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Cheap flights from Seattle to Porto from $333

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.
Delta Logo
4:05 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
21h 55m1 stop Paris Charles de Gaulle
Delta Logo
5:00 am - 11:47 amOPO  Porto-SEA Seattle/Tacoma Intl
14h 47m1 stop Amsterdam Schiphol
$712Delta
Tue, Feb 2 - Fri, Feb 5
Delta Logo
3:30 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
22h 30m1 stop Paris Charles de Gaulle
Delta Logo
5:00 am - 11:47 amOPO  Porto-SEA Seattle/Tacoma Intl
14h 47m1 stop Amsterdam Schiphol
$712Delta
Mon, Feb 1 - Fri, Feb 5
Air Canada Logo
7:45 am - 11:15 amSEA  Seattle/Tacoma Intl-OPO Porto
43h 30m2 stops Toronto Pearson Intl Zurich
Air Canada Logo
6:00 am - 2:37 pmOPO  Porto-SEA Seattle/Tacoma Intl
16h 37m2 stops Frankfurt am Main Vancouver Intl
$721Air Canada
Mon, Feb 1 - Fri, Feb 5
Air Canada Logo
10:10 am - 3:25 pmSEA  Seattle/Tacoma Intl-OPO Porto
21h 15m2 stops Vancouver Intl Frankfurt am Main
Air Canada Logo
6:00 am - 9:32 amOPO  Porto-SEA Seattle/Tacoma Intl
35h 32m2 stops Frankfurt am Main Vancouver Intl
$726Air Canada
Mon, Feb 1 - Thu, Feb 4
Lufthansa Logo
8:08 am - 3:20 pmSEA  Seattle/Tacoma Intl-OPO Porto
23h 12m2 stops Washington, D.C. Dulles Intl Frankfurt am Main
Lufthansa Logo
6:15 am - 1:00 pmOPO  Porto-SEA Seattle/Tacoma Intl
14h 45m1 stop Munich Franz Josef Strauss
$732Lufthansa
Wed, Feb 3 - Fri, Feb 5
Lufthansa Logo
8:08 am - 3:20 pmSEA  Seattle/Tacoma Intl-OPO Porto
23h 12m2 stops Washington, D.C. Dulles Intl Frankfurt am Main
Lufthansa Logo
6:00 am - 7:38 pmOPO  Porto-SEA Seattle/Tacoma Intl
21h 38m2 stops Frankfurt am Main Chicago O'Hare Intl
$740Lufthansa
Wed, Feb 3 - Fri, Feb 5
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
$746KLM
Sun, Apr 4 - Mon, Apr 12
Multiple Airlines Logo
1:30 pm - 3:25 pmSEA  Seattle/Tacoma Intl-OPO Porto
17h 55m1 stop Paris Charles de Gaulle
Multiple Airlines Logo
5:00 am - 4:20 pmOPO  Porto-SEA Seattle/Tacoma Intl
19h 20m1 stop Amsterdam Schiphol
$746Multiple Airlines
Sun, Apr 4 - Tue, Apr 13
Multiple Airlines Logo
2:50 pm - 1:15 pmSEA  Seattle/Tacoma Intl-OPO Porto
14h 25m1 stop Munich Franz Josef Strauss
Multiple Airlines Logo
6:00 am - 2:37 pmOPO  Porto-SEA Seattle/Tacoma Intl
16h 37m2 stops Frankfurt am Main Vancouver Intl
$751Multiple Airlines
Wed, Dec 2 - Wed, Dec 9
KLM Logo
4:05 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
21h 55m1 stop Paris Charles de Gaulle
KLM Logo
5:00 am - 11:47 amOPO  Porto-SEA Seattle/Tacoma Intl
14h 47m1 stop Amsterdam Schiphol
$770KLM
Tue, Dec 29 - Fri, Feb 5

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Lufthansa flights from Seattle to Porto

Our best Lufthansa deals on Seattle to Porto flight tickets
Lufthansa
Feb 3
SEA8:08 amSeattle/Tacoma Intl
23h 12m
2 stops
OPO3:20 pmPorto
Feb 5
OPO6:15 amPorto
14h 45m
1 stop
SEA1:00 pmSeattle/Tacoma Intl
$732
Lufthansa
Feb 3
SEA8:08 amSeattle/Tacoma Intl
23h 12m
2 stops
OPO3:20 pmPorto
Feb 5
OPO6:00 amPorto
21h 38m
2 stops
SEA7:38 pmSeattle/Tacoma Intl
$740
Lufthansa
Feb 1
SEA1:50 pmSeattle/Tacoma Intl
17h 35m
1 stop
OPO3:25 pmPorto
Feb 3
OPO12:35 pmPorto
31h 25m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$763

United Airlines flights from Seattle to Porto

Our best United Airlines deals on Seattle to Porto flight tickets
United Airlines
Apr 5
SEA7:32 pmSeattle/Tacoma Intl
30h 13m
3 stops
OPO9:45 amPorto
Apr 13
OPO6:00 amPorto
13h 55m
1 stop
SEA11:55 amSeattle/Tacoma Intl
$756
United Airlines
Apr 3
SEA10:45 pmSeattle/Tacoma Intl
27h 00m
1 stop
OPO9:45 amPorto
Apr 14
OPO6:00 amPorto
13h 55m
1 stop
SEA11:55 amSeattle/Tacoma Intl
$757
United Airlines
Apr 3
SEA10:40 pmSeattle/Tacoma Intl
27h 05m
2 stops
OPO9:45 amPorto
Apr 14
OPO6:00 amPorto
24h 29m
2 stops
SEA10:29 pmSeattle/Tacoma Intl
$759

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

Tue 2/2

4:05 pm-10:00 pm

1 stop21h 55m

Porto

Fri 2/5

5:00 am-11:47 am

1 stop14h 47m

$712

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 2/1

3:30 pm-10:00 pm

1 stop22h 30m

Porto

Fri 2/5

5:00 am-11:47 am

1 stop14h 47m

$712

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 2/1

7:45 am-11:15 am

2 stops43h 30m

Porto

Fri 2/5

6:00 am-2:37 pm

2 stops16h 37m

$721

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 2/1

10:10 am-3:25 pm

2 stops21h 15m

Porto

Thu 2/4

6:00 am-9:32 am

2 stops35h 32m

$726

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 2/3

8:08 am-3:20 pm

2 stops23h 12m

Porto

Fri 2/5

6:15 am-1:00 pm

1 stop14h 45m

$732

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 2/3

8:08 am-3:20 pm

2 stops23h 12m

Porto

Fri 2/5

6:00 am-7:38 pm

2 stops21h 38m

$740

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 4/4

1:30 pm-3:25 pm

1 stop17h 55m

Porto

Mon 4/12

6:55 pm-11:33 am

1 stop24h 38m

$746

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 4/4

1:30 pm-3:25 pm

1 stop17h 55m

Porto

Tue 4/13

5:00 am-4:20 pm

1 stop19h 20m

$746
Quickest round-trip

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 12/2

2:50 pm-1:15 pm

1 stop14h 25m

Porto

Wed 12/9

6:00 am-2:37 pm

2 stops16h 37m

$751

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Tue 12/29

4:05 pm-10:00 pm

1 stop21h 55m

Porto

Fri 2/5

5:00 am-11:47 am

1 stop14h 47m

$770

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 typical for flights on this route.

Typical prices usually range from $749 to $914.
The lowest price recently found on this route was $751.

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 $894 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

$333

Fastest flight time

14h 25m

Direct flights

None
The best one-way flight to Porto from Seattle in the past 72 hours is $333. The best round-trip flight deal from Seattle to Porto found on momondo in the last 72 hours is $712.
The fastest flight from Seattle to Porto takes 14h 25m
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 25m 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
1,591 reviews
Search KLM flights
LufthansaPriceFrom $503Free CancellationRating
6.8
8,279 reviews
Search Lufthansa flights
DeltaPriceFrom $630Free CancellationRating
7.8
8,650 reviews
Search Delta flights
Air CanadaPriceFrom $660Free CancellationRating
7.1
11,784 reviews
Search Air Canada flights
United AirlinesPriceFrom $691Free CancellationRating
7.3
10,387 reviews
Search United Airlines flights
Air FrancePriceFrom $795Free CancellationRating
7.5
1,651 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
Braga
Vila Nova de Gaia
Aveiro
Pinhao
Matosinhos
Esposende
Chaves
Viseu
Espinho
Arcos de Valdevez
Guimarães
Lamego
Ponte de Lima
Caminha
Penafiel
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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