What airlines fly to Seattle?

British Airways, Delta and Air France are the top three most popular airlines that fly to Seattle from Portugal according to our data. British Airways is the first choice among our users, with 29% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 4 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

How often are flights from Portugal to Seattle delayed?

Historically, on average around 50% of flights between Portugal and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 108 minutes.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

How long does it take to fly to Seattle?

Flight times vary depending on what airport in Portugal you fly out of and what airport in Seattle you fly into. For example, flying from Porto to Seattle takes 14h 40m on average. On the other hand, flying from Lisbon to Seattle takes 18h 18m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

What is the most punctual flight time for Portugal to Seattle flights?

Generally, flights departing at night tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

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

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

How many operators does momondo search for flights from Portugal to Seattle/Tacoma Intl Airport?

As of January 2026, there are 4 operators available to choose from for flights from Portugal to Seattle/Tacoma Intl Airport.

How old do you have to be to fly from Portugal to Seattle/Tacoma Intl 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 Portugal 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.

$333 Cheap Flights from Portugal to Seattle in 2026

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Round-trip

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6:10 am - 8:40 pm

LIS

SEA

22h 30m2 stops

3:40 pm - 8:00 pm

SEA

LIS

20h 20m2 stops

$711Multiple Airlines

Sat, Apr 25 - Sun, May 3

6:10 am - 8:40 pm

LIS

SEA

22h 30m2 stops

7:00 pm - 8:30 am

SEA

LIS

29h 30m3 stops

$733Multiple Airlines

Sat, Apr 25 - Sun, May 3

10:40 am - 2:19 pm

LIS

SEA

35h 39m2 stops

6:55 pm - 9:35 pm

SEA

LIS

18h 40m1 stop

$747Multiple Airlines

Sun, Apr 5 - Mon, May 4

11:05 am - 9:57 pm

LIS

SEA

18h 52m1 stop

7:15 am - 12:10 pm

SEA

LIS

20h 55m2 stops

$755British Airways

Fri, Feb 20 - Sat, Feb 28

11:05 am - 9:57 pm

LIS

SEA

18h 52m1 stop

1:37 pm - 2:50 pm

SEA

LIS

17h 13m2 stops

$756British Airways

Fri, Feb 20 - Fri, Feb 27

8:40 pm - 11:01 am

OPO

SEA

22h 21m2 stops

8:04 am - 4:00 pm

SEA

OPO

23h 56m2 stops

$769American Airlines

Wed, Jan 21 - Sun, Jan 25

12:25 pm - 11:01 am

OPO

SEA

30h 36m2 stops

10:50 am - 11:45 am

SEA

OPO

16h 55m2 stops

$770American Airlines

Wed, Jan 21 - Sun, Jan 25

5:00 am - 11:50 am

OPO

SEA

14h 50m1 stop

9:25 am - 10:30 am

SEA

OPO

17h 05m2 stops

$805Delta

Sun, Jan 18 - Tue, Jan 27

8:40 pm - 11:39 pm

OPO

SEA

34h 59m2 stops

1:35 pm - 7:40 am

SEA

OPO

34h 05m2 stops

$807Iberia

Fri, Apr 17 - Tue, Apr 21

5:00 am - 6:23 pm

OPO

SEA

21h 23m2 stops

7:10 am - 10:30 am

SEA

OPO

19h 20m2 stops

$811Delta

Sun, Jan 18 - Tue, Jan 27

Lufthansa flights from Portugal to Seattle

Our best Lufthansa deals on Portugal to Seattle flight tickets

Lufthansa

Mar 6

OPO6:00 amPorto

21h 03m

2 stops

SEA7:03 pmSeattle/Tacoma Intl

Mar 13

SEA3:00 pmSeattle/Tacoma Intl

16h 45m

1 stop

OPO2:45 pmPorto

$895

Lufthansa

Mar 6

OPO6:30 amPorto

14h 50m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

Mar 13

SEA4:10 pmSeattle/Tacoma Intl

24h 30m

1 stop

OPO11:40 pmPorto

$898

Lufthansa

Jan 9

LIS5:00 amLisbon Humberto Delgado

15h 10m

1 stop

SEA12:10 pmSeattle/Tacoma Intl

Jan 16

SEA3:10 pmSeattle/Tacoma Intl

14h 10m

1 stop

LIS1:20 pmLisbon Humberto Delgado

$2,296

United Airlines flights from Portugal to Seattle

Our best United Airlines deals on Portugal to Seattle flight tickets

United Airlines

Apr 16

OPO12:00 pmPorto

32h 20m

1 stop

SEA12:20 pmSeattle/Tacoma Intl

Apr 24

SEA11:58 amSeattle/Tacoma Intl

13h 47m

1 stop

OPO9:45 amPorto

$903

United Airlines

Apr 20

OPO12:00 pmPorto

32h 20m

1 stop

SEA12:20 pmSeattle/Tacoma Intl

Apr 26

SEA11:59 pmSeattle/Tacoma Intl

25h 46m

2 stops

OPO9:45 amPorto

$909

United Airlines

May 3

OPO12:35 pmPorto

29h 24m

2 stops

SEA9:59 amSeattle/Tacoma Intl

May 11

SEA12:01 pmSeattle/Tacoma Intl

13h 44m

1 stop

OPO9:45 amPorto

$912

Fly from

Fly to

Route

Depart

Return

Price

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 4/25

6:10 am-8:40 pm

2 stops22h 30m

Seattle/Tacoma Intl

Sun 5/3

3:40 pm-8:00 pm

2 stops20h 20m

$711

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 4/25

6:10 am-8:40 pm

2 stops22h 30m

Seattle/Tacoma Intl

Sun 5/3

7:00 pm-8:30 am

3 stops29h 30m

$733

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sun 4/5

10:40 am-2:19 pm

2 stops35h 39m

Seattle/Tacoma Intl

Mon 5/4

6:55 pm-9:35 pm

1 stop18h 40m

$747

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 2/20

11:05 am-9:57 pm

1 stop18h 52m

Seattle/Tacoma Intl

Sat 2/28

7:15 am-12:10 pm

2 stops20h 55m

$755

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 2/20

11:05 am-9:57 pm

1 stop18h 52m

Seattle/Tacoma Intl

Fri 2/27

1:37 pm-2:50 pm

2 stops17h 13m

$756

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 1/21

8:40 pm-11:01 am

2 stops22h 21m

Seattle/Tacoma Intl

Sun 1/25

8:04 am-4:00 pm

2 stops23h 56m

$769

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 1/21

12:25 pm-11:01 am

2 stops30h 36m

Seattle/Tacoma Intl

Sun 1/25

10:50 am-11:45 am

2 stops16h 55m

$770

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 1/18

5:00 am-11:50 am

1 stop14h 50m

Seattle/Tacoma Intl

Tue 1/27

9:25 am-10:30 am

2 stops17h 05m

$805

PortoSeattle

OPO - SEA

OPOSEA

Porto

Fri 4/17

8:40 pm-11:39 pm

2 stops34h 59m

Seattle/Tacoma Intl

Tue 4/21

1:35 pm-7:40 am

2 stops34h 05m

$807

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 1/18

5:00 am-6:23 pm

2 stops21h 23m

Seattle/Tacoma Intl

Tue 1/27

7:10 am-10:30 am

2 stops19h 20m

$811

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 Portugal 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

Prices

Airlines

Delays

Other information

What is the cheapest month to fly to Seattle?

In general, May is the cheapest month to fly from Portugal to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $804. If you don’t want to visit Seattle in May, then you should wait until April to fly from Portugal, when ticket prices are also cheap, with an average price of $807.

Can stopping save me money on Portugal to Seattle flights?

You could potentially save up to 24% on your flight if you consider stops on a Portugal to Seattle flight.

Cheap Portugal to Seattle flight deals and tips

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

Fastest flight time	14h 40m
Direct flights	None

The fastest flight from Portugal to Seattle takes 14h 40m

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

Search flight deals

When did momondo last update prices for flights from Portugal to Seattle/Tacoma Intl Airport?
Prices for flights from Portugal to Seattle/Tacoma Intl Airport are updated daily.
How many operators does momondo search for flights from Portugal to Seattle/Tacoma Intl Airport?
As of January 2026, there are 4 operators available to choose from for flights from Portugal to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Portugal to Seattle/Tacoma Intl 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 Portugal 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.

Best airlines flying from Portugal to Seattle

Compare and see reviews for airlines that fly from Portugal to Seattle with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $720	Free Cancellation	Rating 6.7 7,657 reviews	Search British Airways flights
United Airlines	PriceFrom $738	Free Cancellation	Rating 7.4 9,139 reviews	Search United Airlines flights
Air France	PriceFrom $762	Free Cancellation	Rating 7.4 1,519 reviews	Search Air France flights
Delta	PriceFrom $775	Free Cancellation	Rating 7.9 8,025 reviews	Search Delta flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Redmond

Tukwila

Federal Way

Cle Elum

Lakewood

Fife

Westport

Kirkland

Centralia

Shoreline

Why use momondo?

Why should I use momondo to find a flight deal from Portugal 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 Portugal to Seattle for you.

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

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

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

Once all potential Portugal to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Seattle from Portugal are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cheap flights from Portugal to Seattle from $333

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to Seattle departing on 4/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Filter for what you want

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Find the cheapest flights from Portugal to Seattle

Recent round-trip flight deals from Portugal to Seattle

Recent one-way flight deals from Portugal to Seattle

Recent last minute flight deals from Portugal to Seattle

Lufthansa flights from Portugal to Seattle

Our best Lufthansa deals on Portugal to Seattle flight tickets

United Airlines flights from Portugal to Seattle

Our best United Airlines deals on Portugal to Seattle flight tickets

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Use the filters below to find and compare flights from Portugal to Seattle that are best for you.

See travel insights to Seattle from

How to get the cheapest flight ticket from Portugal to Seattle

What is the cheapest month to fly to Seattle?

Can stopping save me money on Portugal to Seattle flights?

You could potentially save up to 24% on your flight if you consider stops on a Portugal to Seattle flight.

What airlines fly to Seattle?

How often are flights from Portugal to Seattle delayed?

Historically, on average around 50% of flights between Portugal and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 108 minutes.

What is the most punctual flight time for Portugal to Seattle flights?

Generally, flights departing at night tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

How long does it take to fly to Seattle?

Cheap Portugal to Seattle flight deals and tips

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

Fastest flight time

Direct flights

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

How many operators does momondo search for flights from Portugal to Seattle/Tacoma Intl Airport?

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

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

Best airlines flying from Portugal to Seattle

Compare and see reviews for airlines that fly from Portugal to Seattle with momondo

Traveling to a place near Seattle?

Why use momondo?

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

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

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

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

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Washington