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Cheap flights from Seattle to Portugal from $269

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Portugal departing on 4/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Seattle to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
7:00 pm - 12:50 pm
SEA
-
FAO
33h 50m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
FAO
-
SEA
14h 50m
1 stop
$438Icelandair
Sat, Apr 18 - Fri, May 1
Lufthansa Logo
2:10 pm - 2:30 pm
SEA
-
FAO
16h 20m
1 stop
Lufthansa Logo
3:55 pm - 12:20 pm
FAO
-
SEA
28h 25m
2 stops
$618Lufthansa
Thu, Apr 16 - Thu, Apr 23
Turkish Airlines Logo
7:10 pm - 11:20 pm
SEA
-
LIS
20h 10m
1 stop
Turkish Airlines Logo
5:05 pm - 5:15 pm
LIS
-
SEA
32h 10m
1 stop
$662Turkish Airlines
Tue, Sep 8 - Tue, Sep 29
Turkish Airlines Logo
7:10 pm - 11:20 pm
SEA
-
LIS
20h 10m
1 stop
Turkish Airlines Logo
5:55 am - 5:15 pm
LIS
-
SEA
19h 20m
1 stop
$663Turkish Airlines
Tue, Aug 25 - Wed, Sep 16
Aer Lingus Logo
7:10 pm - 9:35 pm
SEA
-
LIS
18h 25m
1 stop
Aer Lingus Logo
10:15 pm - 5:10 pm
LIS
-
SEA
26h 55m
1 stop
$674Aer Lingus
Mon, Apr 13 - Tue, Apr 21
Aer Lingus Logo
7:10 pm - 9:35 pm
SEA
-
LIS
18h 25m
1 stop
Aer Lingus Logo
10:15 pm - 5:10 pm
LIS
-
SEA
26h 55m
1 stop
$699Aer Lingus
Mon, Apr 13 - Tue, Apr 21
British Airways Logo
8:20 pm - 12:25 pm
SEA
-
FNC
32h 05m
1 stop
British Airways Logo
12:25 pm - 11:35 am
FNC
-
SEA
31h 10m
1 stop
$788British Airways
Tue, Apr 28 - Tue, May 5
British Airways Logo
8:20 pm - 12:25 pm
SEA
-
FNC
32h 05m
1 stop
British Airways Logo
7:35 pm - 10:38 pm
FNC
-
SEA
35h 03m
2 stops
$797British Airways
Tue, Apr 28 - Tue, May 5
United Airlines Logo
7:00 am - 1:50 pm
SEA
-
FAO
22h 50m
2 stops
United Airlines Logo
11:40 am - 7:36 pm
FAO
-
SEA
15h 56m
1 stop
$831United Airlines
Tue, Apr 28 - Thu, May 21
United Airlines Logo
7:00 am - 1:50 pm
SEA
-
FAO
22h 50m
2 stops
United Airlines Logo
11:40 am - 8:00 am
FAO
-
SEA
28h 20m
2 stops
$836United Airlines
Tue, Apr 28 - Thu, May 21

Delta flights from Seattle to Portugal

Our best Delta deals on Seattle to Portugal flight tickets
Delta
Apr 27
SEA11:10 amSeattle/Tacoma Intl
19h 45m
2 stops
LIS2:55 pmLisbon Humberto Delgado
May 4
LIS5:00 amLisbon Humberto Delgado
14h 42m
1 stop
SEA11:42 amSeattle/Tacoma Intl
$710
Delta
Apr 20
SEA6:40 pmSeattle/Tacoma Intl
15h 10m
1 stop
LIS5:50 pmLisbon Humberto Delgado
Apr 28
LIS5:00 amLisbon Humberto Delgado
19h 30m
1 stop
SEA4:30 pmSeattle/Tacoma Intl
$714
Delta
May 2
SEA6:40 pmSeattle/Tacoma Intl
15h 10m
1 stop
LIS5:50 pmLisbon Humberto Delgado
May 9
LIS5:00 amLisbon Humberto Delgado
19h 01m
2 stops
SEA4:01 pmSeattle/Tacoma Intl
$716

SWISS flights from Seattle to Portugal

Our best SWISS deals on Seattle to Portugal flight tickets
SWISS
Apr 13
SEA7:00 amSeattle/Tacoma Intl
32h 25m
2 stops
LIS11:25 pmLisbon Humberto Delgado
Apr 29
LIS5:55 amLisbon Humberto Delgado
23h 02m
2 stops
SEA8:57 pmSeattle/Tacoma Intl
$705
SWISS
Apr 27
SEA7:00 amSeattle/Tacoma Intl
40h 55m
2 stops
OPO7:55 amPorto
May 8
OPO8:40 amPorto
22h 07m
2 stops
SEA10:47 pmSeattle/Tacoma Intl
$868
SWISS
Apr 29
SEA7:00 amSeattle/Tacoma Intl
26h 40m
2 stops
FAO5:40 pmFaro
May 19
FAO7:05 pmFaro
36h 24m
2 stops
SEA11:29 pmSeattle/Tacoma Intl
$898

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Portugal 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 3, 2026.
Use the filters below to find and compare flights from Seattle to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleFaro

SEA - FAO

SEAFAO

Seattle/Tacoma Intl

Sat 4/18

7:00 pm-12:50 pm

1 stop33h 50m

Faro

Fri 5/1

1:50 pm-8:40 pm

1 stop14h 50m

$438

SeattleFaro

SEA - FAO

SEAFAO

Seattle/Tacoma Intl

Thu 4/16

2:10 pm-2:30 pm

1 stop16h 20m

Faro

Thu 4/23

3:55 pm-12:20 pm

2 stops28h 25m

$618

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 9/8

7:10 pm-11:20 pm

1 stop20h 10m

Lisbon Humberto Delgado

Tue 9/29

5:05 pm-5:15 pm

1 stop32h 10m

$662

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 8/25

7:10 pm-11:20 pm

1 stop20h 10m

Lisbon Humberto Delgado

Wed 9/16

5:55 am-5:15 pm

1 stop19h 20m

$663

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 4/13

7:10 pm-9:35 pm

1 stop18h 25m

Lisbon Humberto Delgado

Tue 4/21

10:15 pm-5:10 pm

1 stop26h 55m

$674

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 4/13

7:10 pm-9:35 pm

1 stop18h 25m

Lisbon Humberto Delgado

Tue 4/21

10:15 pm-5:10 pm

1 stop26h 55m

$699

SeattleFunchal

SEA - FNC

SEAFNC

Seattle/Tacoma Intl

Tue 4/28

8:20 pm-12:25 pm

1 stop32h 05m

Funchal Madeira

Tue 5/5

12:25 pm-11:35 am

1 stop31h 10m

$788

SeattleFunchal

SEA - FNC

SEAFNC

Seattle/Tacoma Intl

Tue 4/28

8:20 pm-12:25 pm

1 stop32h 05m

Funchal Madeira

Tue 5/5

7:35 pm-10:38 pm

2 stops35h 03m

$797
Quickest round-trip

SeattleFaro

SEA - FAO

SEAFAO

Seattle/Tacoma Intl

Tue 4/28

7:00 am-1:50 pm

2 stops22h 50m

Faro

Thu 5/21

11:40 am-7:36 pm

1 stop15h 56m

$831

SeattleFaro

SEA - FAO

SEAFAO

Seattle/Tacoma Intl

Tue 4/28

7:00 am-1:50 pm

2 stops22h 50m

Faro

Thu 5/21

11:40 am-8:00 am

2 stops28h 20m

$836

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 Portugal from

How to get the cheapest flight ticket from Seattle to Portugal

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 Portugal?

The cheapest month to fly to Portugal from Seattle is in January. Flight prices, which tend to average around $492, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Portugal from Seattle during February instead. Flights to Portugal in February, while not as cheap as those in January, still average around $552.

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

You are more likely to see cheaper flights to Portugal from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $814 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Seattle for as low as $739 on momondo.

Can stopping save me money on Seattle to Portugal flights?

You could potentially save up to 29% on your flight if you consider stops on a Seattle to Portugal flight.

Cheap Seattle to Portugal flight deals and tips

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

Fastest flight time

14h 30m

Direct flights

None
The fastest flight from Seattle to Portugal takes 14h 30m
There are no direct flights from Seattle to Portugal. There are no popular flight routes from Seattle to Portugal.
Search flight deals

Frequently asked questions about flying from Seattle to Portugal

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

    Prices for flights from Seattle/Tacoma Intl Airport to Portugal were last updated today.

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

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

    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 Seattle/Tacoma Intl Airport to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The necessary travel and health documents for your Portugal 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 Seattle to Portugal

Compare and see reviews for airlines that fly from Seattle to Portugal with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $348Free CancellationRating
7.0
630 reviews
Search Icelandair flights
KLMPriceFrom $481Free CancellationRating
7.7
1,485 reviews
Search KLM flights
British AirwaysPriceFrom $482Free CancellationRating
6.7
7,843 reviews
Search British Airways flights
LufthansaPriceFrom $484Free CancellationRating
6.8
7,885 reviews
Search Lufthansa flights
United AirlinesPriceFrom $494Free CancellationRating
7.4
9,538 reviews
Search United Airlines flights
Air FrancePriceFrom $530Free CancellationRating
7.4
1,562 reviews
Search Air France flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
10,884 reviews
Search Air Canada flights
DeltaPriceFrom $545Free CancellationRating
7.9
8,374 reviews
Search Delta flights
Aer LingusPriceFrom $553Free CancellationRating
7.2
1,496 reviews
Search Aer Lingus flights
American AirlinesPriceFrom $558Free CancellationRating
7.1
11,553 reviews
Search American Airlines flights

Why use momondo?

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

It is quick and easy to find Seattle to Portugal flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Portugal that suits you.

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

All flight searches from Seattle to Portugal on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Portugal.

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

If you are simply researching potential flights to Portugal, momondo offers a useful price alert feature which will track prices for flights to Portugal from Seattle and alert you when they change.

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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Find better results for your trip to Portugal

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Popular flights according to clicks in the last 7 days on momondo
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