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Lisbon

$226+ 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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LIS
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
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 February or January, booked 88 days in advance, depart on a Monday or Tuesday and return on a Sunday

Find 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 November 6, 2025.

This KAYAK deal was found by Cheapflights users on 11/4. 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 11/267:49 pmIAD - LIS
2 stops38h 06mScandinavian Airlines
Fri 12/54:55 pmLIS - IAD
1 stop30h 55mScandinavian Airlines
Deal found 11/4$559
This FlightHub deal was found by Cheapflights users on 11/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/111:30 pmIAD - LIS
1 stop20h 35mTurkish Airlines
Tue 11/1811:30 amLIS - IAD
1 stop29h 15mTurkish Airlines
Deal found 11/3$561
This Mytrip deal was found by Cheapflights users on 11/4. 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 11/259:45 amIAD - LIS
3 stops22h 20mMultiple Airlines
Tue 12/28:55 pmLIS - IAD
2 stops23h 51mMultiple Airlines
Deal found 11/4$564
This Mytrip deal was found by Cheapflights users on 11/4. 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 12/15:05 pmIAD - LIS
1 stop15h 10mMultiple Airlines
Mon 12/89:30 pmLIS - IAD
1 stop23h 05mMultiple Airlines
Deal found 11/4$572
This Mytrip deal was found by Cheapflights users on 11/4. 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.
Sun 11/238:30 pmIAD - LIS
2 stops19h 45mMultiple Airlines
Mon 12/110:00 pmLIS - IAD
3 stops27h 59mMultiple Airlines
Deal found 11/4$575
This Mytrip deal was found by Cheapflights users on 11/5. 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 11/187:40 pmIAD - LIS
2 stops19h 10mMultiple Airlines
Wed 11/266:40 amLIS - IAD
2 stops16h 50mMultiple Airlines
Deal found 11/5$578
This Justfly.com deal was found by Cheapflights users on 11/4. 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.
Wed 11/267:49 pmIAD - LIS
2 stops38h 06mScandinavian Airlines
Sun 12/74:55 pmLIS - IAD
1 stop29h 20mScandinavian Airlines
Deal found 11/4$580
This Mytrip deal was found by Cheapflights users on 11/4. 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.
Sun 11/239:45 amIAD - LIS
3 stops30h 30mMultiple Airlines
Tue 12/27:00 pmLIS - IAD
3 stops30h 59mMultiple Airlines
Deal found 11/4$583
This KAYAK deal was found by Cheapflights users on 11/4. 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.
Mon 11/247:49 pmIAD - LIS
2 stops39h 16mScandinavian Airlines
Wed 12/34:55 pmLIS - IAD
1 stop29h 20mScandinavian Airlines
Deal found 11/4$589
This Justfly.com deal was found by Cheapflights users on 11/4. 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.
Thu 11/278:30 pmIAD - LIS
1 stop13h 25mScandinavian Airlines
Mon 12/84:55 pmLIS - IAD
2 stops31h 24mScandinavian Airlines
Deal found 11/4$590

Cheap 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 November 6, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$572
(KAYAK)

One-way from

$226
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$759

Good round-trip deal

$486 or less

Good one-way deal

$290 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. 15% potential increase in price ($170 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 6, 2025.
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

Sun 12/7

1:30 pm-3:05 pm

1 stop20h 35m

Lisbon Humberto Delgado

Tue 12/16

5:55 am-7:20 pm

1 stop18h 25m

$637

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Fri 11/14

1:30 pm-3:05 pm

1 stop20h 35m

Lisbon Humberto Delgado

Fri 11/21

11:40 am-11:45 am

1 stop29h 05m

$728

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 12/10

10:30 pm-10:35 am

Nonstop7h 05m

Lisbon Humberto Delgado

Wed 12/17

5:15 pm-9:00 pm

Nonstop8h 45m

$811

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Mon 12/29

10:05 pm-10:15 am

Nonstop7h 10m

Lisbon Humberto Delgado

Sun 1/11

5:00 am-8:15 pm

1 stop20h 15m

$826

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 12/31

10:05 pm-10:15 am

Nonstop7h 10m

Lisbon Humberto Delgado

Sun 1/11

5:00 am-2:35 pm

1 stop14h 35m

$826

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 12/31

7:40 pm-8:20 pm

1 stop19h 40m

Lisbon Humberto Delgado

Thu 1/8

9:20 pm-6:30 pm

1 stop26h 10m

$858

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Sun 11/30

10:30 pm-10:35 am

Nonstop7h 05m

Lisbon Humberto Delgado

Mon 12/15

11:25 am-3:15 pm

Nonstop8h 50m

$860

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 12/3

10:30 pm-10:35 am

Nonstop7h 05m

Lisbon Humberto Delgado

Sat 12/13

11:25 am-3:15 pm

Nonstop8h 50m

$860

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Tue 12/2

5:30 pm-5:35 am

Nonstop7h 05m

Lisbon Humberto Delgado

Mon 12/15

11:25 am-3:15 pm

Nonstop8h 50m

$860

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Sat 12/6

7:40 pm-8:20 pm

1 stop19h 40m

Lisbon Humberto Delgado

Sat 12/13

8:25 pm-6:30 pm

2 stops27h 05m

$870

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Showing 1-10 of 22 results
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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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 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 Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Washington, D.C. Dulles Intl Airport-Lisbon flight deals on Cheapflights vs. Justfly.com >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 Justfly.com the most. Justfly.com 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 October 31, 2025.

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 88 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 $346). Flying from Washington, D.C. Dulles Intl Airport to Lisbon in December is currently the most expensive (average of $553). 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 November 6, 2025.

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to Lisbon at noon. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight in the evening.

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Lisbon trip
Airports
IAD

For evening departures, expect the check-in area to be crowded. Arrive early to navigate the bustling terminal efficiently.

Read more about IADby Ramsey Qubein
LIS

Upon arrival at LIS, use the metro line for a quick 20-minute trip to downtown Lisbon from Terminal 1.

Read more about LISby Ramsey Qubein
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on LIS and IAD

Ramsey Qubein

Ramsey Qubein

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 November 6, 2025.
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
9,007 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,007 reviews
United Airlines
7.4
Good
9,007 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Turkish Airlines
7.3
Good
4,032 reviews
United Airlines
7.4
Good
9,007 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
TAP AIR PORTUGAL
7.1
Good
2,047 reviews
United Airlines
7.4
Good
9,007 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Lufthansa
6.8
Okay
7,558 reviews
United Airlines
7.4
Good
9,007 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Royal Air Maroc
6.2
Okay
525 reviews
United Airlines
7.4
Good
9,007 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 5 inbound flights from Washington, D.C. Dulles Intl per day from 12 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 7h 05m. Airlines will cover a distance of 3580 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 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 $504. Other airlines that can offer you cheap pricing are American Airlines, from $508, and TAP AIR PORTUGAL, from $508. Scandinavian Airlines is currently priced 44% below the average price you’ll pay for this route.

  • 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 (79%), TAP AIR PORTUGAL (79%) and Air Canada (75%).

  • 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 $205. On average you can expect to pay $1,415. The most popular route, (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), can usually be booked for $439.

  • 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 $346). Flying from Washington, D.C. Dulles Intl Airport to Lisbon in December is currently the most expensive (average of $553). 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
Sintra
Fátima
Oeiras
Ericeira
Nazaré
Costa da Caparica
Torres Vedras
Beja
Sesimbra
Colares

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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$504Average$599FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$508Average$646FlexibilityNo cancel feeOn-time71%
TAP AIR PORTUGALCheapest$508Average$887FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$510Average$680FlexibilityNo cancel feeOn-time70%
Royal Air MarocCheapest$552Average$677FlexibilityNo cancel feeOn-time75%
DeltaCheapest$563Average$816FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$585Average$668FlexibilityNo cancel feeOn-time77%
IberiaCheapest$592Average$770FlexibilityNo cancel feeOn-time77%
JetBlueCheapest$707Average$1,166FlexibilityNo cancel feeOn-time62%
LufthansaCheapest$741Average$1,078FlexibilityNo cancel feeOn-time76%

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