Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Portugal from $268

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.
Multiple Airlines Logo
6:45 pm - 8:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
17h 15m2 stops London Heathrow Madrid Barajas
Multiple Airlines Logo
12:25 pm - 4:57 pmOPO  Porto-SEA Seattle/Tacoma Intl
36h 32m2 stops Madrid Barajas Dallas/Fort Worth
$608Multiple Airlines
Mon, Jan 25 - Wed, Feb 10
Multiple Airlines Logo
6:45 pm - 8:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
17h 15m2 stops London Heathrow Madrid Barajas
Multiple Airlines Logo
12:25 pm - 4:54 pmOPO  Porto-SEA Seattle/Tacoma Intl
36h 29m2 stops Madrid Barajas Dallas/Fort Worth
$608Multiple Airlines
Mon, Jan 11 - Mon, Jan 25
Lufthansa Logo
2:50 pm - 12:50 pmSEA  Seattle/Tacoma Intl-OPO Porto
14h 00m1 stop Munich Franz Josef Strauss
Lufthansa Logo
12:35 pm - 12:00 pmOPO  Porto-SEA Seattle/Tacoma Intl
31h 25m1 stop Frankfurt am Main
$654Lufthansa
Wed, Jan 6 - Wed, Jan 20
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 - 4:59 pmOPO  Porto-SEA Seattle/Tacoma Intl
18h 39m1 stop Munich Franz Josef Strauss
$657Lufthansa
Tue, Oct 6 - Wed, Oct 14
Air Canada Logo
10:50 am - 11:05 amSEA  Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado
16h 15m2 stops Vancouver Intl Toronto Pearson Intl
Air Canada Logo
6:05 am - 6:22 pmLIS  Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl
20h 17m2 stops Munich Franz Josef Strauss Vancouver Intl
$726Air Canada
Sun, Oct 18 - Tue, Nov 3
Air Canada Logo
10:10 am - 10:40 amSEA  Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado
16h 30m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
11:20 am - 9:57 pmLIS  Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl
18h 37m2 stops Toronto Pearson Intl Vancouver Intl
$728Air Canada
Mon, Nov 2 - Tue, Nov 17
Delta Logo
9:40 am - 2:55 pmSEA  Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado
21h 15m2 stops Salt Lake City Paris Charles de Gaulle
Delta Logo
5:35 am - 11:15 amLIS  Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl
13h 40m1 stop Paris Charles de Gaulle
$730Delta
Tue, Sep 22 - Fri, Oct 2
United Airlines Logo
11:14 pm - 3:20 pmSEA  Seattle/Tacoma Intl-OPO Porto
33h 06m2 stops Washington, D.C. Dulles Intl Frankfurt am Main
United Airlines Logo
6:00 am - 2:00 pmOPO  Porto-SEA Seattle/Tacoma Intl
39h 00m2 stops Frankfurt am Main Munich Franz Josef Strauss
$732United Airlines
Sat, Oct 24 - Sat, Oct 31
United Airlines Logo
7:45 am - 8:55 amSEA  Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado
17h 10m1 stop Toronto Pearson Intl
United Airlines Logo
6:00 am - 1:00 pmLIS  Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl
15h 00m1 stop Munich Franz Josef Strauss
$732United Airlines
Wed, Dec 16 - Fri, Jan 8
Delta Logo
4:05 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
21h 55m1 stop Paris Charles de Gaulle
Delta Logo
11:15 am - 11:47 amOPO  Porto-SEA Seattle/Tacoma Intl
32h 32m1 stop Amsterdam Schiphol
$738Delta
Tue, Nov 17 - Mon, Nov 23

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
Oct 18
SEA10:50 amSeattle/Tacoma Intl
16h 15m
2 stops
LIS11:05 amLisbon Humberto Delgado
Nov 3
LIS6:05 amLisbon Humberto Delgado
20h 17m
2 stops
SEA6:22 pmSeattle/Tacoma Intl
$726
Air Canada
Oct 18
SEA10:50 amSeattle/Tacoma Intl
16h 15m
2 stops
LIS11:05 amLisbon Humberto Delgado
Nov 3
LIS6:05 amLisbon Humberto Delgado
23h 52m
2 stops
SEA9:57 pmSeattle/Tacoma Intl
$729
Air Canada
Oct 18
SEA7:55 amSeattle/Tacoma Intl
19h 10m
1 stop
LIS11:05 amLisbon Humberto Delgado
Nov 3
LIS6:05 amLisbon Humberto Delgado
20h 17m
2 stops
SEA6:22 pmSeattle/Tacoma Intl
$731

American Airlines flights from Seattle to Portugal

Our best American Airlines deals on Seattle to Portugal flight tickets
American Airlines
Jan 6
SEA1:13 pmSeattle/Tacoma Intl
18h 47m
2 stops
OPO4:00 pmPorto
Jan 20
OPO8:40 pmPorto
22h 50m
2 stops
SEA11:30 amSeattle/Tacoma Intl
$616
American Airlines
Nov 2
SEA12:34 pmSeattle/Tacoma Intl
12h 31m
1 stop
LIS9:05 amLisbon Humberto Delgado
Nov 17
LIS8:20 amLisbon Humberto Delgado
20h 00m
2 stops
SEA8:20 pmSeattle/Tacoma Intl
$753
American Airlines
Sep 18
SEA7:10 pmSeattle/Tacoma Intl
18h 25m
1 stop
LIS9:35 pmLisbon Humberto Delgado
Sep 22
LIS7:10 amLisbon Humberto Delgado
18h 00m
2 stops
SEA5:10 pmSeattle/Tacoma Intl
$1,000

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

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 1/25

6:45 pm-8:00 pm

2 stops17h 15m

Porto

Wed 2/10

12:25 pm-4:57 pm

2 stops36h 32m

$608

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 1/11

6:45 pm-8:00 pm

2 stops17h 15m

Porto

Mon 1/25

12:25 pm-4:54 pm

2 stops36h 29m

$608

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 1/6

2:50 pm-12:50 pm

1 stop14h 00m

Porto

Wed 1/20

12:35 pm-12:00 pm

1 stop31h 25m

$654

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Tue 10/6

6:50 pm-11:25 pm

1 stop20h 35m

Porto

Wed 10/14

6:20 am-4:59 pm

1 stop18h 39m

$657

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sun 10/18

10:50 am-11:05 am

2 stops16h 15m

Lisbon Humberto Delgado

Tue 11/3

6:05 am-6:22 pm

2 stops20h 17m

$726

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Mon 11/2

10:10 am-10:40 am

2 stops16h 30m

Lisbon Humberto Delgado

Tue 11/17

11:20 am-9:57 pm

2 stops18h 37m

$728

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 9/22

9:40 am-2:55 pm

2 stops21h 15m

Lisbon Humberto Delgado

Fri 10/2

5:35 am-11:15 am

1 stop13h 40m

$730

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sat 10/24

11:14 pm-3:20 pm

2 stops33h 06m

Porto

Sat 10/31

6:00 am-2:00 pm

2 stops39h 00m

$732
Quickest round-trip

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 12/16

7:45 am-8:55 am

1 stop17h 10m

Lisbon Humberto Delgado

Fri 1/8

6:00 am-1:00 pm

1 stop15h 00m

$732

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Tue 11/17

4:05 pm-10:00 pm

1 stop21h 55m

Porto

Mon 11/23

11:15 am-11:47 am

1 stop32h 32m

$738

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 $470, 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 $580.

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 $852 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 $755 on momondo.

Can stopping save me money on Seattle to Portugal flights?

You could potentially save up to 7% 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

$268

Fastest flight time

13h 35m

Direct flights

None
The best one-way flight to Portugal from Seattle in the past 72 hours is $268. The best round-trip flight deal from Seattle to Portugal found on momondo in the last 72 hours is $608.
The fastest flight from Seattle to Portugal takes 13h 35m
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
6.9
741 reviews
Search Icelandair flights
LufthansaPriceFrom $471Free CancellationRating
6.8
8,213 reviews
Search Lufthansa flights
KLMPriceFrom $481Free CancellationRating
7.8
1,576 reviews
Search KLM flights
British AirwaysPriceFrom $482Free CancellationRating
6.7
8,210 reviews
Search British Airways flights
United AirlinesPriceFrom $482Free CancellationRating
7.4
10,194 reviews
Search United Airlines flights
American AirlinesPriceFrom $497Free CancellationRating
7.1
12,046 reviews
Search American Airlines flights
Air FrancePriceFrom $504Free CancellationRating
7.5
1,651 reviews
Search Air France flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
11,609 reviews
Search Air Canada flights
DeltaPriceFrom $554Free CancellationRating
7.8
8,554 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom $567Free CancellationRating
7.4
1,984 reviews
Search Scandinavian 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 10/10
Sat 10/17
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 $394
Flights to Portofrom $528
Flights to Funchalfrom $582
Flights to Farofrom $576
Flights to Ponta Delgadafrom $565
Flights to Lajesfrom $567
Flights to Hortafrom $586
Flights to Pico Islandfrom $693
Flights to Porto Santofrom $804
Flights to Velasfrom $700