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$261+ Cheap flights from Washington, D.C. (WAS) to Portugal

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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LIS
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Portugal

Cheapest flights from Washington, D.C. to Portugal
Explore the most affordable flight options available from Washington, D.C. to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This oojo deal was found by Cheapflights users on 12/12. 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.
Wed 12/3110:30 pmIAD - OPO
1 stop13h 30mTAP AIR PORTUGAL
Sun 1/1112:00 pmOPO - IAD
1 stop32h 15mTAP AIR PORTUGAL
Deal found 12/12$506
This KAYAK deal was found by Cheapflights users on 12/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:25 pmIAD - OPO
1 stop20h 10mSWISS
Sun 1/114:10 pmOPO - IAD
2 stops53h 30mSWISS
Deal found 12/12$698
This Delta deal was found by Cheapflights users on 12/12. 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.
Wed 12/3112:32 pmDCA - OPO
2 stops16h 58mDelta
Sun 1/115:00 amOPO - DCA
2 stops22h 48mDelta
Deal found 12/12$772
This FlightHub deal was found by Cheapflights users on 12/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:54 pmDCA - LIS
2 stops42h 26mMultiple Airlines
Thu 1/89:20 pmLIS - DCA
2 stops29h 25mMultiple Airlines
Deal found 12/14$774
This FlightHub deal was found by Cheapflights users on 12/12. 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.
Wed 12/316:15 amDCA - LIS
2 stops33h 05mMultiple Airlines
Sun 1/119:20 pmLIS - DCA
2 stops29h 25mMultiple Airlines
Deal found 12/12$787
This CrystalTravel deal was found by Cheapflights users on 12/14. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/158:30 pmIAD - OPO
1 stop16h 55mSWISS
Mon 12/227:20 pmOPO - IAD
1 stop25h 10mSWISS
Deal found 12/14$830
This FlightHub deal was found by Cheapflights users on 12/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:00 pmIAD - OPO
1 stop12h 40mMultiple Airlines
Mon 2/212:05 pmOPO - IAD
1 stop33h 35mMultiple Airlines
Deal found 12/13$839
This Mytrip deal was found by Cheapflights users on 12/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/156:00 pmIAD - LIS
2 stops14h 30mMultiple Airlines
Mon 12/227:10 pmLIS - IAD
2 stops26h 30mMultiple Airlines
Deal found 12/14$839
This oojo deal was found by Cheapflights users on 12/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:30 pmIAD - LIS
Nonstop7h 05mTAP AIR PORTUGAL
Sat 1/109:00 pmLIS - IAD
2 stops39h 20mTAP AIR PORTUGAL
Deal found 12/13$843
This Turkish Airlines deal was found by Cheapflights users on 12/14. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/261:30 pmIAD - LIS
1 stop20h 35mTurkish Airlines
Tue 1/64:05 pmLIS - IAD
1 stop32h 15mTurkish Airlines
Deal found 12/14$856
This FlightHub deal was found by Cheapflights users on 12/12. 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.
Wed 12/318:30 pmIAD - LIS
1 stop20h 05mScandinavian Airlines
Sun 1/114:55 pmLIS - IAD
2 stops31h 14mScandinavian Airlines
Deal found 12/12$865
This FlightHub deal was found by Cheapflights users on 12/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:00 pmIAD - OPO
1 stop12h 40mLufthansa
Mon 2/21:45 pmOPO - IAD
2 stops29h 50mLufthansa
Deal found 12/13$876

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

Keep the following information in mind while searching for Washington, D.C. to Portugal flight deals. Data was last updated December 15, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$436
(Kiwi.com)

One-way from

$261
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,391

Good round-trip deal

$547 or less

Good one-way deal

$323 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Lisbon Humberto Delgado flights.
Search Deals
From Washington, D.C. (WAS) to Portugal
Search Deals
One-way flight from Washington, D.C. (WAS) to Portugal
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Washington, D.C. (WAS) to Portugal.
Search Deals
Price to beat on a one-way flight from Washington, D.C. (WAS) to Portugal.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Portugal 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 December 15, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Portugal that are best for you.

Fly from

Washington, D.C.

Fly to

Portugal

Route

Depart

Return

Price

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 2/17

6:50 pm-10:30 am

1 stop10h 40m

Porto

Fri 2/27

5:00 am-4:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 2/18

6:50 pm-10:30 am

1 stop10h 40m

Porto

Fri 2/27

5:00 am-4:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 3/10

7:50 pm-10:30 am

1 stop10h 40m

Porto

Tue 3/17

11:15 am-5:05 pm

1 stop33h 50m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 2/15

6:50 pm-10:30 am

1 stop10h 40m

Porto

Tue 2/24

5:00 am-4:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 2/16

6:50 pm-10:30 am

1 stop10h 40m

Porto

Fri 2/27

5:00 am-4:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 3/10

7:50 pm-10:30 am

1 stop10h 40m

Porto

Mon 3/16

11:15 am-5:05 pm

1 stop33h 50m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 2/16

6:50 pm-10:30 am

1 stop10h 40m

Porto

Thu 2/26

5:00 am-4:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 2/16

6:50 pm-10:30 am

1 stop10h 40m

Porto

Tue 2/24

11:15 am-4:05 pm

1 stop33h 50m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 2/15

5:45 pm-11:10 am

1 stop12h 25m

Porto

Tue 2/24

12:05 pm-3:05 pm

1 stop32h 00m

$482

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 3/10

8:10 pm-9:30 am

1 stop9h 20m

Porto

Tue 3/17

6:00 am-9:35 pm

2 stops19h 35m

$486

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

Showing 1-10 of 60 results
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Best time to book a flight from Washington, D.C. to Portugal

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

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

Currently, July is the cheapest month in which you can book a flight from Washington, D.C. to Portugal (average of $345). Flying from Washington, D.C. to Portugal in September is currently the most expensive (average of $529). 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 WAS to PT?

Find hourly flight availability from Washington, D.C. to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

It’s typically best to fly out from Washington, D.C. to Portugal in the morning. Doing so could potentially save you 19% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from Washington, D.C. to Portugal?

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Portugal. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. to Portugal flight should consider departing on Sunday afternoons when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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

Explore weekly flight availability from Washington, D.C. to Portugal. 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 December 15, 2025.

The most flights from WAS to PT0 are scheduled on a Monday (5 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

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

About 28% of weekly flights between Washington, D.C. and Portugal have experienced delays in the past year, with the average delay time being 140 minutes.

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

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning 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 Friday has historically faced a higher average of delays compared to other days of the week.

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

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

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated December 15, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and TAP AIR PORTUGAL from Washington, D.C. to Portugal. 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
7.9
Good
8,010 reviews

Food

7.3

Comfort

7.9

Boarding

8.1

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,010 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Comfort

7.9

Boarding

8.1

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,095 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Comfort

7.9

Boarding

8.1

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
TAP AIR PORTUGAL
7.2
Good
2,090 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Comfort

7.9

Boarding

8.1

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Lufthansa
6.8
Okay
7,631 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Comfort

7.9

Boarding

8.1

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Royal Air Maroc
6.2
Okay
538 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Comfort

7.9

Boarding

8.1

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

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

    Delta, United Airlines, and KLM can get you from Washington, D.C. to Portugal in just under 9h 20m. Your travel time can differ by up to 6h 06m. Washington, D.C. and Portugal are separated by a distance of 3520 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 Washington, D.C. to Portugal one-way?

    One-way options have recently been found by users for as low as $253 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Royal Air Maroc from $353 and Scandinavian Airlines from $358 one-way.

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

    While some choose either Washington, D.C. Reagan-National - Lisbon Humberto Delgado or Baltimore/Washington - Lisbon Humberto Delgado, Washington, D.C. Dulles Intl - Lisbon Humberto Delgado is the most popular route from Washington, D.C. to Portugal.

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

    The top 3 most reliable airlines when flying from Washington, D.C. to Portugal are Air Canada (76%), United Airlines (76%) and Lufthansa (76%).

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

    Looking for the cheapest flight from Washington, D.C. to Portugal? While on average our users pay $1,571, our data indicates the cheapest price to be $267. The most popular route (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), is priced around $520.

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

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

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

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

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

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

    Currently, July is the cheapest month in which you can book a flight from Washington, D.C. to Portugal (average of $345). Flying from Washington, D.C. to Portugal in September is currently the most expensive (average of $529). 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 Washington, D.C. to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Heathrow flights
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Reagan-National to Linate flights
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Top 10 airlines flying from Washington, D.C. to Portugal

Discover the top 10 airlines that operate flights from Washington, D.C. to Portugal. 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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$345Average$399FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$439Average$872FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$444Average$681FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$493Average$1,070FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$504Average$599FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$504Average$920FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$508Average$1,022FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$510Average$874FlexibilityNo cancel feeOn-time70%
IberiaCheapest$515Average$721FlexibilityNo cancel feeOn-time77%
Royal Air MarocCheapest$551Average$669FlexibilityNo cancel feeOn-time75%

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