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Washington, D.C.

$344+ Cheap flights from Portugal to Washington, D.C. (WAS)

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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — WAS
Jul 22 — Jul 291
Wed 7/22
Wed 7/29
1 adult, Economy
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Cheap flight deals from Portugal to Washington, D.C.

Cheapest flights from Portugal to Washington, D.C.
Explore the most affordable flight options available from Portugal to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 22, 2026.

This Gotogate deal was found by Cheapflights users on 6/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/242:00 pm
LIS
-
IAD
1 stop33h 30m
Icelandair
Mon 11/307:40 pm
IAD
-
LIS
1 stop12h 10m
Icelandair
Deal found 6/19$599
This American Airlines deal was found by Cheapflights users on 6/19. 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 11/196:30 am
LIS
-
IAD
1 stop14h 50m
American Airlines
Mon 11/239:45 pm
IAD
-
LIS
1 stop19h 10m
American Airlines
Deal found 6/19$610
This American Airlines deal was found by Cheapflights users on 6/20. 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 11/58:20 am
LIS
-
DCA
2 stops17h 38m
American Airlines
Sun 11/82:45 pm
DCA
-
LIS
2 stops22h 00m
American Airlines
Deal found 6/20$616
This Iberia deal was found by Cheapflights users on 6/18. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:35 am
LIS
-
IAD
1 stop13h 55m
Multiple Airlines
Sat 10/105:45 pm
IAD
-
LIS
1 stop19h 20m
Multiple Airlines
Deal found 6/18$617
This Iberia deal was found by Cheapflights users on 6/17. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:35 am
LIS
-
IAD
1 stop17h 20m
Multiple Airlines
Thu 9/2410:25 pm
IAD
-
LIS
1 stop19h 40m
Multiple Airlines
Deal found 6/17$619
This American Airlines deal was found by Cheapflights users on 6/17. 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 12/38:20 am
LIS
-
DCA
2 stops18h 55m
American Airlines
Sun 12/66:30 pm
DCA
-
LIS
2 stops15h 20m
American Airlines
Deal found 6/17$621
This Iberia deal was found by Cheapflights users on 6/18. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:20 am
OPO
-
IAD
1 stop13h 00m
Multiple Airlines
Wed 12/305:50 pm
IAD
-
OPO
1 stop17h 10m
Multiple Airlines
Deal found 6/18$622
This Icelandair deal was found by Cheapflights users on 6/21. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3010:20 pm
LIS
-
BWI
1 stop26h 05m
Icelandair
Wed 12/97:40 pm
BWI
-
LIS
1 stop12h 10m
Icelandair
Deal found 6/21$622
This American Airlines deal was found by Cheapflights users on 6/21. 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 12/38:20 am
OPO
-
BWI
2 stops37h 26m
American Airlines
Sat 12/55:47 pm
BWI
-
OPO
2 stops36h 58m
American Airlines
Deal found 6/21$625
This American Airlines deal was found by Cheapflights users on 6/19. 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.
Tue 11/246:30 am
LIS
-
IAD
2 stops17h 51m
American Airlines
Mon 11/309:45 pm
IAD
-
LIS
1 stop12h 10m
American Airlines
Deal found 6/19$626
This American Airlines deal was found by Cheapflights users on 6/21. 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 9/911:05 am
LIS
-
BWI
2 stops38h 14m
American Airlines
Sun 9/139:35 pm
BWI
-
LIS
1 stop13h 50m
American Airlines
Deal found 6/21$628
This British Airways deal was found by Cheapflights users on 6/20. 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 9/1011:05 am
LIS
-
DCA
1 stop10h 48m
British Airways
Sun 9/274:59 pm
DCA
-
LIS
2 stops19h 46m
British Airways
Deal found 6/20$630

Find flight deals from Portugal to Washington, D.C.

Keep the following information in mind while searching for Portugal to Washington, D.C. flight deals. Data was last updated June 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$599
(Gotogate)

One-way from

$344
(Iberia)

Popular in

July

Cheapest in

January

Average price

$806

Good round-trip deal

$830 or less

Good one-way deal

$656 or less
Provider with most accurate pricing for Lisbon Humberto Delgado-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Washington, D.C. (WAS) flights.
Search Deals
From Portugal to Washington, D.C. (WAS)
Search Deals
One-way flight from Portugal to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($91 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Portugal to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from Portugal to Washington, D.C. (WAS).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portugal to Washington, D.C. 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 22, 2026.
Use the filters below to find and compare flights from Portugal to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 11/19

6:30 am-7:21 pm

2 stops17h 51m

Washington, D.C. Dulles Intl

Mon 11/23

6:20 pm-6:55 pm

1 stop19h 35m

$616

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 11/19

8:20 am-4:20 pm

1 stop13h 00m

Washington, D.C. Dulles Intl

Wed 12/30

5:50 pm-4:00 pm

1 stop17h 10m

$622

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 12/3

8:20 am-4:46 pm

2 stops37h 26m

Baltimore/Washington

Sat 12/5

5:47 pm-11:45 am

2 stops36h 58m

$625

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Thu 9/10

11:05 am-4:53 pm

1 stop10h 48m

Washington, D.C. Reagan-National

Thu 10/1

10:16 pm-11:05 pm

2 stops19h 49m

$630

LisbonBaltimore

LIS - BWI

LISBWI

Lisbon Humberto Delgado

Wed 9/9

7:20 am-5:15 pm

1 stop14h 55m

Baltimore/Washington

Sun 9/13

9:35 pm-5:45 pm

1 stop15h 10m

$637

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Wed 9/9

5:00 am-4:32 pm

2 stops16h 32m

Washington, D.C. Reagan-National

Wed 9/30

11:10 am-8:50 am

2 stops16h 40m

$638

LisbonBaltimore

LIS - BWI

LISBWI

Lisbon Humberto Delgado

Sun 9/6

9:50 am-11:13 pm

2 stops18h 23m

Baltimore/Washington

Wed 9/23

1:55 pm-8:50 am

2 stops13h 55m

$654

LisbonBaltimore

LIS - BWI

LISBWI

Lisbon Humberto Delgado

Sun 8/30

10:20 pm-7:25 pm

1 stop26h 05m

Baltimore/Washington

Sat 12/12

7:40 pm-12:50 pm

1 stop12h 10m

$671

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sun 8/30

10:20 pm-7:20 pm

1 stop26h 00m

Washington, D.C. Dulles Intl

Wed 12/16

7:40 pm-12:50 pm

1 stop12h 10m

$679

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 8/28

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Tue 12/15

8:15 am-9:30 am

1 stop20h 15m

$688

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/19

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Portugal to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. 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, D.C.

What is the cheapest month to book a flight from Portugal to Washington, D.C.?

Currently, September is the cheapest month in which you can book a flight from Portugal to Washington, D.C. (average of $322). Flying from Portugal to Washington, D.C. in July is currently the most expensive (average of $630). 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 WAS?

Find hourly flight availability from Portugal to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 22, 2026.

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

Weekly flight availability from Portugal to Washington, D.C.

Explore weekly flight availability from Portugal to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 22, 2026.

The most flights from PT0 to WAS are scheduled on a Monday (8 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (7 on average).

How often are flights from Portugal to Washington, D.C. delayed?

About 29% of weekly flights between Portugal and Washington, D.C. have experienced delays in the past year, with the average delay time being 132 minutes.

What is the most punctual flight time for Portugal to Washington, D.C. flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Portugal to Washington, D.C. flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 26% of flights being delayed.

How far ahead should I book a flight from Portugal to Washington, D.C.?

To ensure you get the cheapest price possible for a flight from Portugal to Washington, D.C., you should look to book at least 67 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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, D.C.. Reviews last updated June 22, 2026.
Peruse reviews from past customers who have flown with KLM,United Airlines, andTAP AIR PORTUGAL from Portugal to Washington, D.C. to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,530 reviews

Overall

7.8

Crew

8.4

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,530 reviews
KLM
7.8
Good
1,530 reviews

Overall

7.8

Crew

8.4

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
9,874 reviews
KLM
7.8
Good
1,530 reviews

Overall

7.8

Crew

8.4

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
TAP AIR PORTUGAL
7.2
Good
2,291 reviews
KLM
7.8
Good
1,530 reviews

Overall

7.8

Crew

8.4

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Lufthansa
6.8
Okay
8,086 reviews
KLM
7.8
Good
1,530 reviews

Overall

7.8

Crew

8.4

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Related info for your journey

Find useful and relevant information for your journey from Portugal to Washington, D.C.. 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 Portugal to Washington, D.C.?

    A quick flight from Portugal to Washington, D.C. can take about 10h 48m. American Airlines provides one of the quickest options available for as low as $630. The distance between Portugal and Washington, D.C. is about 3562 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Portugal to Washington, D.C. one-way?

    To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $353. American Airlines flights start at $360 while deals on TAP AIR PORTUGAL start at $365 one-way.

  • What are the most popular routes from Portugal to Washington, D.C.?

    The most popular flight routes from Portugal to Washington, D.C. are Lisbon Humberto Delgado - Washington, D.C. Dulles Intl, Lisbon Humberto Delgado - Baltimore/Washington and Lisbon Humberto Delgado - Washington, D.C. Reagan-National.

  • What are the most reliable airlines from Portugal to Washington, D.C.?

    No one likes to see their flight delayed. When booking a flight from Portugal to Washington, D.C. consider choosing JetBlue (72%), TAP AIR PORTUGAL (72%) or airBaltic (70%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Portugal to Washington, D.C.?

    Looking for the cheapest flight from Portugal to Washington, D.C.? While on average our users pay $1,526, our data indicates the cheapest price to be $571. The most popular route (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), is priced around $599.

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

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

  • How can I find direct flights from Portugal to Washington, D.C.?

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

  • Can I find deals for business class flights from Portugal to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Portugal to Washington, D.C. 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 Washington, D.C.?

    Currently, September is the cheapest month in which you can book a flight from Portugal to Washington, D.C. (average of $322). Flying from Portugal to Washington, D.C. in July is currently the most expensive (average of $630). 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

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Arlington
Tysons
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Laurel
Hanover
Falls Church
Waldorf
Silver Spring
Largo
Clinton
Hunt Valley

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Portugal to Washington, D.C.

Discover the top 2 airlines that operate flights from Portugal to Washington, D.C.. 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 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$497Average$881FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$562Average$973FlexibilityNo cancel feeOn-timeN/A

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