HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$248+ 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LIS
Jul 16 — Jul 231
Wed 7/16
Wed 7/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington, D.C. to Portugal with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 July 11, 2025.

Round-trip from

$421
(Booking.com)

One-way from

$248
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,046

Good round-trip deal

$531 or less

Good one-way deal

$320 or less
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. 2% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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

Find 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 July 11, 2025.

This Booking.com deal was found by Cheapflights users on 7/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/76:50 pmBWI - LIS
1 stop20h 30mPLAY
Mon 9/159:25 pmLIS - BWI
1 stop25h 15mPLAY
Deal found 7/8$421
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Wed 11/56:15 amBWI - OPO
2 stops28h 10mUnited Airlines
Tue 11/1112:30 pmOPO - BWI
2 stops26h 29mUnited Airlines
Deal found 7/8$518
This Mytrip deal was found by Cheapflights users on 7/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/26:50 pmBWI - LIS
2 stops22h 40mMultiple Airlines
Sun 9/75:55 amLIS - BWI
2 stops16h 45mMultiple Airlines
Deal found 7/10$525
This oojo deal was found by Cheapflights users on 7/8. 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 11/3010:30 pmIAD - FNC
1 stop19h 25mTAP AIR PORTUGAL
Wed 12/1710:35 amFNC - IAD
1 stop15h 25mTAP AIR PORTUGAL
Deal found 7/8$526
This oojo deal was found by Cheapflights users on 7/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1310:20 pmIAD - PDL
1 stop16h 15mTAP AIR PORTUGAL
Mon 10/207:40 pmPDL - IAD
1 stop23h 40mTAP AIR PORTUGAL
Deal found 7/9$527
This Delta deal was found by Cheapflights users on 7/8. 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.
Sat 12/67:45 pmBWI - OPO
2 stops34h 05mDelta
Tue 12/166:05 amOPO - BWI
2 stops38h 47mDelta
Deal found 7/8$542
This oojo deal was found by Cheapflights users on 7/8. 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 11/910:30 pmIAD - FAO
1 stop12h 15mTAP AIR PORTUGAL
Sun 11/164:35 pmFAO - IAD
1 stop27h 40mTAP AIR PORTUGAL
Deal found 7/8$545
This British Airways deal was found by Cheapflights users on 7/8. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/28:35 pmBWI - OPO
1 stop16h 00mBritish Airways
Mon 12/155:30 pmOPO - BWI
1 stop30h 15mBritish Airways
Deal found 7/8$548
This FlightHub deal was found by Cheapflights users on 7/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/208:30 pmIAD - LIS
1 stop14h 35mScandinavian Airlines
Mon 12/14:55 pmLIS - IAD
2 stops47h 55mScandinavian Airlines
Deal found 7/10$556
This Mytrip deal was found by Cheapflights users on 7/8. 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 9/188:45 pmIAD - LIS
2 stops20h 55mMultiple Airlines
Tue 9/237:05 amLIS - IAD
2 stops19h 00mMultiple Airlines
Deal found 7/8$557
This Mytrip deal was found by Cheapflights users on 7/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1911:00 amDCA - LIS
3 stops18h 20mMultiple Airlines
Wed 8/2710:00 pmLIS - DCA
3 stops28h 48mMultiple Airlines
Deal found 7/10$559
This FlightHub deal was found by Cheapflights users on 7/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/211:30 pmIAD - LIS
1 stop21h 00mTurkish Airlines
Fri 11/74:05 pmLIS - IAD
1 stop32h 10mTurkish Airlines
Deal found 7/10$571

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 July 11, 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

BaltimoreLisbon

BWI - LIS

BWILIS

Baltimore/Washington

Sun 9/7

6:50 pm-8:20 pm

1 stop20h 30m

Lisbon Humberto Delgado

Mon 9/15

9:25 pm-5:40 pm

1 stop25h 15m

$421

BaltimoreLisbon

BWI - LIS

BWILIS

Baltimore/Washington

Tue 9/2

6:50 pm-10:30 pm

2 stops22h 40m

Lisbon Humberto Delgado

Sun 9/7

5:55 am-5:40 pm

2 stops16h 45m

$525

Washington, D.C.Funchal

IAD - FNC

IADFNC

Washington, D.C. Dulles Intl

Mon 9/15

10:20 pm-1:15 am

1 stop21h 55m

Funchal Madeira

Tue 9/23

4:05 am-3:20 pm

1 stop16h 15m

$527

Washington, D.C.Ponta Delgada

IAD - PDL

IADPDL

Washington, D.C. Dulles Intl

Mon 10/13

10:20 pm-6:35 pm

1 stop16h 15m

Ponta Delgada Nordela

Mon 10/20

7:40 pm-3:20 pm

1 stop23h 40m

$527

Washington, D.C.Faro

IAD - FAO

IADFAO

Washington, D.C. Dulles Intl

Wed 9/24

10:20 pm-11:50 pm

1 stop20h 30m

Faro

Thu 10/9

6:05 am-8:50 pm

1 stop19h 45m

$546

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Thu 10/2

8:30 pm-9:30 pm

2 stops20h 00m

Lisbon Humberto Delgado

Fri 10/10

9:10 am-10:10 pm

2 stops18h 00m

$547

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Thu 11/20

8:30 pm-4:05 pm

1 stop14h 35m

Lisbon Humberto Delgado

Mon 12/1

4:55 pm-11:50 am

2 stops47h 55m

$556

Washington, D.C.Lisbon

DCA - LIS

DCALIS

Washington, D.C. Reagan-National

Tue 8/19

11:00 am-10:20 am

3 stops18h 20m

Lisbon Humberto Delgado

Wed 8/27

10:00 pm-9:48 pm

3 stops28h 48m

$559

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Tue 10/21

1:30 pm-3:30 pm

1 stop21h 00m

Lisbon Humberto Delgado

Fri 11/7

4:05 pm-7:15 pm

1 stop32h 10m

$571

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Fri 11/7

8:45 pm-11:35 am

1 stop9h 50m

Lisbon Humberto Delgado

Thu 11/13

5:55 pm-6:45 pm

1 stop29h 50m

$610

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/9

Showing 1-10 of 60 results
1
2
3
...
6

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, January is the cheapest month in which you can book a flight from Washington, D.C. to Portugal (average of $612). Flying from Washington, D.C. to Portugal in June is currently the most expensive (average of $1,130). 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 July 11, 2025.

It’s typically best to fly out from Washington, D.C. to Portugal in the morning. Doing so could potentially save you 8% on the flight price compared to flying at noon, 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 Tuesday afternoons when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 July 11, 2025.
Read reviews from past customers who have flown Delta, KLM, and Air France 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
8.0
Very good
7,951 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,951 reviews
Delta
8.0
Very good
7,951 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,372 reviews
Delta
8.0
Very good
7,951 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,467 reviews
Delta
8.0
Very good
7,951 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,655 reviews
Delta
8.0
Very good
7,951 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,846 reviews
Delta
8.0
Very good
7,951 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • 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 $258 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include PLAY from $270 and Icelandair from $348 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 TAP AIR PORTUGAL (64%), JetBlue (64%) and Air Canada (46%).

  • 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 $2,054, our data indicates the cheapest price to be $231. The most popular route (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), is priced around $404.

  • 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 $612). Flying from Washington, D.C. to Portugal in June is currently the most expensive (average of $1,130). 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.

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
Dulles Intl to Charles de Gaulle flights
Dulles Intl to Leonardo da Vinci/Fiumicino flights
Dulles Intl to Madrid flights
Dulles Intl to Istanbul flights
Dulles Intl to Lisbon flights
Dulles Intl to Gatwick flights
Reagan-National to Heathrow flights
Dulles Intl to Athens flights
Dulles Intl to London City flights
Dulles Intl to Frankfurt flights
Dulles Intl to Barcelona-El Prat flights
Dulles Intl to Dublin flights
Reagan-National to Gatwick flights
Reagan-National to Charles de Gaulle flights
Dulles Intl to Orly flights
Reagan-National to Madrid flights
Reagan-National to Leonardo da Vinci/Fiumicino flights
Reagan-National to Orly flights
Dulles Intl to Amsterdam flights
Dulles Intl to Keflavik Intl flights
Dulles Intl to Zurich flights
Dulles Intl to Munich flights
Dulles Intl to Stansted flights
Reagan-National to Istanbul flights
Reagan-National to Lisbon flights
Dulles Intl to Bruxelles-National flights
Reagan-National to Athens flights
Dulles Intl to Luton flights
Dulles Intl to Edinburgh flights
Reagan-National to Dublin flights
Dulles Intl to Copenhagen flights
Dulles Intl to Geneva flights
Dulles Intl to Sabiha Gokcen flights
Reagan-National to Keflavik Intl flights
Reagan-National to Barcelona-El Prat flights
Reagan-National to Frankfurt flights
Dulles Intl to Vicenza flights
Dulles Intl to Vienna flights
Dulles Intl to Beauvais-Tille flights
Dulles Intl to Malpensa flights
Dulles Intl to Linate flights
Dulles Intl to Frederic Chopin flights
Reagan-National to London City flights
Reagan-National to Copenhagen flights
Reagan-National to Zurich flights
Reagan-National to Amsterdam flights
Reagan-National to Malpensa flights
Dulles Intl to Florence flights
Dulles Intl to Nice flights

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 July 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$333Average$382FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$418Average$1,119FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$430Average$809FlexibilityNo cancel feeOn-time75%
TAP AIR PORTUGALCheapest$460Average$920FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$508Average$745FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$510Average$905FlexibilityNo cancel feeOn-time70%
IberiaCheapest$515Average$753FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$520Average$1,072FlexibilityNo cancel feeOn-time69%
SWISSCheapest$542Average$666FlexibilityNo cancel feeOn-time79%
Royal Air MarocCheapest$552Average$650FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.