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$301+ 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 6/18. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SEA
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
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 April 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$490
(Booking.com)

One-way from

$301
(Kiwi.com)

Popular in

July

Cheapest in

April

Average price

$794
Provider with most accurate pricing for Lisbon Humberto Delgado-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Seattle/Tacoma Intl flights.
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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. 16% potential increase in price ($194 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 2, 2025.

This FlightHub deal was found by Cheapflights users on 3/31. 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.
Fri 9/56:55 amLIS - SEA
1 stop14h 55mMultiple Airlines
Fri 9/194:20 pmSEA - LIS
1 stop32h 40mMultiple Airlines
Deal found 3/31$598
This American Airlines deal was found by Cheapflights users on 4/1. 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.
Thu 5/17:20 amLIS - PDX
1 stop18h 15mAmerican Airlines
Thu 5/227:25 pmPDX - LIS
1 stop19h 35mAmerican Airlines
Deal found 4/1$744
This British Airways deal was found by Cheapflights users on 3/31. 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.
Tue 4/154:30 pmLIS - SEA
1 stop27h 05mBritish Airways
Tue 4/221:30 pmSEA - LIS
1 stop20h 25mBritish Airways
Deal found 3/31$747
This Mytrip deal was found by Cheapflights users on 4/1. 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.
Thu 5/88:50 amOPO - SEA
3 stops47h 20mMultiple Airlines
Mon 5/193:45 pmSEA - OPO
2 stops23h 20mMultiple Airlines
Deal found 4/1$753
This 123 Milhas deal was found by Cheapflights users on 4/1. 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 123 Milhas is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/24:30 pmLIS - SEA
1 stop32h 45mTurkish Airlines
Mon 6/167:10 pmSEA - LIS
1 stop20h 25mTurkish Airlines
Deal found 4/1$761
This Delta deal was found by Cheapflights users on 4/1. 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 5/225:00 amLIS - SEA
1 stop14h 40mDelta
Fri 5/309:30 amSEA - LIS
2 stops21h 05mDelta
Deal found 4/1$763
This Delta deal was found by Cheapflights users on 4/1. 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 5/86:30 amOPO - SEA
1 stop17h 27mDelta
Mon 5/1910:25 amSEA - OPO
2 stops21h 05mDelta
Deal found 4/1$771
This KLM deal was found by Cheapflights users on 4/1. 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.
Thu 5/86:30 amOPO - SEA
1 stop17h 27mKLM
Mon 5/196:07 pmSEA - OPO
1 stop15h 48mKLM
Deal found 4/1$777
This KLM deal was found by Cheapflights users on 3/31. 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.
Thu 5/13:35 pmLIS - SEA
1 stop28h 05mKLM
Sat 5/176:07 pmSEA - LIS
1 stop20h 43mKLM
Deal found 3/31$782
This British Airways deal was found by Cheapflights users on 4/1. 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 5/87:20 amLIS - PDX
2 stops23h 39mBritish Airways
Thu 5/227:25 pmPDX - LIS
1 stop19h 40mBritish Airways
Deal found 4/1$784
This Delta deal was found by Cheapflights users on 4/1. 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 5/15:00 amLIS - PDX
2 stops22h 10mDelta
Tue 5/63:10 pmPDX - LIS
2 stops18h 40mDelta
Deal found 4/1$785
This Air France deal was found by Cheapflights users on 3/31. 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.
Mon 6/26:50 pmLIS - SEA
1 stop24h 25mAir France
Mon 6/167:50 amSEA - LIS
1 stop18h 55mAir France
Deal found 3/31$796

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 April 2, 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

Thu 5/22

12:10 pm-1:50 pm

1 stop33h 40m

Seattle/Tacoma Intl

Fri 5/30

4:00 pm-9:00 am

1 stop33h 00m

$723

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Thu 5/1

7:20 am-5:35 pm

1 stop18h 15m

Portland

Thu 5/22

7:25 pm-11:00 pm

1 stop19h 35m

$744

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Tue 4/15

4:30 pm-11:35 am

1 stop27h 05m

Seattle/Tacoma Intl

Tue 4/22

1:30 pm-5:55 pm

1 stop20h 25m

$747

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 5/8

8:50 am-12:10 am

3 stops47h 20m

Seattle/Tacoma Intl

Mon 5/19

3:45 pm-11:05 pm

2 stops23h 20m

$753

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Mon 6/2

4:30 pm-5:15 pm

1 stop32h 45m

Seattle/Tacoma Intl

Mon 6/16

7:10 pm-11:35 pm

1 stop20h 25m

$761

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 5/22

5:00 am-11:40 am

1 stop14h 40m

Seattle/Tacoma Intl

Fri 5/30

9:30 am-2:35 pm

2 stops21h 05m

$763

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 5/8

6:30 am-3:57 pm

1 stop17h 27m

Seattle/Tacoma Intl

Mon 5/19

10:25 am-3:30 pm

2 stops21h 05m

$771

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 5/8

6:30 am-3:57 pm

1 stop17h 27m

Seattle/Tacoma Intl

Mon 5/19

6:07 pm-5:55 pm

1 stop15h 48m

$777

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 5/1

3:35 pm-11:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Sat 5/17

6:07 pm-10:50 pm

1 stop20h 43m

$782

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Thu 5/8

7:20 am-10:59 pm

2 stops23h 39m

Portland

Thu 5/22

7:25 pm-11:05 pm

1 stop19h 40m

$784

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 46 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 $411). 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 April 2, 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 April 2, 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
7,899 reviews

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,323 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,572 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air France
7.4
Good
1,427 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 Turkish Airlines, with whom users have recently found tickets for as low as $643. However, be on the lookout for offers from Aer Lingus and Finnair, 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 $411). 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 5 airlines flying from Portugal to Washington

Discover the top 5 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 April 2, 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%
DeltaCheapest$756Average$859FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$756Average$848FlexibilityNo cancel feeOn-time75%

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