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$282+ 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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LIS
Apr 15 — Apr 221
Wed 4/15
Wed 4/22
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 March 16, 2026.

This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:20 pm
IAD
-
LIS
1 stop14h 30m
Scandinavian Airlines
Wed 4/295:00 pm
LIS
-
IAD
1 stop29h 00m
Scandinavian Airlines
Deal found 3/13$558
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/138:20 pm
IAD
-
LIS
1 stop14h 30m
Scandinavian Airlines
Wed 4/295:00 pm
LIS
-
IAD
1 stop29h 00m
Scandinavian Airlines
Deal found 3/14$563
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/268:20 pm
IAD
-
LIS
1 stop14h 15m
Scandinavian Airlines
Fri 5/19:15 pm
LIS
-
IAD
1 stop24h 45m
Scandinavian Airlines
Deal found 3/13$564
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/268:20 pm
IAD
-
LIS
1 stop14h 15m
Scandinavian Airlines
Sat 5/210:55 pm
LIS
-
IAD
1 stop23h 05m
Scandinavian Airlines
Deal found 3/13$565
This Scandinavian Airlines deal was found by Cheapflights users on 3/12. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/198:20 pm
IAD
-
LIS
1 stop14h 15m
Scandinavian Airlines
Fri 5/19:15 pm
LIS
-
IAD
1 stop24h 45m
Scandinavian Airlines
Deal found 3/12$570
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/198:20 pm
IAD
-
LIS
1 stop14h 15m
Scandinavian Airlines
Sat 5/26:25 pm
LIS
-
IAD
1 stop27h 35m
Scandinavian Airlines
Deal found 3/12$573
This Justfly.com 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/311:20 pm
IAD
-
OPO
1 stop21h 20m
Turkish Airlines
Wed 4/1510:45 am
OPO
-
IAD
1 stop29h 50m
Turkish Airlines
Deal found 3/13$578
This oojo deal was found by Cheapflights users on 3/15. 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.
Fri 10/238:20 pm
IAD
-
LIS
1 stop14h 15m
Scandinavian Airlines
Wed 11/47:00 pm
LIS
-
IAD
1 stop27h 15m
Scandinavian Airlines
Deal found 3/15$578
This Justfly.com 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/222:30 pm
IAD
-
OPO
1 stop20h 40m
Turkish Airlines
Wed 4/84:40 pm
OPO
-
IAD
1 stop23h 55m
Turkish Airlines
Deal found 3/13$579
This FlightHub deal was found by Cheapflights users on 3/16. 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.
Fri 10/238:20 pm
IAD
-
LIS
2 stops40h 05m
Scandinavian Airlines
Sun 11/14:55 pm
LIS
-
IAD
1 stop29h 20m
Scandinavian Airlines
Deal found 3/16$581
This oojo deal was found by Cheapflights users on 3/16. 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 4/268:20 pm
IAD
-
LIS
1 stop14h 15m
Scandinavian Airlines
Tue 5/125:00 pm
LIS
-
IAD
1 stop29h 00m
Scandinavian Airlines
Deal found 3/16$582
This Justfly.com 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/129:45 pm
IAD
-
OPO
1 stop37h 05m
Turkish Airlines
Wed 4/294:40 pm
OPO
-
IAD
1 stop23h 55m
Turkish Airlines
Deal found 3/13$583

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 March 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$558
(oojo)

One-way from

$282
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$880

Good round-trip deal

$775 or less

Good one-way deal

$419 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. 15% potential increase in price ($166 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 March 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 March 16, 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

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 4/19

10:35 pm-11:00 pm

1 stop19h 25m

Porto

Thu 4/23

5:05 am-3:10 pm

1 stop15h 05m

$645

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Thu 3/19

10:15 pm-3:10 pm

1 stop36h 55m

Porto

Mon 3/23

10:55 am-12:45 pm

1 stop29h 50m

$654

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 4/14

5:00 pm-3:30 pm

2 stops17h 30m

Porto

Tue 4/21

5:00 am-4:36 pm

2 stops16h 36m

$711

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Mon 5/4

3:33 pm-3:30 pm

2 stops18h 57m

Porto

Tue 5/12

5:00 am-4:38 pm

2 stops16h 38m

$741

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 4/21

9:45 pm-3:25 pm

1 stop12h 40m

Porto

Sun 4/26

5:00 am-3:35 pm

1 stop15h 35m

$743

Washington, D.C.Lisbon

DCA - LIS

DCALIS

Washington, D.C. Reagan-National

Wed 5/6

11:00 am-4:00 pm

2 stops24h 00m

Lisbon Humberto Delgado

Sun 5/10

7:00 am-11:24 pm

2 stops21h 24m

$745

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 5/4

5:00 pm-3:25 pm

2 stops17h 25m

Porto

Tue 5/19

6:15 am-5:07 pm

2 stops15h 52m

$745

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sat 4/25

9:45 pm-10:00 pm

1 stop19h 15m

Porto

Thu 5/7

5:00 am-4:31 pm

2 stops16h 31m

$752

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 4/14

4:30 pm-3:45 pm

2 stops18h 15m

Porto

Mon 4/20

6:00 am-7:31 pm

2 stops18h 31m

$771

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 4/15

8:30 pm-12:40 am

3 stops23h 10m

Porto

Wed 4/22

7:10 am-10:20 pm

3 stops44h 10m

$777

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/14

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

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 $528). 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 March 16, 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 March 16, 2026.

The most flights from WAS to PT0 are scheduled on a Monday (5 on average). You will have fewer flight options on Monday, 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 27% of weekly flights between Washington, D.C. and Portugal have experienced delays in the past year, with the average delay time being 143 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 March 16, 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
8,288 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Entertainment

7.8

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
8,288 reviews
Delta
7.9
Good
8,288 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Entertainment

7.8

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
9,431 reviews
Delta
7.9
Good
8,288 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Entertainment

7.8

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
7.1
Good
2,167 reviews
Delta
7.9
Good
8,288 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Entertainment

7.8

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
7,858 reviews
Delta
7.9
Good
8,288 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Entertainment

7.8

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
581 reviews
Delta
7.9
Good
8,288 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Entertainment

7.8

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?

    TAP AIR PORTUGAL, Turkish Airlines, and Delta can get you from Washington, D.C. to Portugal in just under 17h 30m. Your travel time can differ by up to 19h 25m. 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 Royal Air Maroc from $338 and KLM from $356 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 Air Canada (79%), United Airlines (79%) and Lufthansa (79%).

  • 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 $1,499, our data indicates the cheapest price to be $316. The most popular route (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), is priced around $541.

  • 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 $528). 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 March 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$444Average$681FlexibilityNo cancel feeOn-time79%
TAP AIR PORTUGALCheapest$459Average$900FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$477Average$791FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$480Average$931FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$494Average$1,050FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$504Average$589FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$508Average$640FlexibilityNo cancel feeOn-time71%
IberiaCheapest$515Average$672FlexibilityNo cancel feeOn-time77%
DeltaCheapest$529Average$956FlexibilityNo cancel feeOn-timeN/A
Royal Air MarocCheapest$544Average$706FlexibilityNo cancel feeOn-time75%

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