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Cheap flights from Seattle to Porto from $331

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
2:50 pm - 12:50 pmSEA  Seattle/Tacoma Intl-OPO Porto
14h 00m1 stop Munich Franz Josef Strauss
Lufthansa Logo
6:15 am - 1:00 pmOPO  Porto-SEA Seattle/Tacoma Intl
14h 45m1 stop Munich Franz Josef Strauss
$694Lufthansa
Sun, Feb 14 - Fri, Feb 26
Multiple Airlines Logo
7:45 am - 6:30 pmSEA  Seattle/Tacoma Intl-OPO Porto
26h 45m2 stops Toronto Pearson Intl Zurich
Multiple Airlines Logo
6:15 am - 1:00 pmOPO  Porto-SEA Seattle/Tacoma Intl
14h 45m1 stop Munich Franz Josef Strauss
$701Multiple Airlines
Sun, Feb 14 - Fri, Feb 26
Lufthansa Logo
6:50 pm - 11:25 pmSEA  Seattle/Tacoma Intl-OPO Porto
20h 35m1 stop Munich Franz Josef Strauss
Lufthansa Logo
6:00 am - 12:20 pmOPO  Porto-SEA Seattle/Tacoma Intl
14h 20m1 stop Frankfurt am Main
$702Lufthansa
Sun, Apr 18 - Wed, Apr 28
Multiple Airlines Logo
10:10 am - 11:25 pmSEA  Seattle/Tacoma Intl-OPO Porto
29h 15m2 stops Vancouver Intl Munich Franz Josef Strauss
Multiple Airlines Logo
6:00 am - 6:23 pmOPO  Porto-SEA Seattle/Tacoma Intl
20h 23m2 stops Frankfurt am Main Vancouver Intl
$702Multiple Airlines
Sun, Apr 18 - Wed, Apr 28
United Airlines Logo
7:32 pm - 9:45 amSEA  Seattle/Tacoma Intl-OPO Porto
30h 13m3 stops San Francisco Houston George Bush Intcntl Newark
United Airlines Logo
6:00 am - 12:20 pmOPO  Porto-SEA Seattle/Tacoma Intl
14h 20m1 stop Frankfurt am Main
$721United Airlines
Sat, Apr 24 - Fri, Apr 30
United Airlines Logo
11:50 pm - 9:45 amSEA  Seattle/Tacoma Intl-OPO Porto
25h 55m2 stops Chicago O'Hare Intl Newark
United Airlines Logo
6:00 am - 12:20 pmOPO  Porto-SEA Seattle/Tacoma Intl
14h 20m1 stop Frankfurt am Main
$721United Airlines
Sat, Apr 24 - Fri, Apr 30
Delta Logo
6:35 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
19h 25m1 stop Paris Charles de Gaulle
Delta Logo
5:00 am - 4:20 pmOPO  Porto-SEA Seattle/Tacoma Intl
19h 20m1 stop Amsterdam Schiphol
$722Delta
Mon, Apr 19 - Wed, Apr 28
Delta Logo
6:35 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
19h 25m1 stop Paris Charles de Gaulle
Delta Logo
5:00 am - 11:33 amOPO  Porto-SEA Seattle/Tacoma Intl
14h 33m1 stop Amsterdam Schiphol
$722Delta
Wed, Apr 21 - Wed, Apr 28
Air Canada Logo
8:40 am - 3:40 pmSEA  Seattle/Tacoma Intl-OPO Porto
23h 00m2 stops Vancouver Intl Frankfurt am Main
Air Canada Logo
6:00 am - 9:18 amOPO  Porto-SEA Seattle/Tacoma Intl
35h 18m2 stops Frankfurt am Main Vancouver Intl
$736Air Canada
Mon, Apr 19 - Wed, Apr 28
Air Canada Logo
7:45 am - 6:30 pmSEA  Seattle/Tacoma Intl-OPO Porto
27h 45m2 stops Toronto Pearson Intl Zurich
Air Canada Logo
6:10 am - 8:59 pmOPO  Porto-SEA Seattle/Tacoma Intl
21h 49m2 stops Munich Franz Josef Strauss Toronto Pearson Intl
$781Air Canada
Mon, Mar 22 - Sat, Mar 27

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Lufthansa flights from Seattle to Porto

Our best Lufthansa deals on Seattle to Porto flight tickets
Lufthansa
Feb 14
SEA2:50 pmSeattle/Tacoma Intl
14h 00m
1 stop
OPO12:50 pmPorto
Feb 26
OPO6:15 amPorto
14h 45m
1 stop
SEA1:00 pmSeattle/Tacoma Intl
$694
Lufthansa
Mar 21
SEA3:50 pmSeattle/Tacoma Intl
14h 00m
1 stop
OPO12:50 pmPorto
Mar 28
OPO6:00 amPorto
14h 20m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$741
Lufthansa
Feb 12
SEA2:50 pmSeattle/Tacoma Intl
14h 00m
1 stop
OPO12:50 pmPorto
Feb 18
OPO2:05 pmPorto
30h 55m
1 stop
SEA1:00 pmSeattle/Tacoma Intl
$752

United Airlines flights from Seattle to Porto

Our best United Airlines deals on Seattle to Porto flight tickets
United Airlines
Apr 24
SEA7:32 pmSeattle/Tacoma Intl
30h 13m
3 stops
OPO9:45 amPorto
Apr 30
OPO6:00 amPorto
14h 20m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$721
United Airlines
Apr 20
SEA7:32 pmSeattle/Tacoma Intl
30h 13m
3 stops
OPO9:45 amPorto
Apr 28
OPO6:00 amPorto
14h 20m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$726
United Airlines
Apr 24
SEA10:45 pmSeattle/Tacoma Intl
27h 00m
1 stop
OPO9:45 amPorto
Apr 30
OPO6:00 amPorto
14h 20m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$728

momondo Fare Finder

 
Use the filters below to find and compare flights from Seattle to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 2/14

2:50 pm-12:50 pm

1 stop14h 00m

Porto

Fri 2/26

6:15 am-1:00 pm

1 stop14h 45m

$694

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 2/14

7:45 am-6:30 pm

2 stops26h 45m

Porto

Fri 2/26

6:15 am-1:00 pm

1 stop14h 45m

$701

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 4/18

6:50 pm-11:25 pm

1 stop20h 35m

Porto

Wed 4/28

6:00 am-12:20 pm

1 stop14h 20m

$702

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 4/18

10:10 am-11:25 pm

2 stops29h 15m

Porto

Wed 4/28

6:00 am-6:23 pm

2 stops20h 23m

$702

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sat 4/24

7:32 pm-9:45 am

3 stops30h 13m

Porto

Fri 4/30

6:00 am-12:20 pm

1 stop14h 20m

$721

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sat 4/24

11:50 pm-9:45 am

2 stops25h 55m

Porto

Fri 4/30

6:00 am-12:20 pm

1 stop14h 20m

$721

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 4/19

6:35 pm-10:00 pm

1 stop19h 25m

Porto

Wed 4/28

5:00 am-4:20 pm

1 stop19h 20m

$722

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 4/21

6:35 pm-10:00 pm

1 stop19h 25m

Porto

Wed 4/28

5:00 am-11:33 am

1 stop14h 33m

$722

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 4/19

8:40 am-3:40 pm

2 stops23h 00m

Porto

Wed 4/28

6:00 am-9:18 am

2 stops35h 18m

$736

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 3/22

7:45 am-6:30 pm

2 stops27h 45m

Porto

Sat 3/27

6:10 am-8:59 pm

2 stops21h 49m

$781

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 Porto from

How to get the cheapest flight ticket from Seattle to Porto

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 typical price of a round-trip flight between Seattle and Porto?

Prices are currently low for flights on this route.

Typical prices usually range from $763 to $1,040.
The lowest price recently found on this route was $694.

What is the cheapest month to fly to Porto?

The month of January is, on average, the cheapest month to fly to Porto from Seattle, with most prices found around $498. If you aren’t able to travel during the month of January, then book flights to Porto from Seattle during March instead. Flights to Porto in March, while not as cheap as those in January, still average around $691.

How far in advance should I book a flight from Seattle to Porto?

You are more likely to see cheaper flights to Porto from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $897 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Seattle for as low as $758 on momondo.

Can stopping save me money on Seattle to Porto flights?

You could potentially save up to 5% on your flight if you consider stops on a Seattle to Porto flight.

How have Seattle to Porto flight prices changed over time?

When to book flights from Seattle to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Porto (SEA to OPO) flight deals and tips

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

Best Price Found

$331

Fastest flight time

14h 00m

Direct flights

None
The best one-way flight to Porto from Seattle in the past 72 hours is $331. The best round-trip flight deal from Seattle to Porto found on momondo in the last 72 hours is $694.
The fastest flight from Seattle to Porto takes 14h 00m
There are no direct flights from Seattle to Porto. There are no popular flight routes from Seattle to Porto.
Search flight deals

Frequently asked questions about flying from Seattle to Porto

  • How far is Seattle/Tacoma Intl to Porto by plane?

    Seattle/Tacoma Intl and Porto are 5083.1 mi apart from one another. Typically, this will take 14h 00m by plane in normal conditions.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Porto Airport are refreshed on a daily basis.

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

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Porto 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 Seattle/Tacoma Intl Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The travel and health documents you'll need for your trip to Porto Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Porto Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Porto?

Best airlines flying from Seattle to Porto

Compare and see reviews for airlines that fly from Seattle to Porto with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $490Free CancellationRating
7.8
1,597 reviews
Search KLM flights
LufthansaPriceFrom $503Free CancellationRating
6.8
8,295 reviews
Search Lufthansa flights
DeltaPriceFrom $630Free CancellationRating
7.8
8,683 reviews
Search Delta flights
Air CanadaPriceFrom $660Free CancellationRating
7.1
11,819 reviews
Search Air Canada flights
United AirlinesPriceFrom $691Free CancellationRating
7.3
10,443 reviews
Search United Airlines flights
Air FrancePriceFrom $795Free CancellationRating
7.5
1,652 reviews
Search Air France flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Braga
Coimbra
Vila Nova de Gaia
Aveiro
Pinhao
Matosinhos
Esposende
Chaves
Viseu
Espinho
Arcos de Valdevez
Guimarães
Lamego
Caminha
Penafiel
Ponte de Lima
Mira

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Porto from Seattle.

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

Yes. All flights to Porto from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

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 Porto.

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

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

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