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$264+ 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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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 September 15, 2025.

Round-trip from

$544
(Flighttix)

One-way from

$264
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$881
From Washington to Portugal
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One-way flight from Washington to Portugal
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Highest demand for flights based on searches. 16% potential increase in price ($192 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 15, 2025.

This Flighttix deal was found by Cheapflights users on 9/15. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/17:00 pmPDX - LIS
2 stops29h 55mAir Canada
Fri 12/1211:20 amLIS - PDX
2 stops29h 55mAir Canada
Deal found 9/15$544
This Mytrip deal was found by Cheapflights users on 9/14. 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.
Tue 10/147:15 amSEA - OPO
2 stops23h 45mMultiple Airlines
Tue 10/2110:50 pmOPO - SEA
3 stops30h 55mMultiple Airlines
Deal found 9/14$546
This Air Canada deal was found by Cheapflights users on 9/14. 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.
Sat 10/187:40 pmPDX - LIS
2 stops29h 40mAir Canada
Thu 11/65:00 amLIS - PDX
2 stops21h 30mAir Canada
Deal found 9/14$552
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 11/196:20 amSEA - OPO
1 stop19h 10mUnited Airlines
Tue 11/256:00 amOPO - SEA
2 stops37h 11mUnited Airlines
Deal found 9/14$552
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 11/115:10 amGEG - LIS
2 stops20h 10mUnited Airlines
Tue 11/1811:20 amLIS - GEG
2 stops32h 11mUnited Airlines
Deal found 9/15$552
This Air Canada deal was found by Cheapflights users on 9/15. 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.
Mon 12/17:00 pmPDX - LIS
2 stops29h 55mAir Canada
Thu 12/115:00 amLIS - PDX
2 stops21h 30mAir Canada
Deal found 9/15$553
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Mon 10/2711:12 pmPDX - OPO
1 stop27h 18mUnited Airlines
Wed 11/1212:35 pmOPO - PDX
1 stop17h 35mUnited Airlines
Deal found 9/13$555
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 12/25:00 amPDX - LIS
2 stops19h 55mUnited Airlines
Wed 12/1011:00 amLIS - PDX
2 stops32h 48mUnited Airlines
Deal found 9/15$557
This United deal was found by Cheapflights users on 9/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1611:12 pmPDX - LIS
1 stop24h 58mMultiple Airlines
Wed 11/2611:20 amLIS - PDX
2 stops39h 10mMultiple Airlines
Deal found 9/14$558
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Mon 10/2010:17 pmPDX - LIS
1 stop26h 03mUnited Airlines
Wed 11/55:00 amLIS - PDX
2 stops25h 10mUnited Airlines
Deal found 9/14$559
This Air Canada deal was found by Cheapflights users on 9/15. 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.
Mon 12/13:15 pmPDX - LIS
2 stops33h 40mAir Canada
Tue 12/911:20 amLIS - PDX
2 stops53h 55mAir Canada
Deal found 9/15$560
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Tue 11/117:00 amPDX - OPO
2 stops18h 30mMultiple Airlines
Thu 11/2012:30 pmOPO - PDX
2 stops19h 56mMultiple Airlines
Deal found 9/14$560

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 September 15, 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

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Wed 11/19

6:20 am-9:30 am

1 stop19h 10m

Porto

Tue 11/25

6:00 am-11:11 am

2 stops37h 11m

$552

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Tue 11/11

5:10 am-9:20 am

2 stops20h 10m

Lisbon Humberto Delgado

Tue 11/18

11:20 am-11:31 am

2 stops32h 11m

$552

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 10/27

5:00 am-9:30 am

2 stops21h 30m

Porto

Wed 11/12

12:35 pm-10:10 pm

1 stop17h 35m

$555

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Tue 12/2

5:00 am-8:55 am

2 stops19h 55m

Lisbon Humberto Delgado

Wed 12/10

11:00 am-11:48 am

2 stops32h 48m

$557

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sun 11/16

11:12 pm-8:10 am

1 stop24h 58m

Lisbon Humberto Delgado

Wed 11/26

11:20 am-6:30 pm

2 stops39h 10m

$558

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 11/11

7:00 am-9:30 am

2 stops18h 30m

Porto

Thu 11/20

12:30 pm-12:26 am

2 stops19h 56m

$560

SeattleFunchal

SEA - FNC

SEAFNC

Seattle/Tacoma Intl

Mon 10/20

8:20 pm-11:10 am

1 stop30h 50m

Funchal Madeira

Wed 11/5

3:55 pm-4:55 pm

1 stop33h 00m

$563

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Tue 1/27

5:00 am-8:10 am

2 stops19h 10m

Lisbon Humberto Delgado

Wed 2/4

11:20 am-7:01 pm

2 stops39h 41m

$563

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 11/11

8:30 am-9:30 am

2 stops17h 00m

Porto

Thu 11/20

12:35 pm-10:10 pm

1 stop17h 35m

$563

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Mon 11/17

8:20 am-10:15 am

1 stop17h 55m

Lisbon Humberto Delgado

Thu 11/27

5:00 am-12:46 am

2 stops27h 46m

$566

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 results
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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 $612). Flying from State of Washington to Portugal in June is currently the most expensive (average of $1,127). 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 September 15, 2025.

When flying from State of Washington to Portugal, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 19h 10m. Fly via United Airlines, British Airways, or SWISS to get the fastest option. The distance from State of Washington to Portugal is about 5083 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 Lufthansa. According to our data, you can fly for as low as $295. Users have also found prices from $309 and $314 on Scandinavian Airlines 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 $612). Flying from State of Washington to Portugal in June is currently the most expensive (average of $1,127). 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

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Alternative routes for Washington to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$466Average$644FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$543Average$1,032FlexibilityNo cancel feeOn-time67%
British AirwaysCheapest$563Average$1,017FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$573Average$971FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$603Average$965FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$610Average$1,187FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$611Average$1,082FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$629Average$1,056FlexibilityNo cancel feeOn-time71%
KLMCheapest$632Average$965FlexibilityNo cancel feeOn-time75%
DeltaCheapest$647Average$1,110FlexibilityNo cancel feeOn-timeN/A

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