Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Portugal from $272

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 5/4. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Seattle to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
3:55 pm - 3:35 pm
SEA
-
LIS
15h 40m
1 stop
Scandinavian Airlines Logo
4:25 pm - 1:45 pm
LIS
-
SEA
29h 20m
1 stop
$626Scandinavian Airlines
Tue, Sep 29 - Sat, Oct 10
Scandinavian Airlines Logo
3:55 pm - 3:35 pm
SEA
-
LIS
15h 40m
1 stop
Scandinavian Airlines Logo
4:25 pm - 1:45 pm
LIS
-
SEA
29h 20m
1 stop
$654Scandinavian Airlines
Tue, Sep 8 - Sat, Sep 12
Turkish Airlines Logo
7:10 pm - 11:35 pm
SEA
-
LIS
20h 25m
1 stop
Turkish Airlines Logo
5:05 pm - 5:15 pm
LIS
-
SEA
32h 10m
1 stop
$661Turkish Airlines
Mon, Sep 21 - Thu, Oct 1
Turkish Airlines Logo
7:10 pm - 9:50 am
SEA
-
LIS
30h 40m
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
KLM Logo
5:35 pm - 9:15 am
SEA
-
FNC
31h 40m
1 stop
KLM Logo
10:25 am - 4:30 pm
FNC
-
SEA
38h 05m
1 stop
$791KLM
Tue, May 5 - Wed, May 13
KLM Logo
5:35 pm - 9:15 am
SEA
-
FNC
31h 40m
1 stop
KLM Logo
10:25 am - 12:12 am
FNC
-
SEA
21h 47m
2 stops
$801KLM
Tue, May 5 - Wed, May 13
British Airways Logo
8:20 pm - 11:30 am
SEA
-
FNC
31h 10m
1 stop
British Airways Logo
7:35 pm - 11:35 am
FNC
-
SEA
24h 00m
1 stop
$917British Airways
Sun, Sep 20 - Tue, Sep 29
British Airways Logo
1:30 pm - 6:05 pm
SEA
-
FNC
20h 35m
1 stop
British Airways Logo
12:10 pm - 11:35 am
FNC
-
SEA
31h 25m
1 stop
$967British Airways
Sun, Sep 20 - Wed, Sep 30
United Airlines Logo
8:56 am - 8:40 am
SEA
-
PDL
16h 44m
2 stops
United Airlines Logo
9:35 am - 3:51 pm
PDL
-
SEA
37h 16m
2 stops
$1,021United Airlines
Thu, Aug 6 - Fri, Aug 21
United Airlines Logo
1:05 pm - 8:40 am
SEA
-
PDL
12h 35m
1 stop
United Airlines Logo
9:35 am - 9:07 pm
PDL
-
SEA
18h 32m
1 stop
$1,034United Airlines
Thu, Aug 6 - Fri, Aug 21

Turkish Airlines flights from Seattle to Portugal

Our best Turkish Airlines deals on Seattle to Portugal flight tickets
Turkish Airlines
Sep 21
SEA7:10 pmSeattle/Tacoma Intl
20h 25m
1 stop
LIS11:35 pmLisbon Humberto Delgado
Oct 1
LIS5:05 pmLisbon Humberto Delgado
32h 10m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$661
Turkish Airlines
Aug 25
SEA7:10 pmSeattle/Tacoma Intl
30h 40m
1 stop
LIS9:50 amLisbon Humberto Delgado
Sep 16
LIS5:55 amLisbon Humberto Delgado
19h 20m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$663
Turkish Airlines
Aug 31
SEA12:35 pmSeattle/Tacoma Intl
27h 00m
1 stop
LIS11:35 pmLisbon Humberto Delgado
Sep 15
LIS5:05 pmLisbon Humberto Delgado
32h 10m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$672

Delta flights from Seattle to Portugal

Our best Delta deals on Seattle to Portugal flight tickets
Delta
Apr 20
SEA1:45 pmSeattle/Tacoma Intl
20h 05m
2 stops
LIS5:50 pmLisbon Humberto Delgado
May 8
LIS5:00 amLisbon Humberto Delgado
14h 42m
1 stop
SEA11:42 amSeattle/Tacoma Intl
$719
Delta
Apr 22
SEA6:00 amSeattle/Tacoma Intl
20h 55m
2 stops
LIS10:55 amLisbon Humberto Delgado
Apr 30
LIS5:00 amLisbon Humberto Delgado
14h 40m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$723
Delta
Apr 12
SEA7:15 amSeattle/Tacoma Intl
19h 40m
2 stops
LIS10:55 amLisbon Humberto Delgado
Apr 22
LIS5:00 amLisbon Humberto Delgado
14h 45m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$724

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 9, 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

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 9/29

3:55 pm-3:35 pm

1 stop15h 40m

Lisbon Humberto Delgado

Sat 10/10

4:25 pm-1:45 pm

1 stop29h 20m

$626

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 9/8

3:55 pm-3:35 pm

1 stop15h 40m

Lisbon Humberto Delgado

Sat 9/12

4:25 pm-1:45 pm

1 stop29h 20m

$654

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 9/21

7:10 pm-11:35 pm

1 stop20h 25m

Lisbon Humberto Delgado

Thu 10/1

5:05 pm-5:15 pm

1 stop32h 10m

$661

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 8/25

7:10 pm-9:50 am

1 stop30h 40m

Lisbon Humberto Delgado

Wed 9/16

5:55 am-5:15 pm

1 stop19h 20m

$663

SeattleFunchal

SEA - FNC

SEAFNC

Seattle/Tacoma Intl

Tue 5/5

5:35 pm-9:15 am

1 stop31h 40m

Funchal Madeira

Wed 5/13

10:25 am-4:30 pm

1 stop38h 05m

$791

SeattleFunchal

SEA - FNC

SEAFNC

Seattle/Tacoma Intl

Tue 5/5

5:35 pm-9:15 am

1 stop31h 40m

Funchal Madeira

Wed 5/13

10:25 am-12:12 am

2 stops21h 47m

$801

SeattleFunchal

SEA - FNC

SEAFNC

Seattle/Tacoma Intl

Sun 9/20

8:20 pm-11:30 am

1 stop31h 10m

Funchal Madeira

Tue 9/29

7:35 pm-11:35 am

1 stop24h 00m

$917

SeattleFunchal

SEA - FNC

SEAFNC

Seattle/Tacoma Intl

Sun 9/20

1:30 pm-6:05 pm

1 stop20h 35m

Funchal Madeira

Wed 9/30

12:10 pm-11:35 am

1 stop31h 25m

$967

SeattlePonta Delgada

SEA - PDL

SEAPDL

Seattle/Tacoma Intl

Thu 8/6

8:56 am-8:40 am

2 stops16h 44m

Ponta Delgada Nordela

Fri 8/21

9:35 am-3:51 pm

2 stops37h 16m

$1,021
Quickest round-trip

SeattlePonta Delgada

SEA - PDL

SEAPDL

Seattle/Tacoma Intl

Thu 8/6

1:05 pm-8:40 am

1 stop12h 35m

Ponta Delgada Nordela

Fri 8/21

9:35 am-9:07 pm

1 stop18h 32m

$1,034

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $723 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

15h 10m

Direct flights

None
The fastest flight from Seattle to Portugal takes 15h 10m
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
631 reviews
Search Icelandair flights
KLMPriceFrom $481Free CancellationRating
7.7
1,492 reviews
Search KLM flights
British AirwaysPriceFrom $482Free CancellationRating
6.7
7,863 reviews
Search British Airways flights
LufthansaPriceFrom $484Free CancellationRating
6.8
7,898 reviews
Search Lufthansa flights
United AirlinesPriceFrom $494Free CancellationRating
7.4
9,552 reviews
Search United Airlines flights
Air FrancePriceFrom $530Free CancellationRating
7.4
1,564 reviews
Search Air France flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
10,905 reviews
Search Air Canada flights
DeltaPriceFrom $545Free CancellationRating
7.9
8,388 reviews
Search Delta flights
Aer LingusPriceFrom $553Free CancellationRating
7.2
1,499 reviews
Search Aer Lingus flights
American AirlinesPriceFrom $558Free CancellationRating
7.1
11,554 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 5/9
Sat 5/16
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo
Flights to Lisbonfrom $430
Flights to Portofrom $424
Flights to Funchalfrom $520
Flights to Farofrom $610
Flights to Ponta Delgadafrom $595
Flights to Lajesfrom $653
Flights to Pico Islandfrom $787
Flights to Hortafrom $638
Flights to Porto Santofrom $885
Flights to Velasfrom $778