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Lisbon

$257+ Cheap flights from Dulles Intl (IAD) to Lisbon (LIS)

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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LIS
Mar 21 — Mar 281
Sat 3/21
Sat 3/28
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado are usually found in January or February, booked 83 days in advance, depart on a Monday or Wednesday and return on a Sunday

Cheap flight deals from Dulles Intl to Lisbon

Cheapest flights from Dulles Intl to Lisbon
Explore the most affordable flight options available from Dulles Intl to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 19, 2026.

This CrystalTravel deal was found by Cheapflights users on 2/17. 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.
Sun 10/259:45 pm
IAD
-
LIS
1 stop9h 50m
Royal Air Maroc
Wed 11/412:35 pm
LIS
-
IAD
1 stop11h 10m
Royal Air Maroc
Deal found 2/17$529
This FlightHub deal was found by Cheapflights users on 2/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/128:20 pm
IAD
-
LIS
1 stop14h 15m
Scandinavian Airlines
Sat 4/184:25 pm
LIS
-
IAD
1 stop29h 25m
Scandinavian Airlines
Deal found 2/15$531
This oojo deal was found by Cheapflights users on 2/15. 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.
Sat 3/149:30 pm
IAD
-
LIS
1 stop15h 40m
Scandinavian Airlines
Wed 3/184:55 pm
LIS
-
IAD
1 stop29h 20m
Scandinavian Airlines
Deal found 2/15$533
This FlightHub deal was found by Cheapflights users on 2/17. 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 4/48:20 pm
IAD
-
LIS
1 stop14h 45m
Scandinavian Airlines
Tue 4/145:00 pm
LIS
-
IAD
1 stop29h 00m
Scandinavian Airlines
Deal found 2/17$534
This oojo deal was found by Cheapflights users on 2/16. 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.
Mon 4/208:20 pm
IAD
-
LIS
1 stop14h 30m
Scandinavian Airlines
Wed 4/294:25 pm
LIS
-
IAD
1 stop29h 35m
Scandinavian Airlines
Deal found 2/16$536
This Kiwi.com deal was found by Cheapflights users on 2/15. 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 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
Wed 4/294:25 pm
LIS
-
IAD
1 stop29h 25m
Scandinavian Airlines
Deal found 2/15$537
This CrystalTravel deal was found by Cheapflights users on 2/16. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/98:20 pm
IAD
-
LIS
1 stop19h 05m
Scandinavian Airlines
Tue 4/1412:45 pm
LIS
-
IAD
2 stops33h 15m
Scandinavian Airlines
Deal found 2/16$541
This FlightHub deal was found by Cheapflights users on 2/17. 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 4/128:20 pm
IAD
-
LIS
1 stop14h 15m
Scandinavian Airlines
Thu 4/167:00 am
LIS
-
IAD
2 stops34h 05m
Scandinavian Airlines
Deal found 2/17$544
This CrystalTravel deal was found by Cheapflights users on 2/18. 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.
Sun 4/128:20 pm
IAD
-
LIS
1 stop14h 15m
Scandinavian Airlines
Tue 4/2112:25 pm
LIS
-
IAD
2 stops33h 35m
Scandinavian Airlines
Deal found 2/18$545
This oojo deal was found by Cheapflights users on 2/15. 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.
Sun 4/198:20 pm
IAD
-
LIS
1 stop14h 15m
Scandinavian Airlines
Sun 4/267:15 am
LIS
-
IAD
1 stop14h 35m
Scandinavian Airlines
Deal found 2/15$546

Find flight deals from Dulles Intl to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Lisbon (LIS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$531
(FlightHub)

One-way from

$257
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$759

Good round-trip deal

$580 or less

Good one-way deal

$396 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Lisbon Humberto Delgado flights.
Search Deals
From Washington, D.C. Dulles Intl to Lisbon Humberto Delgado
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($193 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Lisbon 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 February 19, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Lisbon that are best for you.

Fly from

Dulles Intl

Fly to

Lisbon

Route

Depart

Return

Price

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Mon 4/6

8:20 pm-3:50 pm

1 stop14h 30m

Lisbon Humberto Delgado

Fri 4/17

9:15 pm-5:00 pm

1 stop24h 45m

$654

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 3/11

9:30 pm-5:55 pm

2 stops16h 25m

Lisbon Humberto Delgado

Wed 3/18

7:05 am-6:15 pm

1 stop15h 10m

$697

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Tue 3/10

1:19 pm-4:05 pm

2 stops22h 46m

Lisbon Humberto Delgado

Wed 3/18

6:10 pm-6:15 pm

2 stops28h 05m

$715

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Tue 3/3

12:24 pm-4:05 pm

2 stops22h 41m

Lisbon Humberto Delgado

Wed 3/11

7:05 am-6:15 pm

1 stop15h 10m

$774

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Tue 4/14

8:15 am-11:05 am

2 stops21h 50m

Lisbon Humberto Delgado

Tue 4/21

5:05 am-4:05 pm

1 stop16h 00m

$789

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Tue 4/14

5:07 pm-2:55 pm

2 stops16h 48m

Lisbon Humberto Delgado

Fri 4/24

5:00 am-3:35 pm

1 stop15h 35m

$791

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 4/15

12:45 pm-2:55 pm

2 stops21h 10m

Lisbon Humberto Delgado

Tue 4/21

11:55 am-3:35 pm

1 stop32h 40m

$791

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 4/15

12:42 pm-8:50 am

2 stops15h 08m

Lisbon Humberto Delgado

Tue 4/28

11:55 am-3:35 pm

1 stop32h 40m

$791

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Mon 4/20

10:30 pm-10:30 am

Nonstop7h 00m

Lisbon Humberto Delgado

Wed 4/29

12:20 pm-3:25 pm

Nonstop8h 05m

$793

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Mon 3/23

8:09 am-11:20 am

3 stops47h 11m

$284

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 19 results
1
2

Compare providers for flights from Dulles Intl to Lisbon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Lisbon in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Lisbon flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Lisbon flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Lisbon flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Lisbon flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Lisbon flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Dulles Intl 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. Dulles Intl Airport to Lisbon

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Lisbon?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Lisbon. Price data was last updated on February 18, 2026.

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Lisbon may vary depending on when you book. For the best chance of a lower fare, look to book 83 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Lisbon?

Currently, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Lisbon (average of $345). Flying from Washington, D.C. Dulles Intl Airport to Lisbon in December is currently the most expensive (average of $549). 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 IAD to LIS?

Find hourly flight availability from Dulles Intl to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 19, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to Lisbon as you normally would.

The best insider tips for Washington, D.C. Dulles Intl Airport to Lisbon flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Lisbon trip
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on LIS and IAD

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. 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 Lisbon. Reviews last updated February 19, 2026.
See what other customers who have flown with United Airlines, Turkish Airlines, and TAP AIR PORTUGAL from Washington, D.C. Dulles Intl Airport to Lisbon have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,324 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,324 reviews
United Airlines
7.4
Good
9,324 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Turkish Airlines
7.3
Good
4,224 reviews
United Airlines
7.4
Good
9,324 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
TAP AIR PORTUGAL
7.1
Good
2,145 reviews
United Airlines
7.4
Good
9,324 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Lufthansa
6.8
Okay
7,789 reviews
United Airlines
7.4
Good
9,324 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Royal Air Maroc
6.2
Okay
578 reviews
United Airlines
7.4
Good
9,324 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Lisbon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Lisbon from Washington, D.C. Dulles Intl?

    Most people fly into Lisbon Humberto Delgado (LIS) if they book a flight to Lisbon from Washington, D.C. Dulles Intl. On average, Humberto Delgado has 3 inbound flights from Washington, D.C. Dulles Intl per day from 11 airlines. Lisbon Humberto Delgado is conveniently located just 4.2 mi from Lisbon’s city center.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Lisbon?

    Departing from Washington, D.C. Dulles Intl Airport to Lisbon will take you 36h 50m. Airlines will cover a distance of 3580 mi.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Lisbon round-trip?

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to Lisbon round-trip from $425. Other airlines that can offer you cheap pricing are British Airways, from $480, and Scandinavian Airlines, from $481. TAP AIR PORTUGAL is currently priced 53% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Lisbon one-way?

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $333. However, be on the lookout for offers from Royal Air Maroc and Lufthansa, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to Lisbon for a low price.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Lisbon?

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Lisbon are JetBlue (76%), TAP AIR PORTUGAL (76%) and Air Canada (63%).

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Lisbon?

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to Lisbon is $292. On average you can expect to pay $1,686. The most popular route, (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), can usually be booked for $491.

  • Can I find deals for flights from Dulles Intl to Lisbon that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Lisbon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Lisbon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Lisbon.

  • Can I find deals for business class flights from Dulles Intl to Lisbon?

    Yes. Cheapflights offers flight deals from Dulles Intl to Lisbon 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. Dulles Intl Airport to Lisbon?

    Currently, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Lisbon (average of $345). Flying from Washington, D.C. Dulles Intl Airport to Lisbon in December is currently the most expensive (average of $549). 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 Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Fátima
Oeiras
Ericeira
Beja
Costa da Caparica
Torres Vedras
Nazaré
Colares
Sesimbra

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Dulles Intl to Lisbon

Discover the top 10 airlines that operate flights from Dulles Intl to Lisbon. 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 February 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$425Average$870FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$480Average$694FlexibilityNo cancel feeOn-time70%
Scandinavian AirlinesCheapest$481Average$599FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$508Average$646FlexibilityNo cancel feeOn-time71%
Royal Air MarocCheapest$544Average$690FlexibilityNo cancel feeOn-time75%
JetBlueCheapest$547Average$1,147FlexibilityNo cancel feeOn-time62%
Turkish AirlinesCheapest$585Average$664FlexibilityNo cancel feeOn-time77%
IberiaCheapest$603Average$799FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$737Average$1,125FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$744Average$1,198FlexibilityNo cancel feeOn-time69%

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