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Cheap flights from Seattle to Porto from $256

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.
SWISS Logo
3:30 pm - 11:15 amSEA  Seattle/Tacoma Intl-OPO Porto
35h 45m2 stops San Francisco Zurich
SWISS Logo
12:05 pm - 8:48 pmOPO  Porto-SEA Seattle/Tacoma Intl
40h 43m2 stops Zurich San Francisco
$744SWISS
Mon, Jan 11 - Mon, Jan 25
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
$751United Airlines
Sun, Dec 6 - Thu, Dec 10
Multiple Airlines Logo
1:50 pm - 3:20 pmSEA  Seattle/Tacoma Intl-OPO Porto
17h 30m1 stop Frankfurt am Main
Multiple Airlines Logo
1:45 pm - 6:22 pmOPO  Porto-SEA Seattle/Tacoma Intl
36h 37m2 stops Munich Franz Josef Strauss Vancouver Intl
$751Multiple Airlines
Mon, Jan 11 - Mon, Jan 25
United Airlines Logo
6:50 am - 9:30 amSEA  Seattle/Tacoma Intl-OPO Porto
18h 40m1 stop Newark
United Airlines Logo
6:00 am - 11:13 pmOPO  Porto-SEA Seattle/Tacoma Intl
25h 13m3 stops Frankfurt am Main Denver Intl San Francisco
$751United Airlines
Sun, Dec 6 - Thu, Dec 10
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
$782Lufthansa
Wed, Nov 4 - Fri, Nov 27
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 - 11:50 amOPO  Porto-SEA Seattle/Tacoma Intl
14h 50m1 stop Amsterdam Schiphol
$792Delta
Mon, Jan 11 - Mon, Jan 25
Lufthansa Logo
2:50 pm - 11:55 pmSEA  Seattle/Tacoma Intl-OPO Porto
25h 05m1 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
$792Lufthansa
Wed, Nov 4 - Tue, Nov 17
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 - 11:50 amOPO  Porto-SEA Seattle/Tacoma Intl
14h 50m1 stop Amsterdam Schiphol
$797Delta
Mon, Jan 11 - Mon, Jan 25
KLM Logo
2:25 pm - 3:25 pmSEA  Seattle/Tacoma Intl-OPO Porto
17h 00m1 stop Amsterdam Schiphol
KLM Logo
5:00 am - 11:50 amOPO  Porto-SEA Seattle/Tacoma Intl
14h 50m1 stop Amsterdam Schiphol
$797KLM
Mon, Jan 11 - Mon, Jan 25
KLM Logo
8:25 am - 10:30 amSEA  Seattle/Tacoma Intl-OPO Porto
18h 05m2 stops Minneapolis St Paul Amsterdam Schiphol
KLM Logo
5:00 am - 11:50 amOPO  Porto-SEA Seattle/Tacoma Intl
14h 50m1 stop Amsterdam Schiphol
$801KLM
Fri, Dec 11 - Fri, Dec 25

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SWISS flights from Seattle to Porto

Our best SWISS deals on Seattle to Porto flight tickets
SWISS
Jan 11
SEA3:30 pmSeattle/Tacoma Intl
35h 45m
2 stops
OPO11:15 amPorto
Jan 25
OPO12:05 pmPorto
40h 43m
2 stops
SEA8:48 pmSeattle/Tacoma Intl
$744
SWISS
Jan 11
SEA1:16 pmSeattle/Tacoma Intl
37h 59m
2 stops
OPO11:15 amPorto
Jan 25
OPO12:05 pmPorto
43h 16m
2 stops
SEA11:21 pmSeattle/Tacoma Intl
$772
SWISS
Jan 11
SEA1:16 pmSeattle/Tacoma Intl
37h 59m
2 stops
OPO11:15 amPorto
Jan 25
OPO12:05 pmPorto
43h 16m
2 stops
SEA11:21 pmSeattle/Tacoma Intl
$773

Delta flights from Seattle to Porto

Our best Delta deals on Seattle to Porto flight tickets
Delta
Jan 11
SEA3:25 pmSeattle/Tacoma Intl
22h 35m
1 stop
OPO10:00 pmPorto
Jan 25
OPO5:00 amPorto
14h 50m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$798
Delta
Dec 11
SEA8:25 amSeattle/Tacoma Intl
18h 05m
2 stops
OPO10:30 amPorto
Dec 25
OPO5:00 amPorto
14h 50m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$801
Delta
Dec 11
SEA8:25 amSeattle/Tacoma Intl
18h 05m
2 stops
OPO10:30 amPorto
Dec 25
OPO5:00 amPorto
14h 50m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$802

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

Mon 1/11

3:30 pm-11:15 am

2 stops35h 45m

Porto

Mon 1/25

12:05 pm-8:48 pm

2 stops40h 43m

$744

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

$751

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 1/11

1:50 pm-3:20 pm

1 stop17h 30m

Porto

Mon 1/25

1:45 pm-6:22 pm

2 stops36h 37m

$751

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-11:13 pm

3 stops25h 13m

$751
Quickest round-trip

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 11/4

2:50 pm-12:50 pm

1 stop14h 00m

Porto

Fri 11/27

6:15 am-1:00 pm

1 stop14h 45m

$782

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 1/11

3:25 pm-10:00 pm

1 stop22h 35m

Porto

Mon 1/25

5:00 am-11:50 am

1 stop14h 50m

$792

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Wed 11/4

2:50 pm-11:55 pm

1 stop25h 05m

Porto

Tue 11/17

1:45 pm-1:00 pm

1 stop31h 15m

$792

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 1/11

3:25 pm-10:00 pm

1 stop22h 35m

Porto

Mon 1/25

5:00 am-11:50 am

1 stop14h 50m

$797

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Mon 1/11

2:25 pm-3:25 pm

1 stop17h 00m

Porto

Mon 1/25

5:00 am-11:50 am

1 stop14h 50m

$797

SeattlePorto

SEA Seattle/Tacoma Intl - OPO Porto

SEAOPO

Seattle/Tacoma Intl

Fri 12/11

8:25 am-10:30 am

2 stops18h 05m

Porto

Fri 12/25

5:00 am-11:50 am

1 stop14h 50m

$801

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 $914 to $1,220.
The lowest price recently found on this route was $744.

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 $904 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

$256

Fastest flight time

14h 00m

Direct flights

None
The best one-way flight to Porto from Seattle in the past 72 hours is $256. The best round-trip flight deal from Seattle to Porto found on momondo in the last 72 hours is $744.
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
1,562 reviews
Search KLM flights
LufthansaPriceFrom $503Free CancellationRating
6.8
8,209 reviews
Search Lufthansa flights
DeltaPriceFrom $630Free CancellationRating
7.8
8,513 reviews
Search Delta flights
United AirlinesPriceFrom $654Free CancellationRating
7.4
10,115 reviews
Search United Airlines flights
Air CanadaPriceFrom $660Free CancellationRating
7.1
11,519 reviews
Search Air Canada flights
Turkish AirlinesPriceFrom $692Free CancellationRating
7.4
4,480 reviews
Search Turkish Airlines flights
Air FrancePriceFrom $905Free CancellationRating
7.5
1,648 reviews
Search Air France flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Braga
Aveiro
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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