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

United Airlines, Icelandair, and American Airlines are the most popular carriers operating from Washington 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 15m on average, while flying from Spokane to Lisbon is 19h 10m on average. Lisbon is the most popular airport in Portugal.

What airlines fly to Portugal?

Delta, British Airways and United Airlines are the top three most popular airlines that fly to Portugal from State of Washington according to our data. Delta is the first choice among our users, with 36% 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.

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 August 2026, there are 14 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 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington to Portugal

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:35 pm - 12:50 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

14h 15m1 stop Reykjavik Keflavik Intl

11:35 am - 5:00 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

13h 25m1 stop Reykjavik Keflavik Intl

$694Icelandair

Sat, Jan 30 - Tue, Feb 9

10:00 am - 10:40 amPDX Portland-LIS Lisbon Humberto Delgado

16h 40m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

5:00 am - 6:31 pmLIS Lisbon Humberto Delgado-PDX Portland

21h 31m2 stops Frankfurt am Main Vancouver Intl

$711Multiple Airlines

Mon, Nov 2 - Tue, Nov 24

10:10 am - 9:20 amSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

15h 10m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

5:00 am - 6:22 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

21h 22m2 stops Frankfurt am Main Vancouver Intl

$717Multiple Airlines

Mon, Feb 1 - Tue, Feb 23

3:50 pm - 1:30 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

14h 40m1 stop Munich Franz Josef Strauss

5:00 am - 12:00 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

15h 00m1 stop Frankfurt am Main

$724Lufthansa

Wed, Oct 28 - Wed, Nov 25

2:50 pm - 11:30 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

24h 40m1 stop Munich Franz Josef Strauss

5:00 am - 12:00 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

15h 00m1 stop Frankfurt am Main

$724Lufthansa

Wed, Nov 4 - Wed, Nov 18

6:04 am - 10:35 amPDX Portland-OPO Porto

20h 31m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 11:20 amOPO Porto-PDX Portland

14h 20m1 stop Amsterdam Schiphol

$737Delta

Mon, Feb 1 - Wed, Feb 24

1:20 pm - 10:30 amPDX Portland-OPO Porto

13h 10m1 stop Amsterdam Schiphol

5:00 am - 11:20 amOPO Porto-PDX Portland

14h 20m1 stop Amsterdam Schiphol

$737KLM

Mon, Feb 1 - Wed, Feb 24

6:04 am - 10:35 amPDX Portland-OPO Porto

20h 31m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 6:43 pmOPO Porto-PDX Portland

21h 43m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$747Delta

Mon, Feb 1 - Wed, Feb 24

3:40 pm - 1:50 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

14h 10m1 stop Reykjavik Keflavik Intl

3:00 pm - 8:40 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

13h 40m1 stop Reykjavik Keflavik Intl

$751Icelandair

Sat, Oct 3 - Sun, Oct 18

7:05 am - 9:05 amPDX Portland-OPO Porto

18h 00m1 stop New York John F Kennedy Intl

5:00 am - 11:20 amOPO Porto-PDX Portland

14h 20m1 stop Amsterdam Schiphol

$823KLM

Wed, Nov 25 - Mon, Nov 30

Cheap last minute flights

Enter your travel dates to find the best prices.

11:15 am - 9:45 amPDX Portland-OPO Porto

14h 30m1 stop Newark

11:20 am - 11:28 amOPO Porto-PDX Portland

32h 08m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$962United Airlines

Tue, Aug 11 - Wed, Aug 26

11:15 am - 9:45 amPDX Portland-OPO Porto

14h 30m1 stop Newark

12:15 pm - 3:56 pmOPO Porto-PDX Portland

35h 41m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$962United Airlines

Tue, Aug 11 - Tue, Aug 25

7:00 am - 10:30 amPDX Portland-OPO Porto

19h 30m1 stop New York John F Kennedy Intl

11:35 am - 11:10 amOPO Porto-PDX Portland

31h 35m1 stop Amsterdam Schiphol

$965Delta

Tue, Aug 11 - Thu, Aug 27

7:00 am - 10:30 amPDX Portland-OPO Porto

19h 30m1 stop New York John F Kennedy Intl

11:45 am - 11:10 amOPO Porto-PDX Portland

31h 25m1 stop Amsterdam Schiphol

$965Delta

Tue, Aug 11 - Wed, Aug 26

3:30 pm - 3:40 pmPDX Portland-OPO Porto

40h 10m2 stops Vancouver Intl Frankfurt am Main

11:50 am - 8:59 pmOPO Porto-PDX Portland

41h 09m2 stops Montreal Pierre Elliott Trudeau Intl San Francisco

$978Air Canada

Tue, Aug 11 - Thu, Aug 27

10:10 am - 3:45 pmPDX Portland-OPO Porto

21h 35m2 stops Vancouver Intl Frankfurt am Main

4:35 pm - 10:45 pmOPO Porto-PDX Portland

38h 10m2 stops Frankfurt am Main San Francisco

$1,020Lufthansa

Tue, Aug 11 - Mon, Aug 24

10:10 am - 3:45 pmPDX Portland-OPO Porto

21h 35m2 stops Vancouver Intl Frankfurt am Main

11:20 am - 7:11 pmOPO Porto-PDX Portland

39h 51m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

$1,061Lufthansa

Tue, Aug 11 - Sat, Aug 22

8:20 pm - 5:55 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

13h 35m1 stop London Heathrow

7:20 am - 6:25 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

19h 05m1 stop London Heathrow

$1,075British Airways

Tue, Aug 11 - Wed, Aug 19

8:10 am - 9:05 amSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

16h 55m1 stop Philadelphia

11:05 am - 8:35 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

17h 30m2 stops Philadelphia Cincinnati Cinci./N. Kentucky

$1,082American Airlines

Tue, Aug 11 - Wed, Aug 19

7:30 pm - 11:00 pmPDX Portland-LIS Lisbon Humberto Delgado

19h 30m1 stop London Heathrow

6:45 pm - 11:59 pmLIS Lisbon Humberto Delgado-PDX Portland

37h 14m2 stops London Heathrow Chicago O'Hare Intl

$1,131British Airways

Tue, Aug 11 - Tue, Aug 18

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

United Airlines flights from State of Washington to Portugal

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

United Airlines

Nov 4

SEA6:45 amSeattle/Tacoma Intl

17h 25m

1 stop

LIS8:10 amLisbon Humberto Delgado

Nov 18

LIS5:00 amLisbon Humberto Delgado

15h 00m

1 stop

SEA12:00 pmSeattle/Tacoma Intl

$744

United Airlines

Oct 27

SEA8:09 amSeattle/Tacoma Intl

18h 56m

1 stop

LIS10:05 amLisbon Humberto Delgado

Nov 24

LIS12:50 pmLisbon Humberto Delgado

31h 29m

2 stops

SEA12:19 pmSeattle/Tacoma Intl

$746

United Airlines

Nov 4

SEA7:00 amSeattle/Tacoma Intl

19h 20m

2 stops

LIS10:20 amLisbon Humberto Delgado

Nov 18

LIS5:00 amLisbon Humberto Delgado

15h 00m

1 stop

SEA12:00 pmSeattle/Tacoma Intl

$748

Icelandair flights from State of Washington to Portugal

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

Icelandair

Jan 30

SEA2:35 pmSeattle/Tacoma Intl

14h 15m

1 stop

LIS12:50 pmLisbon Humberto Delgado

Feb 9

LIS11:35 amLisbon Humberto Delgado

13h 25m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

$694

Icelandair

Oct 4

SEA7:00 pmSeattle/Tacoma Intl

34h 50m

1 stop

LIS1:50 pmLisbon Humberto Delgado

Oct 18

LIS3:00 pmLisbon Humberto Delgado

13h 40m

1 stop

SEA8:40 pmSeattle/Tacoma Intl

$753

Icelandair

Oct 11

SEA7:00 pmSeattle/Tacoma Intl

34h 50m

1 stop

LIS1:50 pmLisbon Humberto Delgado

Oct 20

LIS3:00 pmLisbon Humberto Delgado

13h 40m

1 stop

SEA8:40 pmSeattle/Tacoma Intl

$760

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sat 1/30

2:35 pm-12:50 pm

1 stop14h 15m

Lisbon Humberto Delgado

Tue 2/9

11:35 am-5:00 pm

1 stop13h 25m

$694

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Mon 11/2

10:00 am-10:40 am

2 stops16h 40m

Lisbon Humberto Delgado

Tue 11/24

5:00 am-6:31 pm

2 stops21h 31m

$711

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Mon 2/1

10:10 am-9:20 am

2 stops15h 10m

Lisbon Humberto Delgado

Tue 2/23

5:00 am-6:22 pm

2 stops21h 22m

$717

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 10/28

3:50 pm-1:30 pm

1 stop14h 40m

Lisbon Humberto Delgado

Wed 11/25

5:00 am-12:00 pm

1 stop15h 00m

$724

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 11/4

2:50 pm-11:30 pm

1 stop24h 40m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-12:00 pm

1 stop15h 00m

$724

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 2/1

6:04 am-10:35 am

2 stops20h 31m

Porto

Wed 2/24

5:00 am-11:20 am

1 stop14h 20m

$737

Quickest round-trip

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 2/1

1:20 pm-10:30 am

1 stop13h 10m

Porto

Wed 2/24

5:00 am-11:20 am

1 stop14h 20m

$737

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 2/1

6:04 am-10:35 am

2 stops20h 31m

Porto

Wed 2/24

5:00 am-6:43 pm

2 stops21h 43m

$747

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sat 10/3

3:40 pm-1:50 pm

1 stop14h 10m

Lisbon Humberto Delgado

Sun 10/18

3:00 pm-8:40 pm

1 stop13h 40m

$751

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Wed 11/25

7:05 am-9:05 am

1 stop18h 00m

Porto

Mon 11/30

5:00 am-11:20 am

1 stop14h 20m

$823

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

Airlines

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 $500, 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 February instead. Flights to Portugal in February, while not as cheap as those in January, still average around $583.

How far in advance should I book a flight from Washington 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 $848 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 $713 on momondo.

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

You could potentially save up to 9% 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	14h 00m
Direct flights	None

The fastest flight from State of Washington to Portugal takes 14h 00m

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

Frequently asked questions about flying 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 August 2026, there are 14 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 $348	Free Cancellation	Rating 6.9 728 reviews	Search Icelandair flights
Lufthansa	PriceFrom $475	Free Cancellation	Rating 6.8 8,176 reviews	Search Lufthansa flights
KLM	PriceFrom $481	Free Cancellation	Rating 7.8 1,555 reviews	Search KLM flights
British Airways	PriceFrom $482	Free Cancellation	Rating 6.7 8,155 reviews	Search British Airways flights
United Airlines	PriceFrom $486	Free Cancellation	Rating 7.4 10,102 reviews	Search United Airlines flights
American Airlines	PriceFrom $497	Free Cancellation	Rating 7.1 11,904 reviews	Search American Airlines flights
Air France	PriceFrom $504	Free Cancellation	Rating 7.5 1,640 reviews	Search Air France flights
Delta	PriceFrom $505	Free Cancellation	Rating 7.8 8,505 reviews	Search Delta flights
Aer Lingus	PriceFrom $523	Free Cancellation	Rating 7.3 1,693 reviews	Search Aer Lingus flights
Air Canada	PriceFrom $543	Free Cancellation	Rating 7.1 11,462 reviews	Search Air Canada 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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Wed 9/9

Wed 9/16

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal

Popular cities

Other flights from Washington

Other flights to Portugal

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in Portugal

Flights to Lisbonfrom $552

Flights to Portofrom $514

Flights to Funchalfrom $605

Flights to Farofrom $626

Flights to Ponta Delgadafrom $575

Flights to Lajesfrom $605

Flights to Hortafrom $670

Flights to Pico Islandfrom $668

Flights to Porto Santofrom $713

Flights to Velasfrom $690

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 10/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Washington to Portugal

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

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

momondo Fare Finder

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

See travel insights to Portugal from

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

What is the cheapest month to fly to Portugal?

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

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

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

What airlines fly to Portugal?

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

Cheap State of Washington to Portugal flight deals and tips

Fastest flight time

Direct flights

Frequently asked questions about flying from Washington 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?

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

State of Washington flight routes

According to popular flight searches on momondo this year

Portugal flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Portugal

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Portugal

List of cabin classes available on flights landing in Portugal. Availability may vary depending on flight origin and airline.

Complete your trip to Portugal

Explore popular destinations other users love

According to popular flight searches on momondo this year