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$355+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SEA
may. 6 — may. 131
mar. 5/6
mar. 5/13
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 mayo 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$712
(FlightHub)

One-way from

$355
(Kiwi.com)

Popular in

November

Cheapest in

December

Average price

$809
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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High demand for flights, 1% potential price rise
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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 May 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 mayo 1, 2025.

This FlightHub deal was found by Cheapflights users on 4/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/56:45 amLIS - SEA
1 stop15h 05mMultiple Airlines
vie. 9/194:20 pmSEA - LIS
1 stop32h 40mMultiple Airlines
Deal found 4/30$712
This British Airways deal was found by Cheapflights users on 5/1. 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.
lun. 5/195:05 pmLIS - SEA
1 stop26h 05mBritish Airways
mar. 6/31:30 pmSEA - LIS
1 stop25h 30mBritish Airways
Deal found 5/1$756
This British Airways deal was found by Cheapflights users on 4/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/38:45 pmLIS - PDX
2 stops27h 59mBritish Airways
vie. 1/25:55 amPDX - LIS
2 stops22h 15mBritish Airways
Deal found 4/30$801
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 6/145:00 amLIS - PDX
1 stop14h 20mDelta
sáb. 6/212:20 pmPDX - LIS
2 stops19h 35mDelta
Deal found 4/30$817
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/195:00 amLIS - SEA
1 stop18h 57mDelta
mar. 6/37:25 amSEA - LIS
2 stops17h 25mDelta
Deal found 4/30$817
This KLM deal was found by Cheapflights users on 4/30. 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.
mié. 5/75:00 amLIS - PDX
1 stop14h 20mKLM
vie. 5/161:15 pmPDX - LIS
1 stop13h 40mKLM
Deal found 4/30$821
This KLM deal was found by Cheapflights users on 4/30. 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.
dom. 6/16:20 pmOPO - SEA
1 stop25h 20mKLM
dom. 6/155:35 pmSEA - OPO
1 stop14h 00mKLM
Deal found 4/30$837
This Finnair deal was found by Cheapflights users on 4/30. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/311:15 amLIS - PDX
2 stops19h 33mMultiple Airlines
sáb. 1/38:01 amPDX - LIS
2 stops23h 24mMultiple Airlines
Deal found 4/30$855
This United Airlines deal was found by Cheapflights users on 4/30. 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.
jue. 10/306:00 amOPO - SEA
2 stops22h 12mUnited Airlines
sáb. 12/1311:59 pmSEA - OPO
2 stops31h 16mUnited Airlines
Deal found 4/30$863
This United Airlines deal was found by Cheapflights users on 4/30. 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. 5/195:05 amLIS - SEA
1 stop15h 20mUnited Airlines
mar. 6/35:14 pmSEA - LIS
2 stops31h 06mUnited Airlines
Deal found 4/30$865
This SWISS deal was found by Cheapflights users on 5/1. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/195:55 amLIS - SEA
2 stops23h 36mSWISS
mar. 6/31:45 pmSEA - LIS
2 stops17h 00mSWISS
Deal found 5/1$870
This Booking.com deal was found by Cheapflights users on 4/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 6/16:15 amOPO - SEA
1 stop18h 44mMultiple Airlines
dom. 6/152:55 pmSEA - OPO
2 stops34h 40mMultiple Airlines
Deal found 4/30$894

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 mayo 1, 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

vie. 9/5

6:45 am-1:50 pm

1 stop15h 05m

Seattle/Tacoma Intl

vie. 9/19

4:20 pm-9:00 am

1 stop32h 40m

$712

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

lun. 5/19

5:05 pm-11:10 am

1 stop26h 05m

Seattle/Tacoma Intl

mar. 6/3

1:30 pm-11:00 pm

1 stop25h 30m

$756

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

sáb. 6/14

11:05 am-9:55 pm

1 stop18h 50m

Portland

sáb. 6/21

7:25 pm-11:10 pm

1 stop19h 45m

$814

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

sáb. 6/14

5:00 am-11:20 am

1 stop14h 20m

Portland

sáb. 6/21

2:20 pm-5:55 pm

2 stops19h 35m

$817

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

lun. 5/19

5:00 am-3:57 pm

1 stop18h 57m

Seattle/Tacoma Intl

mar. 6/3

7:25 am-8:50 am

2 stops17h 25m

$817

PortoSeattle

OPO - SEA

OPOSEA

Porto

dom. 6/1

6:20 pm-11:40 am

1 stop25h 20m

Seattle/Tacoma Intl

dom. 6/15

5:35 pm-3:35 pm

1 stop14h 00m

$837

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

lun. 5/19

5:05 am-12:25 pm

1 stop15h 20m

Seattle/Tacoma Intl

mar. 6/3

5:14 pm-8:20 am

2 stops31h 06m

$865

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

lun. 5/19

5:55 am-9:31 pm

2 stops23h 36m

Seattle/Tacoma Intl

mar. 6/3

1:45 pm-2:45 pm

2 stops17h 00m

$870

PortoSeattle

OPO - SEA

OPOSEA

Porto

sáb. 8/30

6:00 am-11:55 am

1 stop13h 55m

Seattle/Tacoma Intl

sáb. 12/13

7:00 am-3:15 pm

2 stops24h 15m

$875

PortoSeattle

OPO - SEA

OPOSEA

Porto

dom. 6/1

6:15 am-4:59 pm

1 stop18h 44m

Seattle/Tacoma Intl

dom. 6/15

2:55 pm-9:35 am

2 stops34h 40m

$894

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 44 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 $405). 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 mayo 1, 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 mayo 1, 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
7,934 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
1,275 reviews
Delta
8.0
Very good
7,934 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
1,588 reviews
Delta
8.0
Very good
7,934 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

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 Aer Lingus, with whom users have recently found tickets for as low as $570. However, be on the lookout for offers from Turkish Airlines 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 $405). 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 mayo 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$717Average$823FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$720Average$1,084FlexibilityNo 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$765Average$859FlexibilityNo cancel feeOn-timeN/A

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