What airlines fly to Portugal?

British Airways, United Airlines and Delta are the top three most popular airlines that fly to Portugal from State of Washington according to our data. British Airways is the first choice among our users, with 31% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 13 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

How long is the flight from State of Washington to Portugal?

Average flight duration from State of Washington to Portugal depends on which airport you fly into and out of. Flying from Seattle to Lisbon is 14h 10m on average, while flying from Spokane to Lisbon is 18h 55m on average. Lisbon is the most popular airport in Portugal.

What is the cheapest airline that flies from Washington to Portugal?

Icelandair, Lufthansa, and Air Canada are the most popular carriers operating from Washington to Portugal

When did momondo last update prices for flights from Washington to Portugal?

Prices for flights from Washington to Portugal are updated daily.

How many operators does momondo search for flights from Washington to Portugal?

As of December 2025, there are 13 operators available to choose from for flights from Washington to Portugal.

How old do you have to be to fly from Washington to Portugal?

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 Washington to Portugal.

What documentation or ID do you need to fly to Portugal?

The travel and health documents you'll need for your trip to Portugal 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 Portugal. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$257 Cheap Flights from Washington to Portugal in 2025/26

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3:10 pm - 1:15 pm

SEA

OPO

14h 05m1 stop

12:10 pm - 9:12 pm

OPO

SEA

41h 02m2 stops

$444Multiple Airlines

Wed, Jan 14 - Wed, Jan 21

2:00 pm - 2:45 pm

SEA

OPO

16h 45m1 stop

12:05 pm - 10:43 pm

OPO

SEA

42h 38m2 stops

$455Multiple Airlines

Thu, Jan 29 - Thu, Feb 5

3:10 pm - 1:15 pm

SEA

OPO

14h 05m1 stop

12:30 pm - 12:10 pm

OPO

SEA

31h 40m1 stop

$456Lufthansa

Wed, Jan 14 - Wed, Jan 21

2:00 pm - 2:45 pm

SEA

OPO

16h 45m1 stop

2:05 pm - 1:20 pm

OPO

SEA

31h 15m1 stop

$460Lufthansa

Thu, Jan 29 - Thu, Feb 5

3:15 pm - 9:20 am

PDX

LIS

34h 05m2 stops

10:50 am - 2:40 pm

LIS

PDX

35h 50m2 stops

$472Air Canada

Mon, Jan 19 - Sun, Feb 1

1:40 pm - 10:30 am

SEA

OPO

12h 50m1 stop

5:00 am - 11:40 am

OPO

SEA

14h 40m1 stop

$478KLM

Tue, Jan 13 - Mon, Feb 2

7:00 am - 9:20 am

GEG

LIS

42h 20m2 stops

11:20 am - 5:51 pm

LIS

GEG

37h 31m2 stops

$481Air Canada

Tue, Mar 3 - Tue, Mar 10

9:25 am - 7:20 pm

SEA

FAO

25h 55m2 stops

7:05 pm - 11:50 am

FAO

SEA

24h 45m1 stop

$483KLM

Thu, Jan 15 - Thu, Jan 29

9:45 pm - 8:00 am

PDX

LIS

26h 15m2 stops

5:00 am - 11:25 am

LIS

PDX

14h 25m1 stop

$483Delta

Mon, Jan 19 - Sun, Feb 1

7:00 am - 8:00 am

PDX

LIS

17h 00m1 stop

5:00 am - 11:25 am

LIS

PDX

14h 25m1 stop

$487Delta

Mon, Feb 2 - Wed, Feb 11

United Airlines flights from State of Washington to Portugal

Our best United Airlines deals on State of Washington to Portugal flight tickets

United Airlines

Jan 15

PDX11:59 pmPortland

24h 11m

2 stops

LIS8:10 amLisbon Humberto Delgado

Jan 27

LIS5:00 amLisbon Humberto Delgado

24h 49m

2 stops

PDX9:49 pmPortland

$485

Find similar

United Airlines

Jan 22

SEA8:40 amSeattle/Tacoma Intl

15h 30m

2 stops

LIS8:10 amLisbon Humberto Delgado

Jan 30

LIS6:10 amLisbon Humberto Delgado

15h 10m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

$486

Find similar

United Airlines

Feb 2

SEA12:57 pmSeattle/Tacoma Intl

36h 23m

3 stops

LIS9:20 amLisbon Humberto Delgado

Feb 16

LIS5:00 amLisbon Humberto Delgado

15h 10m

1 stop

SEA12:10 pmSeattle/Tacoma Intl

$487

Find similar

Icelandair flights from State of Washington to Portugal

Our best Icelandair deals on State of Washington to Portugal flight tickets

Icelandair

Jan 10

SEA2:35 pmSeattle/Tacoma Intl

21h 45m

1 stop

LIS8:20 pmLisbon Humberto Delgado

Jan 22

LIS9:20 pmLisbon Humberto Delgado

27h 40m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

$523

Find similar

Icelandair

Dec 31

SEA2:35 pmSeattle/Tacoma Intl

21h 45m

1 stop

LIS8:20 pmLisbon Humberto Delgado

Jan 11

LIS9:20 pmLisbon Humberto Delgado

27h 40m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

$631

Find similar

Icelandair

Dec 31

SEA2:35 pmSeattle/Tacoma Intl

21h 45m

1 stop

LIS8:20 pmLisbon Humberto Delgado

Jan 11

LIS9:20 pmLisbon Humberto Delgado

27h 40m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

$659

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Wed 1/14

3:10 pm-1:15 pm

1 stop14h 05m

Porto

Wed 1/21

12:10 pm-9:12 pm

2 stops41h 02m

$444

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Thu 1/29

2:00 pm-2:45 pm

1 stop16h 45m

Porto

Thu 2/5

12:05 pm-10:43 pm

2 stops42h 38m

$455

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Wed 1/14

3:10 pm-1:15 pm

1 stop14h 05m

Porto

Wed 1/21

12:30 pm-12:10 pm

1 stop31h 40m

$456

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Thu 1/29

2:00 pm-2:45 pm

1 stop16h 45m

Porto

Thu 2/5

2:05 pm-1:20 pm

1 stop31h 15m

$460

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Mon 1/19

3:15 pm-9:20 am

2 stops34h 05m

Lisbon Humberto Delgado

Sun 2/1

10:50 am-2:40 pm

2 stops35h 50m

$472

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Tue 1/13

1:40 pm-10:30 am

1 stop12h 50m

Porto

Mon 2/2

5:00 am-11:40 am

1 stop14h 40m

$478

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Tue 3/3

7:00 am-9:20 am

2 stops42h 20m

Lisbon Humberto Delgado

Tue 3/10

11:20 am-5:51 pm

2 stops37h 31m

$481

SeattleFaro

SEA - FAO

SEAFAO

Seattle/Tacoma Intl

Thu 1/15

9:25 am-7:20 pm

2 stops25h 55m

Faro

Thu 1/29

7:05 pm-11:50 am

1 stop24h 45m

$483

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Mon 1/19

9:45 pm-8:00 am

2 stops26h 15m

Lisbon Humberto Delgado

Sun 2/1

5:00 am-11:25 am

1 stop14h 25m

$483

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Mon 2/2

7:00 am-8:00 am

1 stop17h 00m

Lisbon Humberto Delgado

Wed 2/11

5:00 am-11:25 am

1 stop14h 25m

$487

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 State of Washington to Portugal

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

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Other information

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from State of Washington is in January. Flight prices, which tend to average around $588, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Portugal from State of Washington during November instead. Flights to Portugal in November, while not as cheap as those in January, still average around $602.

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

According to our data, Monday is the cheapest day to fly to Portugal from State of Washington. The lowest ticket price found for a Monday departure recently was $908. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Friday, with ticket prices averaging around $1,111.

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

Our most recent data shows that the best time of day to fly to Portugal is in the afternoon. Flights from State of Washington to Portugal during this time can be as low as $959. At noon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,074 per ticket.

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

You are more likely to see cheaper flights to Portugal from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $879 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from State of Washington for as low as $729 on momondo.

Can stopping save me money on State of Washington to Portugal flights?

You could potentially save up to 22% on your flight if you consider stops on a State of Washington to Portugal flight.

Cheap State of Washington to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Portugal

Fastest flight time	12h 50m
Direct flights	None

The fastest flight from State of Washington to Portugal takes 12h 50m

There are no direct flights from State of Washington to Portugal. There are no popular flight routes from State of Washington to Portugal.

Search flight deals

When did momondo last update prices for flights from Washington to Portugal?
Prices for flights from Washington to Portugal are updated daily.
How many operators does momondo search for flights from Washington to Portugal?
As of December 2025, there are 13 operators available to choose from for flights from Washington to Portugal.
How old do you have to be to fly from Washington to Portugal?
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 Washington to Portugal.
What documentation or ID do you need to fly to Portugal?
The travel and health documents you'll need for your trip to Portugal 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 Portugal. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from State of Washington to Portugal

Compare and see reviews for airlines that fly from State of Washington to Portugal with momondo

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $355	Free Cancellation	Rating 7.0 591 reviews	Search Icelandair flights
KLM	PriceFrom $481	Free Cancellation	Rating 7.7 1,428 reviews	Search KLM flights
Delta	PriceFrom $505	Free Cancellation	Rating 7.9 8,008 reviews	Search Delta flights
British Airways	PriceFrom $508	Free Cancellation	Rating 6.7 7,586 reviews	Search British Airways flights
United Airlines	PriceFrom $513	Free Cancellation	Rating 7.4 9,095 reviews	Search United Airlines flights
Lufthansa	PriceFrom $516	Free Cancellation	Rating 6.8 7,637 reviews	Search Lufthansa flights
Air Canada	PriceFrom $543	Free Cancellation	Rating 7.1 10,534 reviews	Search Air Canada flights
Air France	PriceFrom $553	Free Cancellation	Rating 7.4 1,508 reviews	Search Air France flights
American Airlines	PriceFrom $558	Free Cancellation	Rating 7.2 11,054 reviews	Search American Airlines flights
SWISS	PriceFrom $562	Free Cancellation	Rating 7.5 1,817 reviews	Search SWISS flights

Why use momondo?

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

Finding the right flight to Portugal from Washington is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Portugal quick and easy, saving you time and money.

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

All flight searches from Washington to Portugal on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Washington to Portugal flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Washington to Portugal flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Portugal 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.

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Find better results for your trip to Portugal

Popular cities in Portugal

Flights to Lisbonfrom $388

Flights to Portofrom $349

Flights to Funchalfrom $408

Flights to Farofrom $425

Flights to Ponta Delgadafrom $401

Flights to Lajesfrom $475

Flights to Hortafrom $591

Flights to Pico Islandfrom $659

Flights to Porto Santofrom $425

Flights to Velasfrom $567

Cheap flights from Washington to Portugal from $257

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Portugal departing on 1/17. 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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United Airlines flights from State of Washington to Portugal

Our best United Airlines deals on State of Washington to Portugal flight tickets

Icelandair flights from State of Washington to Portugal

Our best Icelandair deals on State of Washington to Portugal flight tickets

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How to get the cheapest flight ticket from State of Washington to Portugal

What is the cheapest month to fly to Portugal?

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

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

Our most recent data shows that the best time of day to fly to Portugal is in the afternoon. Flights from State of Washington to Portugal during this time can be as low as $959. At noon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,074 per ticket.

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

Can stopping save me money on State of Washington to Portugal flights?

You could potentially save up to 22% on your flight if you consider stops on a State of Washington to Portugal flight.

What is the cheapest airline that flies from Washington to Portugal?

Icelandair, Lufthansa, and Air Canada are the most popular carriers operating from Washington to Portugal

What airlines fly to Portugal?

How long is the flight from State of Washington to Portugal?

Average flight duration from State of Washington to Portugal depends on which airport you fly into and out of. Flying from Seattle to Lisbon is 14h 10m on average, while flying from Spokane to Lisbon is 18h 55m on average. Lisbon is the most popular airport in Portugal.

Cheap State of Washington to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Portugal

Fastest flight time

Direct flights

When did momondo last update prices for flights from Washington to Portugal?

How many operators does momondo search for flights from Washington to Portugal?

How old do you have to be to fly from Washington to Portugal?

What documentation or ID do you need to fly to Portugal?

Best airlines flying from State of Washington to Portugal

Compare and see reviews for airlines that fly from State of Washington to Portugal with momondo

Why use momondo?

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

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

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

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

An easier way to manage your Portugal 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 Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo