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$313+ Cheap flights from Portugal to Washington

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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SEA
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Portugal to Washington

Keep the following information in mind while searching for Portugal to Washington flight deals. Data was last updated June 12, 2025.

Round-trip from

$709
(FlightHub)

One-way from

$313
(Kiwi.com)

Popular in

August

Cheapest in

December

Average price

$1,112
From Portugal to Washington
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One-way flight from Portugal to Washington
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Highest demand for flights based on searches. 10% potential increase in price ($105 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Portugal to Washington

Cheapest flights from Portugal to Washington
Explore the most affordable flight options available from Portugal to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/227:15 amLIS - SEA
1 stop14h 45mMultiple Airlines
Tue 10/287:20 amSEA - LIS
2 stops25h 45mMultiple Airlines
Deal found 6/9$709
This American Airlines deal was found by Cheapflights users on 6/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2211:05 amLIS - SEA
1 stop18h 39mAmerican Airlines
Wed 10/297:50 pmSEA - LIS
1 stop19h 00mAmerican Airlines
Deal found 6/9$758
This British Airways deal was found by Cheapflights users on 6/11. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/174:30 pmLIS - SEA
1 stop27h 05mBritish Airways
Wed 10/221:30 pmSEA - LIS
1 stop20h 25mBritish Airways
Deal found 6/11$759
This Delta deal was found by Cheapflights users on 6/12. 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.
Fri 10/175:00 amLIS - SEA
1 stop14h 50mDelta
Wed 10/226:00 amSEA - LIS
2 stops21h 15mDelta
Deal found 6/12$761
This flugladen.de deal was found by Cheapflights users on 6/12. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/198:20 pmOPO - SEA
1 stop23h 20mKLM
Mon 6/235:35 pmSEA - OPO
1 stop33h 05mKLM
Deal found 6/12$779
This British Airways deal was found by Cheapflights users on 6/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/199:55 amOPO - SEA
1 stop16h 25mBritish Airways
Mon 6/238:20 pmSEA - OPO
1 stop15h 30mBritish Airways
Deal found 6/10$783
This Delta deal was found by Cheapflights users on 6/12. 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.
Thu 6/196:30 amOPO - SEA
2 stops25h 23mDelta
Mon 6/235:35 pmSEA - OPO
1 stop16h 20mDelta
Deal found 6/12$787
This lol.travel deal was found by Cheapflights users on 6/10. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/306:00 amOPO - SEA
1 stop13h 55mLufthansa
Mon 12/222:00 pmSEA - OPO
1 stop16h 55mLufthansa
Deal found 6/10$825
This United Airlines deal was found by Cheapflights users on 6/10. 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 10/16:00 amOPO - SEA
1 stop13h 55mUnited Airlines
Thu 12/2511:50 pmSEA - OPO
2 stops30h 55mUnited Airlines
Deal found 6/10$846
This Air Canada deal was found by Cheapflights users on 6/9. 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 10/205:05 amLIS - SEA
2 stops36h 16mAir Canada
Wed 10/298:20 pmSEA - LIS
2 stops30h 00mAir Canada
Deal found 6/9$848
This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/198:05 amOPO - SEA
2 stops20h 35mMultiple Airlines
Mon 6/233:45 pmSEA - OPO
2 stops19h 00mMultiple Airlines
Deal found 6/10$855
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/263:00 pmLIS - PDX
2 stops53h 14mMultiple Airlines
Thu 7/109:00 amPDX - LIS
1 stop17h 05mMultiple Airlines
Deal found 6/10$861

Cheapflights Fare Finder

Customize your flight search to find flights from Portugal to Washington 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 June 12, 2025.
Use the filters below to find and compare flights from Portugal to Washington that are best for you.

Fly from

Portugal

Fly to

Washington

Route

Depart

Return

Price

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 10/22

7:15 am-2:00 pm

1 stop14h 45m

Seattle/Tacoma Intl

Tue 10/28

7:20 am-4:05 pm

2 stops25h 45m

$709

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 10/22

11:05 am-9:44 pm

1 stop18h 39m

Seattle/Tacoma Intl

Wed 10/29

7:50 pm-9:50 pm

1 stop19h 00m

$758

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 10/17

4:30 pm-11:35 am

1 stop27h 05m

Seattle/Tacoma Intl

Wed 10/22

1:30 pm-5:55 pm

1 stop20h 25m

$759

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 10/17

5:00 am-11:50 am

1 stop14h 50m

Seattle/Tacoma Intl

Wed 10/22

6:00 am-11:15 am

2 stops21h 15m

$761

PortoSeattle

OPO - SEA

OPOSEA

Porto

Tue 9/30

6:00 am-11:55 am

1 stop13h 55m

Seattle/Tacoma Intl

Mon 12/22

2:00 pm-2:55 pm

1 stop16h 55m

$825

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 10/1

6:00 am-11:55 am

1 stop13h 55m

Seattle/Tacoma Intl

Thu 12/25

11:50 pm-2:45 pm

2 stops30h 55m

$846

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Mon 10/20

5:05 am-9:21 am

2 stops36h 16m

Seattle/Tacoma Intl

Wed 10/29

8:20 pm-9:20 am

2 stops30h 00m

$848

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Thu 6/26

3:00 pm-12:14 pm

2 stops53h 14m

Portland

Thu 7/10

9:00 am-10:05 am

1 stop17h 05m

$861

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Fri 10/17

5:55 am-6:36 pm

2 stops20h 41m

Seattle/Tacoma Intl

Wed 10/22

1:45 pm-2:45 pm

2 stops17h 00m

$869

PortoSeattle

OPO - SEA

OPOSEA

Porto

Mon 9/29

12:10 pm-10:16 pm

2 stops42h 06m

Seattle/Tacoma Intl

Thu 12/25

8:20 pm-2:45 pm

2 stops34h 25m

$882

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 54 results
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Best time to book a flight from Portugal to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Portugal 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 Portugal to Washington

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

Currently, January is the cheapest month in which you can book a flight from Portugal to State of Washington (average of $238). Flying from Portugal to State of Washington in July is currently the most expensive (average of $391). 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 PT to WA?

Find hourly flight availability from Portugal to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

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

Rainfall in Washington by month

Plan your trip to Washington by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

Temperature in Washington by month

Plan your trip to Washington by taking into account the average temperature totals by month.

If weather is an important factor for your trip to State of Washington, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated June 12, 2025.
See what other customers who have flown with Delta, KLM and Finnair from Portugal to Washington have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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

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

    The cheapest airline one-way is Icelandair, with whom users have recently found tickets for as low as $519. However, be on the lookout for offers from Aer Lingus and Turkish Airlines, as they are both options that can get you from Portugal to State of Washington for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portugal to Washington 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 Portugal to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from Portugal to State of Washington (average of $238). Flying from Portugal to State of Washington in July is currently the most expensive (average of $391). 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 Portugal to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Portugal to Washington

Discover the top 6 airlines that operate flights from Portugal to Washington. 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$717Average$823FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$720Average$1,074FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$738Average$867FlexibilityNo cancel feeOn-time69%
KLMCheapest$756Average$848FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$762Average$1,067FlexibilityNo cancel feeOn-time77%
DeltaCheapest$775Average$859FlexibilityNo cancel feeOn-timeN/A

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