When did momondo last update prices for flights from Porto Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Porto Airport to Seattle/Tacoma Intl Airport are updated daily.

How old do you have to be to fly from Porto Airport to Seattle/Tacoma Intl Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Porto Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$397 Cheap Flights from Porto to Seattle in 2026

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Porto to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:45 am - 7:23 pm

OPO

SEA

17h 38m

1 stop

7:00 pm - 6:30 pm

SEA

OPO

39h 30m

2 stops

$822Multiple Airlines

Sat, May 2 - Sat, May 9

5:05 am - 5:55 pm

OPO

SEA

20h 50m

3 stops

3:40 pm - 9:10 am

SEA

OPO

33h 30m

3 stops

$858Multiple Airlines

Wed, Apr 15 - Wed, Apr 22

1:30 pm - 7:23 pm

OPO

SEA

37h 53m

1 stop

7:00 pm - 10:55 pm

SEA

OPO

43h 55m

2 stops

$891Multiple Airlines

Thu, May 7 - Wed, May 13

6:20 am - 4:59 pm

OPO

SEA

18h 39m

1 stop

6:50 pm - 11:25 pm

SEA

OPO

20h 35m

1 stop

$905Lufthansa

Wed, Apr 15 - Wed, Apr 22

6:15 am - 5:15 pm

OPO

SEA

19h 00m

1 stop

7:10 pm - 11:30 pm

SEA

OPO

20h 20m

1 stop

$918Turkish Airlines

Sat, May 2 - Sat, May 9

4:40 pm - 5:15 pm

OPO

SEA

32h 35m

1 stop

7:10 pm - 3:40 pm

SEA

OPO

36h 30m

1 stop

$920Turkish Airlines

Thu, Apr 2 - Mon, Apr 6

4:20 pm - 11:42 am

OPO

SEA

27h 22m

1 stop

1:30 pm - 3:25 pm

SEA

OPO

17h 55m

1 stop

$924KLM

Tue, May 5 - Tue, May 12

6:00 am - 6:00 pm

OPO

SEA

20h 00m

2 stops

8:51 am - 9:45 am

SEA

OPO

16h 54m

2 stops

$925United Airlines

Thu, Apr 2 - Mon, Apr 6

7:00 am - 8:40 pm

OPO

SEA

21h 40m

2 stops

7:00 pm - 11:20 pm

SEA

OPO

20h 20m

2 stops

$928Multiple Airlines

Wed, Apr 15 - Wed, Apr 22

6:00 am - 8:53 pm

OPO

SEA

22h 53m

2 stops

6:30 am - 9:45 am

SEA

OPO

19h 15m

2 stops

$930United Airlines

Thu, Apr 2 - Mon, Apr 6

Turkish Airlines flights from Porto to Seattle

Our best Turkish Airlines deals on Porto to Seattle flight tickets

Turkish Airlines

May 2

OPO6:15 amPorto

19h 00m

1 stop

SEA5:15 pmSeattle/Tacoma Intl

May 9

SEA7:10 pmSeattle/Tacoma Intl

20h 20m

1 stop

OPO11:30 pmPorto

$918

Turkish Airlines

Apr 2

OPO4:40 pmPorto

32h 35m

1 stop

SEA5:15 pmSeattle/Tacoma Intl

Apr 6

SEA7:10 pmSeattle/Tacoma Intl

36h 30m

1 stop

OPO3:40 pmPorto

$920

Turkish Airlines

Aug 10

OPO10:40 amPorto

38h 35m

1 stop

SEA5:15 pmSeattle/Tacoma Intl

Aug 16

SEA7:10 pmSeattle/Tacoma Intl

30h 30m

1 stop

OPO9:40 amPorto

$1,073

Delta flights from Porto to Seattle

Our best Delta deals on Porto to Seattle flight tickets

Delta

Apr 11

OPO5:00 amPorto

17h 50m

2 stops

SEA2:50 pmSeattle/Tacoma Intl

Apr 25

SEA12:00 pmSeattle/Tacoma Intl

19h 25m

2 stops

OPO3:25 pmPorto

$939

Delta

May 2

OPO5:00 amPorto

19h 40m

2 stops

SEA4:40 pmSeattle/Tacoma Intl

May 9

SEA9:30 amSeattle/Tacoma Intl

17h 25m

2 stops

OPO10:55 amPorto

$944

Delta

May 7

OPO5:00 amPorto

14h 42m

1 stop

SEA11:42 amSeattle/Tacoma Intl

May 13

SEA6:40 pmSeattle/Tacoma Intl

19h 20m

1 stop

OPO10:00 pmPorto

$955

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sat 5/2

9:45 am-7:23 pm

1 stop17h 38m

Seattle/Tacoma Intl

Sat 5/9

7:00 pm-6:30 pm

2 stops39h 30m

$822

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 4/15

5:05 am-5:55 pm

3 stops20h 50m

Seattle/Tacoma Intl

Wed 4/22

3:40 pm-9:10 am

3 stops33h 30m

$858

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 5/7

1:30 pm-7:23 pm

1 stop37h 53m

Seattle/Tacoma Intl

Wed 5/13

7:00 pm-10:55 pm

2 stops43h 55m

$891

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 4/15

6:20 am-4:59 pm

1 stop18h 39m

Seattle/Tacoma Intl

Wed 4/22

6:50 pm-11:25 pm

1 stop20h 35m

$905

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sat 5/2

6:15 am-5:15 pm

1 stop19h 00m

Seattle/Tacoma Intl

Sat 5/9

7:10 pm-11:30 pm

1 stop20h 20m

$918

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 4/2

4:40 pm-5:15 pm

1 stop32h 35m

Seattle/Tacoma Intl

Mon 4/6

7:10 pm-3:40 pm

1 stop36h 30m

$920

PortoSeattle

OPO - SEA

OPOSEA

Porto

Tue 5/5

4:20 pm-11:42 am

1 stop27h 22m

Seattle/Tacoma Intl

Tue 5/12

1:30 pm-3:25 pm

1 stop17h 55m

$924

Quickest round-trip

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 4/2

6:00 am-6:00 pm

2 stops20h 00m

Seattle/Tacoma Intl

Mon 4/6

8:51 am-9:45 am

2 stops16h 54m

$925

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 4/15

7:00 am-8:40 pm

2 stops21h 40m

Seattle/Tacoma Intl

Wed 4/22

7:00 pm-11:20 pm

2 stops20h 20m

$928

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 4/2

6:00 am-8:53 pm

2 stops22h 53m

Seattle/Tacoma Intl

Mon 4/6

6:30 am-9:45 am

2 stops19h 15m

$930

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Porto to Seattle

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

Can stopping save me money on Porto to Seattle flights?

You could potentially save up to 23% on your flight if you consider stops on a Porto to Seattle flight.

When to book flights from Porto to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Porto to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Porto to Seattle (OPO to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Porto to Seattle

Fastest flight time	14h 47m
Direct flights	None

The fastest flight from Porto to Seattle takes 14h 47m

There are no direct flights from Porto to Seattle. There are no popular flight routes from Porto to Seattle.

Search flight deals

How far is Porto to Seattle/Tacoma Intl by plane?
Seattle/Tacoma Intl is 5083.1 mi away from Porto. 14h 47m is a normal flight duration for this route.
When did momondo last update prices for flights from Porto Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Porto Airport to Seattle/Tacoma Intl Airport are updated daily.
How old do you have to be to fly from Porto Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Porto Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Redmond

Marysville

Puyallup

Cle Elum

Lakewood

Tukwila

Federal Way

Fife

Westport

Centralia

Kirkland

Tumwater

Why use momondo?

Why should I use momondo to find a flight deal from Porto to Seattle?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Porto to Seattle for you.

Can I find flights from Porto to Seattle with flexible booking policies on momondo?

Yes. All flights to Seattle from Porto on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Porto to Seattle?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Porto.

I’m not ready to book a flight from Porto to Seattle right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Seattle from Porto. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.