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Cheap flights from Seattle to Porto from $328

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.
British Airways Logo
10:43 am - 4:50 pmSEA  Seattle/Tacoma Intl-OPO Porto
22h 07m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
8:20 am - 12:32 amOPO  Porto-SEA Seattle/Tacoma Intl
24h 12m2 stops Madrid Barajas Chicago O'Hare Intl
$603British Airways
Wed, Nov 11 - Thu, Dec 3
Delta Logo
7:15 am - 8:15 amSEA  Seattle/Tacoma Intl-OPO Porto
17h 00m1 stop New York John F Kennedy Intl
Delta Logo
5:00 am - 11:50 amOPO  Porto-SEA Seattle/Tacoma Intl
14h 50m1 stop Amsterdam Schiphol
$608Delta
Wed, Nov 18 - Wed, Jan 13
United Airlines Logo
6:00 am - 9:30 amSEA  Seattle/Tacoma Intl-OPO Porto
19h 30m2 stops Los Angeles Newark
United Airlines Logo
12:35 pm - 10:27 pmOPO  Porto-SEA Seattle/Tacoma Intl
17h 52m1 stop Newark
$609United Airlines
Wed, Nov 11 - Thu, Dec 3
United Airlines Logo
6:30 am - 9:30 amSEA  Seattle/Tacoma Intl-OPO Porto
19h 00m1 stop Newark
United Airlines Logo
12:35 pm - 1:01 pmOPO  Porto-SEA Seattle/Tacoma Intl
32h 26m1 stop Newark
$612United Airlines
Wed, Nov 11 - Thu, Dec 3
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 - 8:02 pmOPO  Porto-SEA Seattle/Tacoma Intl
39h 37m2 stops Madrid Barajas Dallas/Fort Worth
$614Multiple Airlines
Mon, Jan 11 - Mon, Jan 25
Delta Logo
3:25 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
22h 35m1 stop Paris Charles de Gaulle
Delta Logo
10:15 am - 11:09 pmOPO  Porto-SEA Seattle/Tacoma Intl
20h 54m1 stop New York John F Kennedy Intl
$618Delta
Wed, Nov 11 - Thu, Dec 3
KLM Logo
7:15 am - 8:15 amSEA  Seattle/Tacoma Intl-OPO Porto
17h 00m1 stop New York John F Kennedy Intl
KLM Logo
5:00 am - 4:53 pmOPO  Porto-SEA Seattle/Tacoma Intl
19h 53m2 stops Amsterdam Schiphol Salt Lake City
$619KLM
Wed, Nov 18 - Wed, Jan 13
KLM Logo
7:15 am - 8:15 amSEA  Seattle/Tacoma Intl-OPO Porto
17h 00m1 stop New York John F Kennedy Intl
KLM Logo
5:55 am - 1:50 pmOPO  Porto-SEA Seattle/Tacoma Intl
15h 55m1 stop Paris Charles de Gaulle
$629KLM
Wed, Nov 18 - Tue, Jan 12
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 - 8:59 pmOPO  Porto-SEA Seattle/Tacoma Intl
46h 59m2 stops Frankfurt am Main Toronto Pearson Intl
$640Air Canada
Mon, Nov 16 - Fri, Jan 15
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 - 8:59 pmOPO  Porto-SEA Seattle/Tacoma Intl
46h 59m2 stops Frankfurt am Main Toronto Pearson Intl
$640Air Canada
Wed, Nov 18 - Fri, Jan 15

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Lufthansa flights from Seattle to Porto

Our best Lufthansa deals on Seattle to Porto flight tickets
Lufthansa
Nov 7
SEA1:50 pmSeattle/Tacoma Intl
17h 20m
1 stop
OPO3:10 pmPorto
Nov 14
OPO1:45 pmPorto
31h 15m
1 stop
SEA1:00 pmSeattle/Tacoma Intl
$712
Lufthansa
Oct 6
SEA6:50 pmSeattle/Tacoma Intl
20h 35m
1 stop
OPO11:25 pmPorto
Oct 14
OPO6:20 amPorto
18h 39m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$886
Lufthansa
Oct 6
SEA6:50 pmSeattle/Tacoma Intl
20h 35m
1 stop
OPO11:25 pmPorto
Oct 14
OPO12:00 pmPorto
32h 20m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$926

SWISS flights from Seattle to Porto

Our best SWISS deals on Seattle to Porto flight tickets
SWISS
Nov 16
SEA3:35 pmSeattle/Tacoma Intl
35h 40m
2 stops
OPO11:15 amPorto
Jan 11
OPO7:20 pmPorto
33h 28m
2 stops
SEA8:48 pmSeattle/Tacoma Intl
$665
SWISS
Oct 6
SEA7:00 amSeattle/Tacoma Intl
20h 25m
2 stops
OPO11:25 amPorto
Oct 14
OPO6:45 pmPorto
31h 47m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$896
SWISS
Oct 6
SEA7:00 amSeattle/Tacoma Intl
26h 35m
2 stops
OPO5:35 pmPorto
Oct 14
OPO6:45 pmPorto
31h 47m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$913

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

Wed 11/11

10:43 am-4:50 pm

2 stops22h 07m

Porto

Thu 12/3

8:20 am-12:32 am

2 stops24h 12m

$603
Quickest round-trip

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 11/18

7:15 am-8:15 am

1 stop17h 00m

Porto

Wed 1/13

5:00 am-11:50 am

1 stop14h 50m

$608

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 11/11

6:00 am-9:30 am

2 stops19h 30m

Porto

Thu 12/3

12:35 pm-10:27 pm

1 stop17h 52m

$609

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 11/11

6:30 am-9:30 am

1 stop19h 00m

Porto

Thu 12/3

12:35 pm-1:01 pm

1 stop32h 26m

$612

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-8:02 pm

2 stops39h 37m

$614

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 11/11

3:25 pm-10:00 pm

1 stop22h 35m

Porto

Thu 12/3

10:15 am-11:09 pm

1 stop20h 54m

$618

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 11/18

7:15 am-8:15 am

1 stop17h 00m

Porto

Wed 1/13

5:00 am-4:53 pm

2 stops19h 53m

$619

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 11/18

7:15 am-8:15 am

1 stop17h 00m

Porto

Tue 1/12

5:55 am-1:50 pm

1 stop15h 55m

$629

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 11/16

7:45 am-11:15 am

2 stops43h 30m

Porto

Fri 1/15

6:00 am-8:59 pm

2 stops46h 59m

$640

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 11/18

7:45 am-11:15 am

2 stops43h 30m

Porto

Fri 1/15

6:00 am-8:59 pm

2 stops46h 59m

$640

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 $839 to $1,013.
The lowest price recently found on this route was $603.

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 $896 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 $744 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

$328

Fastest flight time

17h 15m

Direct flights

None
The best one-way flight to Porto from Seattle in the past 72 hours is $328. The best round-trip flight deal from Seattle to Porto found on momondo in the last 72 hours is $603.
The fastest flight from Seattle to Porto takes 17h 15m
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 15m 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
1,576 reviews
Search KLM flights
LufthansaPriceFrom $503Free CancellationRating
6.8
8,235 reviews
Search Lufthansa flights
DeltaPriceFrom $630Free CancellationRating
7.8
8,596 reviews
Search Delta flights
Air CanadaPriceFrom $660Free CancellationRating
7.1
11,677 reviews
Search Air Canada flights
United AirlinesPriceFrom $691Free CancellationRating
7.4
10,233 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
Vila Nova de Gaia
Braga
Aveiro
Pinhao
Matosinhos
Esposende
Chaves
Viseu
Arcos de Valdevez
Espinho
Guimarães
Lamego
Ponte de Lima
Penafiel
Caminha
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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