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$353+ 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LIS
Jun 3 — Jun 101
Wed 6/3
Wed 6/10
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 May 4, 2026.

This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/239:45 pm
IAD
-
OPO
1 stop37h 00m
Turkish Airlines
Thu 10/14:40 pm
OPO
-
IAD
1 stop32h 10m
Turkish Airlines
Deal found 4/29$709
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/151:20 pm
IAD
-
OPO
1 stop29h 10m
Turkish Airlines
Tue 10/1310:40 am
OPO
-
IAD
1 stop38h 10m
Turkish Airlines
Deal found 4/29$713
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3010:30 pm
IAD
-
OPO
1 stop10h 00m
TAP AIR PORTUGAL
Tue 1/128:30 am
OPO
-
IAD
1 stop11h 15m
TAP AIR PORTUGAL
Deal found 4/30$719
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/218:15 am
IAD
-
OPO
2 stops17h 45m
Multiple Airlines
Mon 11/98:40 pm
OPO
-
IAD
2 stops28h 15m
Multiple Airlines
Deal found 5/3$729
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:15 am
IAD
-
OPO
1 stop20h 15m
United Airlines
Fri 11/276:00 am
OPO
-
IAD
1 stop14h 50m
United Airlines
Deal found 5/2$732
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/274:55 pm
IAD
-
OPO
1 stop11h 10m
Delta
Mon 1/1111:15 am
OPO
-
IAD
1 stop33h 30m
Delta
Deal found 4/30$734
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/295:25 pm
IAD
-
OPO
1 stop11h 35m
TAP AIR PORTUGAL
Wed 1/1312:25 pm
OPO
-
IAD
1 stop13h 10m
TAP AIR PORTUGAL
Deal found 4/30$735
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/108:30 pm
IAD
-
FAO
1 stop11h 20m
Multiple Airlines
Wed 5/207:45 pm
FAO
-
IAD
2 stops24h 25m
Multiple Airlines
Deal found 4/29$736
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/301:00 pm
IAD
-
OPO
2 stops15h 05m
Delta
Mon 1/1111:15 am
OPO
-
IAD
1 stop33h 30m
Delta
Deal found 4/30$738
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1510:30 pm
IAD
-
OPO
1 stop10h 00m
TAP AIR PORTUGAL
Sun 11/296:00 pm
OPO
-
IAD
1 stop26h 15m
TAP AIR PORTUGAL
Deal found 5/2$739
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/31:20 pm
IAD
-
OPO
1 stop21h 30m
Turkish Airlines
Thu 9/36:10 am
OPO
-
IAD
1 stop34h 25m
Turkish Airlines
Deal found 4/30$740
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/306:00 am
DCA
-
OPO
2 stops25h 50m
Multiple Airlines
Tue 1/128:40 pm
OPO
-
DCA
2 stops25h 28m
Multiple Airlines
Deal found 4/30$740

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 May 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$709
(FlightHub)

One-way from

$353
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,132

Good round-trip deal

$847 or less

Good one-way deal

$525 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. 20% potential increase in price ($245 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($33 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 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 May 4, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 10/13

6:00 am-7:00 am

1 stop20h 00m

Porto

Thu 10/15

11:40 am-7:46 am

2 stops25h 06m

$788

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sun 8/16

5:00 pm-10:25 am

1 stop12h 25m

Porto

Tue 8/25

5:00 am-6:11 pm

2 stops18h 11m

$804

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sat 8/8

10:29 pm-9:45 am

1 stop30h 16m

Porto

Wed 8/19

6:00 am-3:15 pm

1 stop14h 15m

$804

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 8/3

12:27 pm-10:30 am

2 stops17h 03m

Porto

Thu 9/3

5:00 am-7:18 pm

2 stops19h 18m

$808

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 7/26

6:36 pm-10:25 am

1 stop10h 49m

Porto

Fri 8/21

5:00 am-6:33 pm

2 stops18h 33m

$863

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Mon 8/3

12:03 pm-10:30 am

2 stops17h 27m

Porto

Tue 8/11

5:00 am-4:49 pm

2 stops16h 49m

$895

Washington, D.C.Faro

IAD - FAO

IADFAO

Washington, D.C. Dulles Intl

Mon 8/3

6:10 pm-7:30 pm

1 stop20h 20m

Faro

Thu 8/13

9:05 pm-3:35 pm

1 stop23h 30m

$910

Washington, D.C.Faro

IAD - FAO

IADFAO

Washington, D.C. Dulles Intl

Sun 9/13

5:40 pm-9:10 am

1 stop34h 30m

Faro

Mon 9/21

9:45 pm-3:35 pm

1 stop22h 50m

$910

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 7/21

9:45 am-7:00 am

1 stop16h 15m

Porto

Wed 7/29

6:00 am-3:15 pm

1 stop14h 15m

$911

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 7/20

8:25 am-6:55 am

1 stop17h 30m

Porto

Fri 7/31

6:00 am-4:05 pm

1 stop15h 05m

$912

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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

Booking 42 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. to Portugal. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Portugal (average of $201). Flying from Washington, D.C. to Portugal in June is currently the most expensive (average of $1,248). 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 May 4, 2026.

When flying from Washington, D.C. to Portugal, 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 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 May 4, 2026.

The most flights from WAS to PT0 are scheduled on a Friday (8 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (5 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 146 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?

Saturday 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 May 4, 2026.
Read reviews from past customers who have flown Delta,United Airlines, andTAP 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
8,460 reviews

Entertainment

7.8

Comfort

7.9

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
Delta
7.9
Good
8,460 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Comfort

7.9

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
United Airlines
7.4
Good
9,680 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Comfort

7.9

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
TAP AIR PORTUGAL
7.2
Good
2,230 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Comfort

7.9

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
Lufthansa
6.8
Okay
7,972 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Comfort

7.9

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
Royal Air Maroc
6.2
Okay
598 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Comfort

7.9

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.

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?

    United Airlines, Delta, and KLM can get you from Washington, D.C. to Portugal in just under 12h 25m. Your travel time can differ by up to 7h 55m. 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 $251 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Lufthansa from $300 and Royal Air Maroc from $338 one-way.

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

    While some choose either Baltimore/Washington - Lisbon Humberto Delgado or Washington, D.C. Reagan-National - 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 airBaltic (95%), JetBlue (89%) and TAP AIR PORTUGAL (89%).

  • 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 $1,276, our data indicates the cheapest price to be $387. The most popular route (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), is priced around $677.

  • 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, January is the cheapest month in which you can book a flight from Washington, D.C. to Portugal (average of $201). Flying from Washington, D.C. to Portugal in June is currently the most expensive (average of $1,248). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 May 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$477Average$826FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$480Average$849FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$493Average$949FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$497Average$953FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$504Average$599FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$514Average$1,051FlexibilityNo cancel feeOn-time76%
IberiaCheapest$515Average$653FlexibilityNo cancel feeOn-time77%
DeltaCheapest$529Average$969FlexibilityNo cancel feeOn-timeN/A
Royal Air MarocCheapest$544Average$736FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$591Average$664FlexibilityNo cancel feeOn-time77%

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