What airlines fly to Seattle?

British Airways, Air France and Delta 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 40% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 5 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

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 Lisbon to Seattle takes 14h 50m on average. On the other hand, flying from Porto to Seattle takes 32h 15m 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.

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 July 2025, there are 5 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.

$373 Cheap Flights from Portugal to Seattle in 2025

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Find the cheapest flights from Portugal to Seattle

Round-trip

One-way

Last minute

Recent round-trip flight deals from Portugal to Seattle

10:15 pm - 5:50 pmLIS-SEA

27h 35m1 stop

7:35 pm - 9:35 pmSEA-LIS

18h 00m1 stop

$662Aer Lingus

Find Deal

sex, set 5 - sáb, set 20

10:15 pm - 5:50 pmLIS-SEA

27h 35m1 stop

7:35 pm - 9:35 pmSEA-LIS

18h 00m1 stop

$685Aer Lingus

Find Deal

dom, set 7 - seg, set 22

10:15 pm - 5:50 pmLIS-SEA

27h 35m1 stop

7:35 pm - 9:35 pmSEA-LIS

18h 00m1 stop

$702Aer Lingus

Find Deal

sex, set 5 - sáb, set 20

5:00 am - 11:50 amLIS-SEA

14h 50m1 stop

1:30 pm - 11:15 amSEA-LIS

13h 45m1 stop

$763Delta

Find Deal

sex, out 17 - qua, out 22

5:00 am - 11:45 amLIS-SEA

14h 45m1 stop

9:40 am - 2:50 pmSEA-LIS

21h 10m2 stops

$767Delta

Find Deal

sex, set 5 - qui, set 18

6:00 am - 11:55 amOPO-SEA

13h 55m1 stop

11:10 pm - 6:55 amSEA-OPO

23h 45m1 stop

$848United Airlines

Find Deal

qui, ago 28 - sex, set 5

11:05 am - 10:04 pmLIS-SEA

18h 59m1 stop

8:20 pm - 10:05 amSEA-LIS

29h 45m1 stop

$854British Airways

Find Deal

sex, set 5 - sáb, set 20

7:20 am - 9:49 amLIS-SEA

34h 29m2 stops

8:20 pm - 10:05 amSEA-LIS

29h 45m1 stop

$855British Airways

Find Deal

sex, out 17 - qui, out 23

5:05 am - 11:55 amLIS-SEA

14h 50m1 stop

5:00 am - 8:20 amSEA-LIS

19h 20m2 stops

$856United Airlines

Find Deal

sex, out 17 - qui, out 23

5:40 am - 11:15 amLIS-SEA

13h 35m1 stop

1:30 pm - 8:50 amSEA-LIS

35h 20m1 stop

$957Air France

Find Deal

sex, set 5 - qui, set 18

Aer Lingus flights from Portugal to Seattle

Our best Aer Lingus deals on Portugal to Seattle flight tickets

Aer Lingus

Sep 5

LIS10:15 pmLisbon Humberto Delgado

27h 35m

1 stop

SEA5:50 pmSeattle/Tacoma Intl

Sep 20

SEA7:35 pmSeattle/Tacoma Intl

18h 00m

1 stop

LIS9:35 pmLisbon Humberto Delgado

$662

Find similar

Aer Lingus

Sep 7

LIS10:15 pmLisbon Humberto Delgado

27h 35m

1 stop

SEA5:50 pmSeattle/Tacoma Intl

Sep 22

SEA7:35 pmSeattle/Tacoma Intl

18h 00m

1 stop

LIS9:35 pmLisbon Humberto Delgado

$685

Find similar

Aer Lingus

Sep 5

LIS10:15 pmLisbon Humberto Delgado

27h 35m

1 stop

SEA5:50 pmSeattle/Tacoma Intl

Sep 20

SEA7:35 pmSeattle/Tacoma Intl

18h 00m

1 stop

LIS9:35 pmLisbon Humberto Delgado

$702

Find similar

Virgin Atlantic flights from Portugal to Seattle

Our best Virgin Atlantic deals on Portugal to Seattle flight tickets

Virgin Atlantic

Sep 12

LIS10:00 amLisbon Humberto Delgado

20h 25m

1 stop

SEA10:25 pmSeattle/Tacoma Intl

Sep 19

SEA7:55 pmSeattle/Tacoma Intl

28h 05m

2 stops

LIS8:00 amLisbon Humberto Delgado

$908

Find similar

Virgin Atlantic

Aug 8

LIS10:00 amLisbon Humberto Delgado

22h 01m

2 stops

SEA12:01 amSeattle/Tacoma Intl

Sep 5

SEA9:45 pmSeattle/Tacoma Intl

26h 15m

1 stop

LIS8:00 amLisbon Humberto Delgado

$1,086

Find similar

Virgin Atlantic

Aug 9

LIS12:45 pmLisbon Humberto Delgado

17h 31m

1 stop

SEA10:16 pmSeattle/Tacoma Intl

Aug 28

SEA7:18 amSeattle/Tacoma Intl

16h 42m

1 stop

LIS8:00 amLisbon Humberto Delgado

$1,108

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

sex 9/5

10:15 pm-5:50 pm

1 stop27h 35m

Seattle/Tacoma Intl

sáb 9/20

7:35 pm-9:35 pm

1 stop18h 00m

$662

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

dom 9/7

10:15 pm-5:50 pm

1 stop27h 35m

Seattle/Tacoma Intl

seg 9/22

7:35 pm-9:35 pm

1 stop18h 00m

$685

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

sex 9/5

10:15 pm-5:50 pm

1 stop27h 35m

Seattle/Tacoma Intl

sáb 9/20

7:35 pm-9:35 pm

1 stop18h 00m

$702

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

sex 10/17

5:00 am-11:50 am

1 stop14h 50m

Seattle/Tacoma Intl

qua 10/22

1:30 pm-11:15 am

1 stop13h 45m

$763

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

sex 9/5

5:00 am-11:45 am

1 stop14h 45m

Seattle/Tacoma Intl

qui 9/18

9:40 am-2:50 pm

2 stops21h 10m

$767

PortoSeattle

OPO - SEA

OPOSEA

Porto

qui 8/28

6:00 am-11:55 am

1 stop13h 55m

Seattle/Tacoma Intl

sex 9/5

11:10 pm-6:55 am

1 stop23h 45m

$848

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

sex 9/5

11:05 am-10:04 pm

1 stop18h 59m

Seattle/Tacoma Intl

sáb 9/20

8:20 pm-10:05 am

1 stop29h 45m

$854

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

sex 10/17

7:20 am-9:49 am

2 stops34h 29m

Seattle/Tacoma Intl

qui 10/23

8:20 pm-10:05 am

1 stop29h 45m

$855

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

sex 10/17

5:05 am-11:55 am

1 stop14h 50m

Seattle/Tacoma Intl

qui 10/23

5:00 am-8:20 am

2 stops19h 20m

$856

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

sex 9/5

5:40 am-11:15 am

1 stop13h 35m

Seattle/Tacoma Intl

qui 9/18

1:30 pm-8:50 am

1 stop35h 20m

$957

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

Other information

What is the cheapest month to fly to Seattle?

In general, April 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 $800. If you don’t want to visit Seattle in April, then you should wait until May to fly from Portugal, when ticket prices are also cheap, with an average price of $804.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Portugal is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $800. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday is the most expensive day to depart from Portugal because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,074.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Portugal in the evening is the least expensive time of day to depart. momondo users have found prices as low as $718 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $873. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Portugal when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $929 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Portugal for as low as $792 on momondo.

Can stopping save me money on Portugal to Seattle flights?

You could potentially save up to 17% 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

Best Price Found	$373
Fastest flight time	13h 35m
Direct flights	None
Airports in Seattle	1 airport

The best one-way flight to Seattle from Portugal in the past 72 hours is $373. The best round-trip flight deal from Portugal to Seattle found on momondo in the last 72 hours is $662.

The fastest flight from Portugal to Seattle takes 13h 35m

There are no direct flights from Portugal to Seattle. Popular non-direct routes for this connection are Lisbon Humberto Delgado Airport - Seattle/Tacoma Intl Airport and Porto Airport - Seattle/Tacoma Intl Airport.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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 July 2025, there are 5 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 6.6 7,222 reviews	Search British Airways flights
United Airlines	PriceFrom $738	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights
Air France	PriceFrom $762	Free Cancellation	Rating 7.5 1,465 reviews	Search Air France flights
Delta	PriceFrom $775	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
KLM	PriceFrom $794	Free Cancellation	Rating 7.8 1,383 reviews	Search KLM flights

Leavenworth

Tacoma

SeaTac

Ocean Shores

Olympia

Renton

Kent

Federal Way

Puyallup

Lynnwood

Marysville

Tukwila

Kirkland

Lakewood

Fife

Centralia

Cle Elum

Shoreline

Westport

Redmond

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.