h 50m
1 stop
Scandinavian Airlines Logo
3:55 pm - 10:05 pm
SEA
-
LIS
22h 10m
1 stop
$827Scandinavian Airlines
Sat, Aug 29 - Fri, Sep 11
Delta Logo
5:00 am - 4:27 pm
OPO
-
SEA
19h 27m
1 stop
Delta Logo
6:45 pm - 10:00 pm
SEA
-
OPO
19h 15m
1 stop
$939Delta
Sat, Aug 29 - Sat, Sep 5
Delta Logo
5:00 am - 11:47 am
OPO
-
SEA
14h 47m
1 stop
Delta Logo
7:15 am - 10:40 am
SEA
-
OPO
19h 25m
2 stops
$945Delta
Fri, Sep 11 - Fri, Sep 18

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Turkish Airlines flights from Portugal to Seattle

Our best Turkish Airlines deals on Portugal to Seattle flight tickets
Turkish Airlines
Nov 4
LIS6:00 amLisbon Humberto Delgado
48h 59m
2 stops
SEA10:59 pmSeattle/Tacoma Intl
Nov 12
SEA10:50 amSeattle/Tacoma Intl
39h 45m
2 stops
LIS10:35 amLisbon Humberto Delgado
$907
Turkish Airlines
Sep 10
LIS10:50 amLisbon Humberto Delgado
43h 55m
2 stops
SEA10:45 pmSeattle/Tacoma Intl
Sep 23
SEA10:42 amSeattle/Tacoma Intl
45h 03m
2 stops
LIS3:45 pmLisbon Humberto Delgado
$916
Turkish Airlines
Aug 14
OPO10:40 amPorto
32h 00m
1 stop
SEA10:40 amSeattle/Tacoma Intl
Aug 18
SEA7:15 pmSeattle/Tacoma Intl
30h 45m
1 stop
OPO10:00 amPorto
$1,266

Delta flights from Portugal to Seattle

Our best Delta deals on Portugal to Seattle flight tickets
Delta
Aug 29
OPO5:00 amPorto
19h 27m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
Sep 5
SEA6:45 pmSeattle/Tacoma Intl
19h 15m
1 stop
OPO10:00 pmPorto
$939
Delta
Aug 29
OPO5:00 amPorto
21h 44m
2 stops
SEA6:44 pmSeattle/Tacoma Intl
Sep 5
SEA6:45 pmSeattle/Tacoma Intl
19h 15m
1 stop
OPO10:00 pmPorto
$945
Delta
Sep 5
LIS5:00 amLisbon Humberto Delgado
14h 47m
1 stop
SEA11:47 amSeattle/Tacoma Intl
Sep 18
SEA7:15 amSeattle/Tacoma Intl
20h 00m
2 stops
LIS11:15 amLisbon Humberto Delgado
$947

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 August 1, 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

Sat 8/29

10:55 pm-1:45 pm

1 stop22h 50m

Seattle/Tacoma Intl

Fri 9/11

3:55 pm-10:05 pm

1 stop22h 10m

$770

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 8/29

10:55 pm-1:45 pm

1 stop22h 50m

Seattle/Tacoma Intl

Fri 9/11

3:55 pm-10:05 pm

1 stop22h 10m

$799

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 9/5

7:00 am-9:00 pm

3 stops46h 00m

Seattle/Tacoma Intl

Fri 9/18

3:40 pm-11:25 pm

2 stops23h 45m

$812

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 8/29

10:55 pm-1:45 pm

1 stop22h 50m

Seattle/Tacoma Intl

Fri 9/11

3:55 pm-10:05 pm

1 stop22h 10m

$815

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 9/5

10:55 pm-1:45 pm

1 stop22h 50m

Seattle/Tacoma Intl

Fri 9/18

3:55 pm-10:05 pm

1 stop22h 10m

$820

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 9/5

10:55 pm-1:45 pm

1 stop22h 50m

Seattle/Tacoma Intl

Fri 9/18

3:55 pm-10:05 pm

1 stop22h 10m

$821

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 8/29

10:55 pm-1:45 pm

1 stop22h 50m

Seattle/Tacoma Intl

Fri 9/11

3:55 pm-10:05 pm

1 stop22h 10m

$823

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 8/29

10:55 pm-1:45 pm

1 stop22h 50m

Seattle/Tacoma Intl

Fri 9/11

3:55 pm-10:05 pm

1 stop22h 10m

$827

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sat 8/29

5:00 am-4:27 pm

1 stop19h 27m

Seattle/Tacoma Intl

Sat 9/5

6:45 pm-10:00 pm

1 stop19h 15m

$939
Quickest round-trip

PortoSeattle

OPO - SEA

OPOSEA

Porto

Fri 9/11

5:00 am-11:47 am

1 stop14h 47m

Seattle/Tacoma Intl

Fri 9/18

7:15 am-10:40 am

2 stops19h 25m

$945

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 $897. 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 $924.

Can stopping save me money on Portugal to Seattle flights?

You could potentially save up to 7% 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

14h 50m

Direct flights

None
The fastest flight from Portugal to Seattle takes 14h 50m
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
DeltaPriceFrom $1,041Free CancellationRating
7.8
8,497 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
Kent
Lynnwood
Redmond
Lakewood
Puyallup
Tukwila
Federal Way
Fife
Cle Elum
Marysville
Kirkland
Centralia
Shoreline
Lacey

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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