HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$274+ Cheap flights from Washington to Portugal

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Portugal with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from Washington to Portugal

Cheapest flights from Washington to Portugal
Explore the most affordable flight options available from Washington to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 30, 2025.

This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/292:45 pmPDX - LIS
1 stop21h 35mIcelandair
dom. 12/149:20 pmLIS - PDX
1 stop27h 40mIcelandair
Deal found 10/30$368
This Air France deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/11:25 pmPDX - OPO
1 stop18h 00mKLM
mar. 12/94:10 pmOPO - PDX
1 stop27h 15mKLM
Deal found 10/30$483
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/288:20 amPDX - OPO
2 stops17h 10mUnited Airlines
vie. 12/1212:30 pmOPO - PDX
2 stops20h 07mUnited Airlines
Deal found 10/30$488
This KLM deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/299:30 amSEA - OPO
2 stops17h 00mMultiple Airlines
sáb. 12/69:25 amOPO - SEA
2 stops21h 00mMultiple Airlines
Deal found 10/30$492
This KLM deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/281:25 pmPDX - OPO
1 stop18h 00mKLM
vie. 12/1211:20 amOPO - PDX
2 stops18h 50mKLM
Deal found 10/30$499
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/311:19 amGEG - LIS
2 stops19h 51mDelta
dom. 12/711:25 amLIS - GEG
2 stops41h 31mDelta
Deal found 10/29$500
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/110:05 amPDX - OPO
2 stops20h 50mMultiple Airlines
mar. 12/912:30 pmOPO - PDX
2 stops20h 07mMultiple Airlines
Deal found 10/30$503
This Orbitz deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/268:10 amSEA - LIS
1 stop16h 45mMultiple Airlines
lun. 12/12:10 pmLIS - SEA
2 stops37h 06mMultiple Airlines
Deal found 10/28$505
This Finnair deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/3112:03 pmSEA - LIS
1 stop13h 42mMultiple Airlines
vie. 11/711:05 amLIS - SEA
1 stop19h 15mMultiple Airlines
Deal found 10/28$506
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/302:00 pmSEA - LIS
1 stop16h 30mUnited Airlines
mar. 2/1711:20 amLIS - SEA
2 stops39h 43mUnited Airlines
Deal found 10/28$507
This Air Canada deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/18:00 pmSEA - LIS
2 stops29h 20mAir Canada
lun. 12/85:00 amLIS - SEA
2 stops25h 16mAir Canada
Deal found 10/28$508
This KAYAK deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/302:00 pmSEA - LIS
1 stop16h 30mLufthansa
mar. 2/172:10 pmLIS - SEA
1 stop31h 10mLufthansa
Deal found 10/28$509

Cheap flight deals from Washington to Portugal

Keep the following information in mind while searching for Washington to Portugal flight deals. Data was last updated octubre 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$368
(Mytrip)

One-way from

$274
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$818
Provider with most accurate pricing for Seattle/Tacoma Intl-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Lisbon Humberto Delgado flights.
Search Deals
From Washington to Portugal
Search Deals
One-way flight from Washington to Portugal
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($216 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated octubre 30, 2025.
Use the filters below to find and compare flights from Washington to Portugal that are best for you.

Fly from

Washington

Fly to

Portugal

Route

Depart

Return

Price

PortlandPorto

PDX - OPO

PDXOPO

Portland

lun. 12/1

1:25 pm-3:25 pm

1 stop18h 00m

Porto

mar. 12/9

4:10 pm-11:25 am

1 stop27h 15m

$483

PortlandLisbon

PDX - LIS

PDXLIS

Portland

mié. 2/18

7:00 am-8:00 am

1 stop17h 00m

Lisbon Humberto Delgado

mié. 2/25

5:00 am-11:25 am

1 stop14h 25m

$486

PortlandLisbon

PDX - LIS

PDXLIS

Portland

jue. 2/5

7:00 am-8:00 am

1 stop17h 00m

Lisbon Humberto Delgado

vie. 2/20

5:00 am-11:25 am

1 stop14h 25m

$486

PortlandPorto

PDX - OPO

PDXOPO

Portland

vie. 11/28

8:20 am-9:30 am

2 stops17h 10m

Porto

vie. 12/12

12:30 pm-12:37 am

2 stops20h 07m

$488

PortlandLisbon

PDX - LIS

PDXLIS

Portland

mié. 2/4

7:00 am-3:10 pm

2 stops24h 10m

Lisbon Humberto Delgado

mié. 2/25

5:00 am-11:25 am

1 stop14h 25m

$490

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

sáb. 11/29

9:30 am-10:30 am

2 stops17h 00m

Porto

sáb. 12/6

9:25 am-10:25 pm

2 stops21h 00m

$492

PortlandPorto

PDX - OPO

PDXOPO

Portland

vie. 11/28

1:25 pm-3:25 pm

1 stop18h 00m

Porto

vie. 12/12

11:20 am-10:10 pm

2 stops18h 50m

$499

PortlandLisbon

PDX - LIS

PDXLIS

Portland

mié. 1/14

7:00 am-11:20 am

2 stops20h 20m

Lisbon Humberto Delgado

lun. 2/2

5:00 am-4:30 pm

2 stops19h 30m

$500

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

mié. 1/14

11:22 am-3:10 pm

2 stops19h 48m

Lisbon Humberto Delgado

mié. 2/11

5:00 am-7:59 pm

2 stops22h 59m

$500

PortlandLisbon

PDX - LIS

PDXLIS

Portland

sáb. 1/24

7:00 am-3:10 pm

2 stops24h 10m

Lisbon Humberto Delgado

dom. 2/1

5:00 am-6:50 pm

2 stops21h 50m

$500

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Washington to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Portugal

What is the cheapest month to book a flight from State of Washington to Portugal?

Currently, January is the cheapest month in which you can book a flight from State of Washington to Portugal (average of $351). Flying from State of Washington to Portugal in June is currently the most expensive (average of $975). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WA to PT?

Find hourly flight availability from Washington to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octubre 30, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 44% on flights from State of Washington to Portugal by exploring options for tickets in the afternoon.

What is the cheapest day to fly from State of Washington to Portugal?

Use this chart to determine the cheapest time to fly round-trip from Washington to Portugal. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Portugal flight should consider departing on Tuesday mornings when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Washington to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    There are many flights that can get you from State of Washington to Portugal in 17h 10m. Fly via KLM, United Airlines, or Delta to get the fastest option. The distance from State of Washington to Portugal is about 5183 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from State of Washington to Portugal one-way?

    For one-way options, check prices for Scandinavian Airlines. According to our data, you can fly for as low as $308. Users have also found prices from $323 and $328 on Air Canada and United Airlines, respectively.

  • Can I find deals for flights from Washington to Portugal that include hotel bookings?

    Yes. In addition to deals on Washington to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Portugal.

  • Can I find deals for business class flights from Washington to Portugal?

    Yes. Cheapflights offers flight deals from Washington to Portugal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Portugal?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Portugal (average of $351). Flying from State of Washington to Portugal in June is currently the most expensive (average of $975). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Charles de Gaulle flights
Newark to Charles de Gaulle flights
John F Kennedy Intl to Gatwick flights
John F Kennedy Intl to Leonardo da Vinci/Fiumicino flights
LaGuardia to Heathrow flights
John F Kennedy Intl to London City flights
Boston to Heathrow flights
Newark to Orly flights
Newark to Gatwick flights
John F Kennedy Intl to Istanbul flights
Newark to Leonardo da Vinci/Fiumicino flights
John F Kennedy Intl to Orly flights
Miami to Madrid flights
Dulles Intl to Heathrow flights
John F Kennedy Intl to Madrid flights
Los Angeles to Heathrow flights
Newark to Madrid flights
John F Kennedy Intl to Stansted flights
LaGuardia to Charles de Gaulle flights
LaGuardia to Gatwick flights
John F Kennedy Intl to Luton flights
San Francisco to Heathrow flights
Newark to London City flights
John F Kennedy Intl to Barcelona-El Prat flights
Newark to Barcelona-El Prat flights
Los Angeles to Charles de Gaulle flights
John F Kennedy Intl to Malpensa flights
Dallas/Fort Worth to Heathrow flights
O'Hare Intl to Heathrow flights
John F Kennedy Intl to Lisbon flights
John F Kennedy Intl to Dublin flights
Boston to Charles de Gaulle flights
Newark to Malpensa flights
Newark to Istanbul flights
Baltimore to Heathrow flights
Newark to Dublin flights
Newark to Lisbon flights
O'Hare Intl to Charles de Gaulle flights
Dulles Intl to Charles de Gaulle flights
Newark to Luton flights
Seattle to Heathrow flights
O'Hare Intl to Frankfurt flights
Dulles Intl to Madrid flights
Newark to Stansted flights
San Francisco to Charles de Gaulle flights
John F Kennedy Intl to Amsterdam flights
Dallas/Fort Worth to Frankfurt flights
LaGuardia to Leonardo da Vinci/Fiumicino flights

Top 10 airlines flying from Washington to Portugal

Discover the top 10 airlines that operate flights from Washington to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$357Average$603FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$517Average$1,018FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$543Average$1,024FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$544Average$1,185FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$551Average$1,000FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$560Average$965FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$627Average$1,040FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$627Average$966FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$632Average$1,010FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$646Average$789FlexibilityNo cancel feeOn-time77%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.