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Washington, D.C.

$337+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — WAS
Jun 3 — Jun 101
Wed 6/3
Wed 6/10
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 May 4, 2026.

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.
Thu 9/36:35 am
LIS
-
IAD
1 stop13h 55m
Multiple Airlines
Wed 9/99:30 pm
IAD
-
LIS
1 stop15h 25m
Multiple Airlines
Deal found 4/30$650
This Travelis deal was found by Cheapflights users on 4/29. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:25 am
LIS
-
IAD
1 stop13h 40m
Lufthansa
Sun 5/2410:25 pm
IAD
-
LIS
Nonstop7h 05m
Lufthansa
Deal found 4/29$652
This flugladen.de deal was found by Cheapflights users on 5/3. 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.
Tue 11/105:55 pm
LIS
-
IAD
1 stop29h 50m
Royal Air Maroc
Fri 11/138:45 pm
IAD
-
LIS
1 stop15h 10m
Royal Air Maroc
Deal found 5/3$660
This Lufthansa 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:00 am
OPO
-
IAD
1 stop15h 05m
Lufthansa
Thu 6/43:25 pm
IAD
-
OPO
1 stop14h 50m
Lufthansa
Deal found 4/30$668
This Booking.com deal was found by Cheapflights users on 5/2. 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.
Mon 6/16:00 am
OPO
-
IAD
1 stop15h 05m
Lufthansa
Mon 6/83:25 pm
IAD
-
OPO
1 stop19h 15m
Lufthansa
Deal found 5/2$671
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.
Thu 5/217:20 pm
OPO
-
IAD
1 stop26h 25m
SWISS
Wed 5/278:20 pm
IAD
-
OPO
1 stop30h 35m
SWISS
Deal found 5/1$674
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.
Thu 9/37:20 am
LIS
-
BWI
1 stop17h 20m
British Airways
Wed 9/97:25 pm
BWI
-
LIS
1 stop17h 30m
British Airways
Deal found 5/1$676
This SWISS deal was found by Cheapflights users on 4/29. 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.
Thu 5/147:20 pm
OPO
-
IAD
1 stop24h 55m
SWISS
Fri 5/298:20 pm
IAD
-
OPO
1 stop17h 10m
SWISS
Deal found 4/29$679
This Lufthansa deal was found by Cheapflights users on 5/2. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/176:00 am
OPO
-
IAD
1 stop14h 55m
Lufthansa
Wed 6/243:25 pm
IAD
-
OPO
1 stop14h 55m
Lufthansa
Deal found 5/2$680
This Lufthansa 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:00 am
OPO
-
IAD
1 stop15h 05m
Lufthansa
Sat 9/265:55 pm
IAD
-
OPO
1 stop12h 20m
Lufthansa
Deal found 4/30$682
This Rumbo 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/311:40 am
LIS
-
IAD
Nonstop8h 30m
TAP AIR PORTUGAL
Wed 9/910:35 pm
IAD
-
LIS
Nonstop7h 20m
TAP AIR PORTUGAL
Deal found 4/30$684
This Lufthansa deal was found by Cheapflights users on 5/3. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:00 am
OPO
-
IAD
1 stop15h 05m
Lufthansa
Mon 9/143:25 pm
IAD
-
OPO
1 stop14h 50m
Lufthansa
Deal found 5/3$687

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 May 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$650
(British Airways)

One-way from

$337
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$759

Good round-trip deal

$982 or less

Good one-way deal

$661 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 ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 4, 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

LisbonBaltimore

LIS - BWI

LISBWI

Lisbon Humberto Delgado

Thu 9/3

7:20 am-7:40 pm

1 stop17h 20m

Baltimore/Washington

Wed 9/9

7:25 pm-5:55 pm

1 stop17h 30m

$676

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 6/15

7:20 pm-3:30 pm

1 stop25h 10m

Washington, D.C. Dulles Intl

Mon 6/22

8:20 pm-7:55 am

1 stop30h 35m

$679

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 5/14

7:20 pm-3:15 pm

1 stop24h 55m

Washington, D.C. Dulles Intl

Fri 5/29

8:20 pm-6:30 pm

1 stop17h 10m

$679

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 9/10

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Mon 9/14

3:25 pm-11:15 am

1 stop14h 50m

$687

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sat 9/12

12:20 pm-7:46 am

2 stops24h 26m

Washington, D.C. Reagan-National

Sun 9/13

8:00 pm-7:00 am

2 stops30h 00m

$689

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 6/15

6:00 am-3:55 pm

1 stop14h 55m

Washington, D.C. Dulles Intl

Mon 6/22

6:33 am-7:00 am

2 stops19h 27m

$698

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 6/1

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Mon 6/8

12:35 pm-6:50 am

2 stops13h 15m

$700

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 6/1

6:00 am-9:22 am

2 stops32h 22m

Washington, D.C. Reagan-National

Mon 6/8

8:25 pm-6:15 am

1 stop28h 50m

$703

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Fri 9/11

6:00 am-12:43 am

2 stops23h 43m

Baltimore/Washington

Mon 9/14

6:15 am-7:00 am

2 stops19h 45m

$705

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 5/21

12:10 pm-12:33 am

2 stops17h 23m

Baltimore/Washington

Wed 5/27

6:10 am-6:55 am

2 stops19h 45m

$709

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/2

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.

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 77 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.

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 $576). 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 May 4, 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 May 4, 2026.

The most flights from PT0 to WAS are scheduled on a Tuesday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

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

About 32% of weekly flights between Portugal and Washington, D.C. have experienced delays in the past year, with the average delay time being 130 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 28% of flights being delayed.

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 May 4, 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
1,511 reviews

Overall

7.8

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.2

Comfort

7.7

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
1,511 reviews
KLM
7.8
Good
1,511 reviews

Overall

7.8

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.2

Comfort

7.7

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
9,682 reviews
KLM
7.8
Good
1,511 reviews

Overall

7.8

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.2

Comfort

7.7

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
2,234 reviews
KLM
7.8
Good
1,511 reviews

Overall

7.8

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.2

Comfort

7.7

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 15h 05m. British Airways provides one of the quickest options available for as low as $687. The distance between Portugal and Washington, D.C. is about 3537 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 $358 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 (75%), TAP AIR PORTUGAL (75%) or Air Canada (69%) 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 $1,359, our data indicates the cheapest price to be $396. The most popular route (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), is priced around $650.

  • 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 $576). 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
Tysons
Owings Mills
Springfield
Arlington
Silver Spring
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Woodbridge
Hanover
Laurel
Largo
Upper Marlboro
Waldorf
Clinton
Hunt Valley
Cordova

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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 May 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$497Average$802FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$562Average$705FlexibilityNo cancel feeOn-timeN/A

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