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Cheap flights from Seattle to Porto from $277

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.
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 - 6:22 pmOPO  Porto-SEA Seattle/Tacoma Intl
20h 22m2 stops Frankfurt am Main Vancouver Intl
$717Multiple Airlines
Wed, Nov 11 - Thu, Dec 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 - 2:37 pmOPO  Porto-SEA Seattle/Tacoma Intl
16h 37m2 stops Frankfurt am Main Vancouver Intl
$723Multiple Airlines
Sun, Jan 10 - Thu, Feb 4
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
$729Lufthansa
Wed, Nov 11 - Thu, Dec 3
Delta Logo
4:20 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
22h 40m1 stop Paris Charles de Gaulle
Delta Logo
5:00 am - 11:47 amOPO  Porto-SEA Seattle/Tacoma Intl
14h 47m1 stop Amsterdam Schiphol
$737Delta
Wed, Oct 28 - Wed, Nov 11
Delta Logo
3:25 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
22h 35m1 stop Paris Charles de Gaulle
Delta Logo
5:00 am - 11:47 amOPO  Porto-SEA Seattle/Tacoma Intl
14h 47m1 stop Amsterdam Schiphol
$738Delta
Mon, Nov 16 - Tue, Nov 24
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 - 11:47 amOPO  Porto-SEA Seattle/Tacoma Intl
14h 47m1 stop Amsterdam Schiphol
$738KLM
Wed, Nov 18 - Fri, Nov 27
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
$738KLM
Tue, Nov 17 - Thu, Nov 26
Lufthansa Logo
10:50 am - 7:00 amSEA  Seattle/Tacoma Intl-OPO Porto
36h 10m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl
Lufthansa Logo
1:45 pm - 1:00 pmOPO  Porto-SEA Seattle/Tacoma Intl
31h 15m1 stop Munich Franz Josef Strauss
$740Lufthansa
Tue, Oct 20 - Tue, Nov 3
United Airlines Logo
8:30 am - 9:30 amSEA  Seattle/Tacoma Intl-OPO Porto
17h 00m2 stops Denver Intl Newark
United Airlines Logo
12:35 pm - 12:59 amOPO  Porto-SEA Seattle/Tacoma Intl
20h 24m2 stops Frankfurt am Main San Francisco
$746United Airlines
Sun, Nov 15 - Tue, Nov 24
United Airlines Logo
8:30 am - 9:30 amSEA  Seattle/Tacoma Intl-OPO Porto
17h 00m2 stops Denver Intl Newark
United Airlines Logo
12:35 pm - 9:40 amOPO  Porto-SEA Seattle/Tacoma Intl
29h 05m2 stops Frankfurt am Main San Francisco
$746United Airlines
Mon, Nov 16 - Thu, Nov 26

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United Airlines flights from Seattle to Porto

Our best United Airlines deals on Seattle to Porto flight tickets
United Airlines
Nov 15
SEA8:30 amSeattle/Tacoma Intl
17h 00m
2 stops
OPO9:30 amPorto
Nov 26
OPO12:35 pmPorto
29h 05m
2 stops
SEA9:40 amSeattle/Tacoma Intl
$746
United Airlines
Dec 6
SEA6:50 amSeattle/Tacoma Intl
18h 40m
1 stop
OPO9:30 amPorto
Dec 10
OPO6:00 amPorto
23h 21m
2 stops
SEA9:21 pmSeattle/Tacoma Intl
$751
United Airlines
Dec 6
SEA7:00 amSeattle/Tacoma Intl
18h 30m
2 stops
OPO9:30 amPorto
Dec 10
OPO6:00 amPorto
23h 21m
2 stops
SEA9:21 pmSeattle/Tacoma Intl
$756

Delta flights from Seattle to Porto

Our best Delta deals on Seattle to Porto flight tickets
Delta
Oct 28
SEA4:20 pmSeattle/Tacoma Intl
22h 40m
1 stop
OPO10:00 pmPorto
Nov 11
OPO5:00 amPorto
14h 47m
1 stop
SEA11:47 amSeattle/Tacoma Intl
$737
Delta
Nov 17
SEA4:05 pmSeattle/Tacoma Intl
21h 55m
1 stop
OPO10:00 pmPorto
Nov 25
OPO5:00 amPorto
14h 47m
1 stop
SEA11:47 amSeattle/Tacoma Intl
$738
Delta
Nov 16
SEA10:52 pmSeattle/Tacoma Intl
27h 43m
2 stops
OPO10:35 amPorto
Nov 24
OPO11:15 amPorto
32h 32m
1 stop
SEA11:47 amSeattle/Tacoma Intl
$742

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

2:50 pm-12:50 pm

1 stop14h 00m

Porto

Thu 12/3

6:00 am-6:22 pm

2 stops20h 22m

$717
Quickest round-trip

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 1/10

2:50 pm-12:50 pm

1 stop14h 00m

Porto

Thu 2/4

6:00 am-2:37 pm

2 stops16h 37m

$723

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 11/11

2:50 pm-12:50 pm

1 stop14h 00m

Porto

Thu 12/3

1:45 pm-1:00 pm

1 stop31h 15m

$729

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 10/28

4:20 pm-10:00 pm

1 stop22h 40m

Porto

Wed 11/11

5:00 am-11:47 am

1 stop14h 47m

$737

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 11/16

3:25 pm-10:00 pm

1 stop22h 35m

Porto

Tue 11/24

5:00 am-11:47 am

1 stop14h 47m

$738

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 11/18

7:15 am-8:15 am

1 stop17h 00m

Porto

Fri 11/27

5:00 am-11:47 am

1 stop14h 47m

$738

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Tue 11/17

4:05 pm-10:00 pm

1 stop21h 55m

Porto

Thu 11/26

5:00 am-11:47 am

1 stop14h 47m

$738

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Tue 10/20

10:50 am-7:00 am

2 stops36h 10m

Porto

Tue 11/3

1:45 pm-1:00 pm

1 stop31h 15m

$740

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Sun 11/15

8:30 am-9:30 am

2 stops17h 00m

Porto

Tue 11/24

12:35 pm-12:59 am

2 stops20h 24m

$746

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 11/16

8:30 am-9:30 am

2 stops17h 00m

Porto

Thu 11/26

12:35 pm-9:40 am

2 stops29h 05m

$746

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 $906 to $1,127.
The lowest price recently found on this route was $717.

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 $905 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

$277

Fastest flight time

14h 00m

Direct flights

None
The best one-way flight to Porto from Seattle in the past 72 hours is $277. The best round-trip flight deal from Seattle to Porto found on momondo in the last 72 hours is $717.
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
1,570 reviews
Search KLM flights
LufthansaPriceFrom $503Free CancellationRating
6.8
8,222 reviews
Search Lufthansa flights
DeltaPriceFrom $630Free CancellationRating
7.8
8,552 reviews
Search Delta flights
Air CanadaPriceFrom $660Free CancellationRating
7.1
11,593 reviews
Search Air Canada flights
United AirlinesPriceFrom $691Free CancellationRating
7.4
10,173 reviews
Search United Airlines flights
Air FrancePriceFrom $905Free CancellationRating
7.5
1,647 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
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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