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Washington, D.C.

$356+ 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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — WAS
Apr 13 — Apr 201
Mon 4/13
Mon 4/20
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 March 14, 2026.

This Rumbo deal was found by Cheapflights users on 3/14. 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 4/99:00 am
OPO
-
IAD
1 stop11h 10m
TAP AIR PORTUGAL
Fri 4/245:05 pm
IAD
-
OPO
1 stop9h 55m
TAP AIR PORTUGAL
Deal found 3/14$543
This Rumbo deal was found by Cheapflights users on 3/13. 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 4/99:00 am
OPO
-
IAD
1 stop11h 10m
TAP AIR PORTUGAL
Sat 4/2510:35 pm
IAD
-
OPO
1 stop15h 25m
TAP AIR PORTUGAL
Deal found 3/13$545
This Mytrip deal was found by Cheapflights users on 3/9. 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 4/165:05 am
OPO
-
IAD
1 stop15h 05m
TAP AIR PORTUGAL
Thu 4/3010:35 pm
IAD
-
OPO
1 stop15h 20m
TAP AIR PORTUGAL
Deal found 3/9$553
This KLM deal was found by Cheapflights users on 3/10. 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 4/165:00 am
OPO
-
IAD
1 stop15h 35m
KLM
Thu 4/309:45 pm
IAD
-
OPO
1 stop19h 15m
KLM
Deal found 3/10$557
This KLM deal was found by Cheapflights users on 3/10. 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.
Tue 4/2111:30 am
OPO
-
IAD
1 stop33h 05m
KLM
Wed 4/296:15 pm
IAD
-
OPO
1 stop22h 45m
KLM
Deal found 3/10$561
This Delta deal was found by Cheapflights users on 3/10. 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 4/165:00 am
OPO
-
IAD
2 stops16h 15m
Delta
Thu 4/309:45 pm
IAD
-
OPO
1 stop19h 15m
Delta
Deal found 3/10$566
This KLM deal was found by Cheapflights users on 3/9. 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.
Mon 3/163:30 pm
LIS
-
IAD
1 stop29h 35m
Multiple Airlines
Mon 3/237:50 pm
IAD
-
LIS
1 stop17h 40m
Multiple Airlines
Deal found 3/9$568
This Delta deal was found by Cheapflights users on 3/9. 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.
Mon 3/165:30 am
LIS
-
IAD
1 stop19h 15m
Delta
Mon 3/2310:40 pm
IAD
-
LIS
1 stop14h 50m
Delta
Deal found 3/9$571
This KLM deal was found by Cheapflights users on 3/10. 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 3/265:00 am
LIS
-
IAD
1 stop16h 05m
KLM
Sat 4/45:40 pm
IAD
-
LIS
1 stop12h 15m
KLM
Deal found 3/10$573
This Air France deal was found by Cheapflights users on 3/10. 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.
Sun 9/136:50 pm
LIS
-
IAD
1 stop26h 15m
Air France
Sat 10/36:15 pm
IAD
-
LIS
1 stop12h 00m
Air France
Deal found 3/10$582
This Mytrip deal was found by Cheapflights users on 3/9. 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.
Mon 4/135:55 am
LIS
-
IAD
1 stop15h 50m
SWISS
Sun 4/198:20 pm
IAD
-
LIS
1 stop22h 05m
SWISS
Deal found 3/9$589
This Lufthansa deal was found by Cheapflights users on 3/11. 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 4/26:00 am
OPO
-
IAD
1 stop14h 05m
Multiple Airlines
Wed 4/158:20 pm
IAD
-
OPO
1 stop17h 10m
Multiple Airlines
Deal found 3/11$590

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 March 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$545
(Rumbo)

One-way from

$356
(Orbitz)

Popular in

July

Cheapest in

September

Average price

$686

Good round-trip deal

$678 or less

Good one-way deal

$603 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. 12% potential increase in price ($95 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 14, 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

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 4/21

11:30 am-3:35 pm

1 stop33h 05m

Washington, D.C. Dulles Intl

Wed 4/29

6:15 pm-10:00 pm

1 stop22h 45m

$561

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 3/26

5:00 am-5:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Sat 4/4

5:40 pm-10:55 am

1 stop12h 15m

$573

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 5/14

6:00 am-3:05 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

Wed 5/27

5:55 pm-3:40 pm

1 stop16h 45m

$601

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 5/20

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sun 6/14

10:11 pm-7:00 am

1 stop27h 49m

$623

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 5/14

6:00 am-9:02 pm

2 stops20h 02m

Baltimore/Washington

Wed 5/27

8:15 am-9:45 am

2 stops20h 30m

$625

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 5/14

6:00 am-9:02 pm

2 stops20h 02m

Baltimore/Washington

Tue 5/26

6:10 am-9:45 am

2 stops22h 35m

$625

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Wed 5/13

6:00 am-9:02 pm

2 stops20h 02m

Baltimore/Washington

Tue 5/26

6:10 am-9:45 am

2 stops22h 35m

$625
Quickest round-trip

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 3/26

5:00 am-9:15 pm

1 stop20h 15m

Washington, D.C. Dulles Intl

Sat 4/4

10:35 pm-10:35 am

Nonstop7h 00m

$626

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 4/16

6:00 am-10:43 pm

2 stops21h 43m

Washington, D.C. Reagan-National

Mon 4/20

4:30 pm-9:45 am

1 stop12h 15m

$628

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 4/16

5:05 am-3:05 pm

1 stop15h 00m

Washington, D.C. Dulles Intl

Mon 4/20

10:20 pm-10:45 pm

1 stop19h 25m

$630

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

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, March is the cheapest month in which you can book a flight from Portugal to Washington, D.C. (average of $451). 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 March 14, 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 March 14, 2026.

The most flights from PT0 to WAS are scheduled on a Monday (5 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

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

About 33% of weekly flights between Portugal and Washington, D.C. have experienced delays in the past year, with the average delay time being 134 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 March 14, 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
1,471 reviews

Boarding

7.8

Crew

8.4

Overall

7.8

Food

7.3

Comfort

7.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.8
Good
1,471 reviews
KLM
7.8
Good
1,471 reviews

Boarding

7.8

Crew

8.4

Overall

7.8

Food

7.3

Comfort

7.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
United Airlines
7.4
Good
9,427 reviews
KLM
7.8
Good
1,471 reviews

Boarding

7.8

Crew

8.4

Overall

7.8

Food

7.3

Comfort

7.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
TAP AIR PORTUGAL
7.1
Good
2,166 reviews
KLM
7.8
Good
1,471 reviews

Boarding

7.8

Crew

8.4

Overall

7.8

Food

7.3

Comfort

7.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 14h 05m. KLM provides one of the quickest options available for as low as $601. 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 $371 while deals on British Airways start at $378 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 Porto - 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 $1,182, our data indicates the cheapest price to be $552. The most popular route (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), is priced around $618.

  • 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, March is the cheapest month in which you can book a flight from Portugal to Washington, D.C. (average of $451). 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
Hyattsville
Hanover
Laurel
Rockville
Upper Marlboro
Linthicum Heights
Fredericksburg
Largo
Bowie
Clinton
Towson
College Park

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 March 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$492Average$755FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$497Average$789FlexibilityNo cancel feeOn-time69%

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