Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Portugal from $325

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
2:35 pm - 12:50 pmSEA  Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado
14h 15m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:00 pm - 5:00 pmLIS  Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl
35h 00m1 stop Reykjavik Keflavik Intl
$667Icelandair
Wed, Dec 2 - Tue, Dec 8
Icelandair Logo
2:35 pm - 12:50 pmSEA  Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado
14h 15m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:00 pm - 5:00 pmLIS  Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl
35h 00m1 stop Reykjavik Keflavik Intl
$669Icelandair
Wed, Dec 2 - Tue, Dec 8
Multiple Airlines Logo
2:35 pm - 8:30 amSEA  Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado
33h 55m3 stops Reykjavik Keflavik Intl Stockholm Arlanda Barcelona-El Prat
Multiple Airlines Logo
6:25 pm - 5:00 pmLIS  Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl
30h 35m3 stops Kastrup Copenhagen Stockholm Arlanda Reykjavik Keflavik Intl
$693Multiple Airlines
Wed, Dec 2 - Tue, Dec 8
Multiple Airlines Logo
2:35 pm - 10:30 amSEA  Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado
35h 55m3 stops Reykjavik Keflavik Intl Stockholm Arlanda Amsterdam Schiphol
Multiple Airlines Logo
6:25 pm - 5:00 pmLIS  Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl
30h 35m3 stops Kastrup Copenhagen Stockholm Arlanda Reykjavik Keflavik Intl
$705Multiple Airlines
Mon, Nov 23 - Tue, Dec 8
Lufthansa Logo
6:50 pm - 11:25 pmSEA  Seattle/Tacoma Intl-OPO Porto
20h 35m1 stop Munich Franz Josef Strauss
Lufthansa Logo
6:20 am - 2:38 pmOPO  Porto-SEA Seattle/Tacoma Intl
40h 18m2 stops Munich Franz Josef Strauss Vancouver Intl
$709Lufthansa
Tue, Apr 13 - Wed, Apr 21
Delta Logo
1:30 pm - 3:25 pmSEA  Seattle/Tacoma Intl-OPO Porto
17h 55m1 stop Paris Charles de Gaulle
Delta Logo
11:45 am - 4:20 pmOPO  Porto-SEA Seattle/Tacoma Intl
36h 35m1 stop Amsterdam Schiphol
$712Delta
Mon, Apr 12 - Wed, Apr 21
Delta Logo
1:30 pm - 3:25 pmSEA  Seattle/Tacoma Intl-OPO Porto
17h 55m1 stop Paris Charles de Gaulle
Delta Logo
11:45 am - 4:20 pmOPO  Porto-SEA Seattle/Tacoma Intl
36h 35m1 stop Amsterdam Schiphol
$712Delta
Mon, Apr 12 - Tue, Apr 20
KLM Logo
1:30 pm - 3:25 pmSEA  Seattle/Tacoma Intl-OPO Porto
17h 55m1 stop Paris Charles de Gaulle
KLM Logo
6:55 pm - 11:33 amOPO  Porto-SEA Seattle/Tacoma Intl
24h 38m1 stop Amsterdam Schiphol
$712KLM
Tue, Apr 13 - Thu, Apr 22
KLM Logo
1:30 pm - 3:25 pmSEA  Seattle/Tacoma Intl-OPO Porto
17h 55m1 stop Paris Charles de Gaulle
KLM Logo
5:00 am - 4:20 pmOPO  Porto-SEA Seattle/Tacoma Intl
19h 20m1 stop Amsterdam Schiphol
$712KLM
Tue, Apr 13 - Wed, Apr 21
Lufthansa Logo
7:05 pm - 11:25 pmSEA  Seattle/Tacoma Intl-OPO Porto
44h 20m2 stops Vancouver Intl Munich Franz Josef Strauss
Lufthansa Logo
11:05 am - 2:38 pmOPO  Porto-SEA Seattle/Tacoma Intl
35h 33m2 stops Munich Franz Josef Strauss Vancouver Intl
$720Lufthansa
Mon, Apr 12 - Tue, Apr 20

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

Air Canada flights from Seattle to Portugal

Our best Air Canada deals on Seattle to Portugal flight tickets
Air Canada
Nov 23
SEA10:10 amSeattle/Tacoma Intl
16h 30m
2 stops
LIS10:40 amLisbon Humberto Delgado
Dec 8
LIS5:00 amLisbon Humberto Delgado
17h 37m
2 stops
SEA2:37 pmSeattle/Tacoma Intl
$716
Air Canada
Nov 23
SEA7:45 amSeattle/Tacoma Intl
17h 35m
1 stop
LIS9:20 amLisbon Humberto Delgado
Dec 8
LIS5:00 amLisbon Humberto Delgado
17h 37m
2 stops
SEA2:37 pmSeattle/Tacoma Intl
$721
Air Canada
Apr 11
SEA3:15 pmSeattle/Tacoma Intl
40h 25m
2 stops
OPO3:40 pmPorto
Apr 23
OPO6:00 amPorto
23h 58m
2 stops
SEA9:58 pmSeattle/Tacoma Intl
$726

KLM flights from Seattle to Portugal

Our best KLM deals on Seattle to Portugal flight tickets
KLM
Nov 8
SEA7:15 amSeattle/Tacoma Intl
17h 00m
1 stop
OPO8:15 amPorto
Nov 24
OPO5:00 amPorto
19h 51m
2 stops
SEA4:51 pmSeattle/Tacoma Intl
$772
KLM
Jan 5
SEA7:15 amSeattle/Tacoma Intl
16h 45m
1 stop
LIS8:00 amLisbon Humberto Delgado
Jan 13
LIS5:00 amLisbon Humberto Delgado
14h 49m
1 stop
SEA11:49 amSeattle/Tacoma Intl
$783
KLM
Dec 1
SEA4:05 pmSeattle/Tacoma Intl
21h 55m
1 stop
OPO10:00 pmPorto
Dec 21
OPO5:00 amPorto
14h 50m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$820

momondo Fare Finder

 
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 Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 12/2

2:35 pm-12:50 pm

1 stop14h 15m

Lisbon Humberto Delgado

Tue 12/8

2:00 pm-5:00 pm

1 stop35h 00m

$667

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 12/2

2:35 pm-12:50 pm

1 stop14h 15m

Lisbon Humberto Delgado

Tue 12/8

2:00 pm-5:00 pm

1 stop35h 00m

$669

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 12/2

2:35 pm-8:30 am

3 stops33h 55m

Lisbon Humberto Delgado

Tue 12/8

6:25 pm-5:00 pm

3 stops30h 35m

$693

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Mon 11/23

2:35 pm-10:30 am

3 stops35h 55m

Lisbon Humberto Delgado

Tue 12/8

6:25 pm-5:00 pm

3 stops30h 35m

$705

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Tue 4/13

6:50 pm-11:25 pm

1 stop20h 35m

Porto

Wed 4/21

6:20 am-2:38 pm

2 stops40h 18m

$709

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 4/12

1:30 pm-3:25 pm

1 stop17h 55m

Porto

Wed 4/21

11:45 am-4:20 pm

1 stop36h 35m

$712

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 4/12

1:30 pm-3:25 pm

1 stop17h 55m

Porto

Tue 4/20

11:45 am-4:20 pm

1 stop36h 35m

$712

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Tue 4/13

1:30 pm-3:25 pm

1 stop17h 55m

Porto

Thu 4/22

6:55 pm-11:33 am

1 stop24h 38m

$712
Quickest round-trip

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Tue 4/13

1:30 pm-3:25 pm

1 stop17h 55m

Porto

Wed 4/21

5:00 am-4:20 pm

1 stop19h 20m

$712

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 4/12

7:05 pm-11:25 pm

2 stops44h 20m

Porto

Tue 4/20

11:05 am-2:38 pm

2 stops35h 33m

$720

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 $502, 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 $585.

How far in advance should I book a flight from Seattle 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 $876 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 $780 on momondo.

Can stopping save me money on Seattle to Portugal flights?

You could potentially save up to 5% 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

Best Price Found

$325

Fastest flight time

14h 00m

Direct flights

None
The best one-way flight to Portugal from Seattle in the past 72 hours is $325. The best round-trip flight deal from Seattle to Portugal found on momondo in the last 72 hours is $667.
The fastest flight from Seattle to Portugal takes 14h 00m
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 $360Free CancellationRating
6.9
758 reviews
Search Icelandair flights
LufthansaPriceFrom $462Free CancellationRating
6.8
8,277 reviews
Search Lufthansa flights
KLMPriceFrom $481Free CancellationRating
7.8
1,587 reviews
Search KLM flights
British AirwaysPriceFrom $482Free CancellationRating
6.7
8,261 reviews
Search British Airways flights
United AirlinesPriceFrom $482Free CancellationRating
7.4
10,360 reviews
Search United Airlines flights
Air FrancePriceFrom $504Free CancellationRating
7.5
1,651 reviews
Search Air France flights
DeltaPriceFrom $550Free CancellationRating
7.8
8,649 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom $567Free CancellationRating
7.4
2,018 reviews
Search Scandinavian Airlines flights
American AirlinesPriceFrom $649Free CancellationRating
7.0
12,164 reviews
Search American Airlines flights
Air CanadaPriceFrom $660Free CancellationRating
7.1
11,769 reviews
Search Air Canada 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
Fri 11/13
Fri 11/20
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

Flights to Lisbonfrom $464
Flights to Portofrom $462
Flights to Funchalfrom $551
Flights to Farofrom $622
Flights to Ponta Delgadafrom $553
Flights to Lajesfrom $553
Flights to Hortafrom $559
Flights to Pico Islandfrom $552
Flights to Porto Santofrom $858
Flights to Velasfrom $579