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Cheap flights from Seattle to Porto from $293

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
6:50 pm - 11:25 pmSEA  Seattle/Tacoma Intl-OPO Porto
20h 35m1 stop Munich Franz Josef Strauss
Lufthansa Logo
1:45 pm - 1:00 pmOPO  Porto-SEA Seattle/Tacoma Intl
31h 15m1 stop Munich Franz Josef Strauss
$715Lufthansa
Sun, Oct 18 - Tue, Nov 3
Multiple Airlines Logo
2:50 pm - 12:50 pmSEA  Seattle/Tacoma Intl-OPO Porto
14h 00m1 stop Munich Franz Josef Strauss
Multiple Airlines Logo
6:00 am - 6:20 pmOPO  Porto-SEA Seattle/Tacoma Intl
20h 20m2 stops Frankfurt am Main Vancouver Intl
$717Multiple Airlines
Wed, Jan 6 - Tue, Mar 2
Multiple Airlines Logo
10:10 am - 11:45 amSEA  Seattle/Tacoma Intl-OPO Porto
17h 35m2 stops Vancouver Intl Frankfurt am Main
Multiple Airlines Logo
6:00 am - 6:22 pmOPO  Porto-SEA Seattle/Tacoma Intl
20h 22m2 stops Frankfurt am Main Vancouver Intl
$730Multiple Airlines
Tue, Nov 10 - Tue, Nov 17
Lufthansa Logo
2:50 pm - 12:50 pmSEA  Seattle/Tacoma Intl-OPO Porto
14h 00m1 stop Munich Franz Josef Strauss
Lufthansa Logo
1:45 pm - 1:00 pmOPO  Porto-SEA Seattle/Tacoma Intl
31h 15m1 stop Munich Franz Josef Strauss
$734Lufthansa
Wed, Jan 6 - Tue, Mar 2
Delta Logo
7:15 am - 10:25 amSEA  Seattle/Tacoma Intl-OPO Porto
19h 10m1 stop New York John F Kennedy Intl
Delta Logo
11:15 am - 11:47 amOPO  Porto-SEA Seattle/Tacoma Intl
32h 32m1 stop Amsterdam Schiphol
$735Delta
Sun, Oct 18 - Tue, Nov 3
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 - 11:50 amOPO  Porto-SEA Seattle/Tacoma Intl
32h 35m1 stop Amsterdam Schiphol
$743Delta
Tue, Dec 1 - Mon, Dec 7
Air Canada Logo
7:45 am - 12:50 pmSEA  Seattle/Tacoma Intl-OPO Porto
21h 05m2 stops Toronto Pearson Intl Munich Franz Josef Strauss
Air Canada Logo
6:00 am - 9:27 amOPO  Porto-SEA Seattle/Tacoma Intl
35h 27m2 stops Frankfurt am Main Vancouver Intl
$748Air Canada
Wed, Dec 2 - Wed, Dec 9
Air Canada Logo
7:45 am - 12:50 pmSEA  Seattle/Tacoma Intl-OPO Porto
21h 05m2 stops Toronto Pearson Intl Munich Franz Josef Strauss
Air Canada Logo
6:00 am - 9:27 amOPO  Porto-SEA Seattle/Tacoma Intl
35h 27m2 stops Frankfurt am Main Vancouver Intl
$748Air Canada
Sun, Nov 29 - Wed, Dec 9
United Airlines Logo
6:50 am - 9:30 amSEA  Seattle/Tacoma Intl-OPO Porto
18h 40m1 stop Newark
United Airlines Logo
6:00 am - 9:21 pmOPO  Porto-SEA Seattle/Tacoma Intl
23h 21m2 stops Frankfurt am Main Denver Intl
$752United Airlines
Sun, Dec 6 - Thu, Dec 10
United Airlines Logo
5:05 am - 9:30 amSEA  Seattle/Tacoma Intl-OPO Porto
20h 25m2 stops Denver Intl Newark
United Airlines Logo
6:00 am - 6:09 pmOPO  Porto-SEA Seattle/Tacoma Intl
20h 09m2 stops Frankfurt am Main Denver Intl
$756United Airlines
Sun, Dec 6 - Thu, Dec 10

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Delta flights from Seattle to Porto

Our best Delta deals on Seattle to Porto flight tickets
Delta
Dec 2
SEA7:15 amSeattle/Tacoma Intl
17h 00m
1 stop
OPO8:15 amPorto
Dec 8
OPO5:00 amPorto
14h 50m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$743
Delta
Dec 1
SEA11:15 pmSeattle/Tacoma Intl
25h 00m
2 stops
OPO8:15 amPorto
Dec 9
OPO11:15 amPorto
32h 35m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$748
Delta
Nov 29
SEA7:15 amSeattle/Tacoma Intl
31h 15m
2 stops
OPO10:30 pmPorto
Dec 8
OPO5:00 amPorto
14h 50m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$752

Air Canada flights from Seattle to Porto

Our best Air Canada deals on Seattle to Porto flight tickets
Air Canada
Nov 30
SEA7:45 amSeattle/Tacoma Intl
43h 30m
2 stops
OPO11:15 amPorto
Dec 9
OPO6:00 amPorto
35h 27m
2 stops
SEA9:27 amSeattle/Tacoma Intl
$749
Air Canada
Dec 2
SEA7:45 amSeattle/Tacoma Intl
21h 05m
2 stops
OPO12:50 pmPorto
Dec 8
OPO6:00 amPorto
23h 57m
2 stops
SEA9:57 pmSeattle/Tacoma Intl
$753
Air Canada
Nov 30
SEA7:45 amSeattle/Tacoma Intl
43h 30m
2 stops
OPO11:15 amPorto
Dec 7
OPO6:00 amPorto
35h 27m
2 stops
SEA9:27 amSeattle/Tacoma Intl
$799

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

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 10/18

6:50 pm-11:25 pm

1 stop20h 35m

Porto

Tue 11/3

1:45 pm-1:00 pm

1 stop31h 15m

$715
Quickest round-trip

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 1/6

2:50 pm-12:50 pm

1 stop14h 00m

Porto

Tue 3/2

6:00 am-6:20 pm

2 stops20h 20m

$717

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Tue 11/10

10:10 am-11:45 am

2 stops17h 35m

Porto

Tue 11/17

6:00 am-6:22 pm

2 stops20h 22m

$730

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 1/6

2:50 pm-12:50 pm

1 stop14h 00m

Porto

Tue 3/2

1:45 pm-1:00 pm

1 stop31h 15m

$734

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 10/18

7:15 am-10:25 am

1 stop19h 10m

Porto

Tue 11/3

11:15 am-11:47 am

1 stop32h 32m

$735

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Tue 12/1

4:05 pm-10:00 pm

1 stop21h 55m

Porto

Mon 12/7

11:15 am-11:50 am

1 stop32h 35m

$743

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 12/2

7:45 am-12:50 pm

2 stops21h 05m

Porto

Wed 12/9

6:00 am-9:27 am

2 stops35h 27m

$748

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 11/29

7:45 am-12:50 pm

2 stops21h 05m

Porto

Wed 12/9

6:00 am-9:27 am

2 stops35h 27m

$748

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 12/6

6:50 am-9:30 am

1 stop18h 40m

Porto

Thu 12/10

6:00 am-9:21 pm

2 stops23h 21m

$752

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 12/6

5:05 am-9:30 am

2 stops20h 25m

Porto

Thu 12/10

6:00 am-6:09 pm

2 stops20h 09m

$756

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 $905 to $1,135.
The lowest price recently found on this route was $715.

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 $680.

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 $908 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 $719 on momondo.

Can stopping save me money on Seattle to Porto flights?

You could potentially save up to 23% 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

$293

Fastest flight time

17h 30m

Direct flights

None
The best one-way flight to Porto from Seattle in the past 72 hours is $293. The best round-trip flight deal from Seattle to Porto found on momondo in the last 72 hours is $715.
The fastest flight from Seattle to Porto takes 17h 30m
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 17h 30m 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
1,569 reviews
Search KLM flights
LufthansaPriceFrom $503Free CancellationRating
6.8
8,232 reviews
Search Lufthansa flights
DeltaPriceFrom $630Free CancellationRating
7.8
8,540 reviews
Search Delta flights
Air CanadaPriceFrom $660Free CancellationRating
7.1
11,570 reviews
Search Air Canada flights
United AirlinesPriceFrom $691Free CancellationRating
7.4
10,157 reviews
Search United Airlines flights
Air FrancePriceFrom $905Free CancellationRating
7.5
1,645 reviews
Search Air France flights

Traveling to a place near Porto?

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

An easier way to manage your Porto trip

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