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Washington, D.C.

$297+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — WAS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/126:00 am
OPO
-
IAD
1 stop13h 35m
Lufthansa
Wed 2/2510:00 pm
IAD
-
OPO
1 stop12h 25m
Lufthansa
Deal found 1/27$440
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/146:00 am
OPO
-
IAD
1 stop13h 35m
Lufthansa
Wed 2/185:40 pm
IAD
-
OPO
1 stop14h 35m
Lufthansa
Deal found 1/29$443
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
Fri 2/276:00 am
OPO
-
IAD
1 stop13h 35m
Lufthansa
Sun 3/157:00 pm
IAD
-
OPO
1 stop12h 40m
Lufthansa
Deal found 1/28$444
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/146:00 am
OPO
-
IAD
1 stop19h 15m
Lufthansa
Sat 2/285:15 pm
IAD
-
OPO
1 stop13h 25m
Lufthansa
Deal found 1/29$445
This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/215:05 am
OPO
-
IAD
1 stop15h 00m
TAP AIR PORTUGAL
Wed 4/2910:35 pm
IAD
-
OPO
1 stop16h 50m
TAP AIR PORTUGAL
Deal found 1/28$446
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
Fri 3/66:00 am
OPO
-
IAD
1 stop14h 50m
Lufthansa
Tue 5/265:55 pm
IAD
-
OPO
1 stop16h 45m
Lufthansa
Deal found 1/28$448
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/126:00 am
OPO
-
IAD
1 stop14h 50m
Multiple Airlines
Mon 2/165:45 pm
IAD
-
OPO
1 stop12h 30m
Multiple Airlines
Deal found 1/27$449
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Sun 3/15:00 am
LIS
-
IAD
1 stop15h 50m
Lufthansa
Sun 3/87:00 pm
IAD
-
LIS
1 stop12h 35m
Lufthansa
Deal found 1/27$452
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/55:00 am
LIS
-
IAD
1 stop15h 50m
Lufthansa
Wed 3/117:00 pm
IAD
-
LIS
1 stop15h 50m
Lufthansa
Deal found 1/29$453
This Rumbo deal was found by Cheapflights users on 1/28. 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.
Fri 2/135:15 pm
LIS
-
IAD
Nonstop8h 45m
TAP AIR PORTUGAL
Sun 2/2210:30 pm
IAD
-
LIS
Nonstop7h 05m
TAP AIR PORTUGAL
Deal found 1/28$454
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Thu 2/126:00 am
OPO
-
IAD
1 stop14h 50m
United Airlines
Wed 2/255:34 pm
IAD
-
OPO
1 stop10h 56m
United Airlines
Deal found 1/27$458
This Expedia deal was found by Cheapflights users on 1/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:00 am
OPO
-
IAD
1 stop14h 50m
Multiple Airlines
Wed 3/45:45 pm
IAD
-
OPO
1 stop12h 30m
Multiple Airlines
Deal found 1/28$459

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$440
(Kiwi.com)

One-way from

$297
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$688

Good round-trip deal

$679 or less

Good one-way deal

$634 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 ($90 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 January 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 January 29, 2026.
Use the filters below to find and compare flights from Portugal to Washington, D.C. that are best for you.

Fly from

Portugal

Fly to

Washington, D.C.

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 2/12

6:00 am-2:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Wed 2/25

6:00 pm-11:40 am

1 stop12h 40m

$440

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 2/14

6:00 am-2:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Wed 2/18

5:40 pm-1:15 pm

1 stop14h 35m

$443

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 4/21

9:00 am-3:05 pm

1 stop11h 05m

Washington, D.C. Dulles Intl

Wed 4/29

10:35 pm-7:00 pm

1 stop15h 25m

$445

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 2/14

6:00 am-8:15 pm

1 stop19h 15m

Washington, D.C. Dulles Intl

Sat 2/28

5:15 pm-11:40 am

1 stop13h 25m

$445

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 3/6

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Tue 5/26

5:55 pm-3:40 pm

1 stop16h 45m

$448

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 3/5

5:00 am-3:50 pm

1 stop15h 50m

Washington, D.C. Dulles Intl

Wed 3/11

7:00 pm-2:50 pm

1 stop15h 50m

$453

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 2/14

6:00 am-8:15 pm

1 stop19h 15m

Washington, D.C. Dulles Intl

Sat 2/28

8:36 am-9:30 am

1 stop19h 54m

$460

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 2/12

6:00 am-2:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Mon 2/16

5:27 pm-12:50 pm

2 stops14h 23m

$462

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 4/16

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sun 4/19

5:55 pm-11:10 am

1 stop12h 15m

$463

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 2/16

5:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Sun 3/1

6:50 pm-10:30 am

1 stop10h 40m

$464

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 60 results
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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, December is the cheapest month in which you can book a flight from Portugal to Washington, D.C. (average of $485). Flying from Portugal to Washington, D.C. in July is currently the most expensive (average of $660). 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 January 29, 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.

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 135 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?

Tuesday 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 27% 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 January 29, 2026.
Peruse reviews from past customers who have flown with KLM, United Airlines, and TAP 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
7.7
Good
1,443 reviews

Boarding

7.8

Comfort

7.6

Crew

8.4

Overall

7.7

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,443 reviews
KLM
7.7
Good
1,443 reviews

Boarding

7.8

Comfort

7.6

Crew

8.4

Overall

7.7

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,214 reviews
KLM
7.7
Good
1,443 reviews

Boarding

7.8

Comfort

7.6

Crew

8.4

Overall

7.7

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
TAP AIR PORTUGAL
7.1
Good
2,130 reviews
KLM
7.7
Good
1,443 reviews

Boarding

7.8

Comfort

7.6

Crew

8.4

Overall

7.7

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 11h 05m. Lufthansa provides one of the quickest options available for as low as $445. 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 TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at $365. Aer Lingus flights start at $374 while deals on JetBlue start at $395 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 Air Canada (69%), United Airlines (69%) or Lufthansa (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 $1,349, our data indicates the cheapest price to be $499. The most popular route (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), is priced around $452.

  • 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, December is the cheapest month in which you can book a flight from Portugal to Washington, D.C. (average of $485). Flying from Portugal to Washington, D.C. in July is currently the most expensive (average of $660). 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
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Manassas
Largo
Bowie
McLean
Clinton
Upper Marlboro

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portugal to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
Charles de Gaulle to Dulles Intl flights
Heathrow to Dulles Intl flights
Frankfurt to Dulles Intl flights
Bruxelles-National to Dulles Intl flights
Amsterdam to Dulles Intl flights
Leonardo da Vinci/Fiumicino to Dulles Intl flights
Istanbul to Dulles Intl flights
Madrid to Dulles Intl flights
Heathrow to Reagan-National flights
Gatwick to Dulles Intl flights
Bruxelles-National to Reagan-National flights
Frederic Chopin to Dulles Intl flights
Dublin to Dulles Intl flights
Zurich to Dulles Intl flights
Charles de Gaulle to Reagan-National flights
London City to Dulles Intl flights
Barcelona-El Prat to Dulles Intl flights
Orly to Dulles Intl flights
Stansted to Dulles Intl flights
Amsterdam to Reagan-National flights
Munich to Dulles Intl flights
Madrid to Reagan-National flights
Istanbul to Reagan-National flights
Lisbon to Dulles Intl flights
Vienna to Dulles Intl flights
Gatwick to Reagan-National flights
Leonardo da Vinci/Fiumicino to Reagan-National flights
Charleroi Brussels to Dulles Intl flights
Duesseldorf Intl to Dulles Intl flights
Berlin to Dulles Intl flights
Luton to Dulles Intl flights
Dublin to Reagan-National flights
Frankfurt to Reagan-National flights
Lisbon to Reagan-National flights
Berlin to Reagan-National flights
Geneva to Dulles Intl flights
Athens to Dulles Intl flights
Malpensa to Dulles Intl flights
Duesseldorf Intl to Reagan-National flights
Oslo Gardermoen to Dulles Intl flights
Zurich to Reagan-National flights
Sabiha Gokcen to Dulles Intl flights
Edinburgh to Dulles Intl flights
Vicenza to Dulles Intl flights
Athens to Reagan-National flights
Frederic Chopin to Reagan-National flights
Vienna to Reagan-National flights

Top 3 airlines flying from Portugal to Washington, D.C.

Discover the top 3 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$492Average$735FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$497Average$726FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$500Average$644FlexibilityNo cancel feeOn-time70%

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