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Lisbon

$423+ Cheap flights from Dulles Intl (IAD) to Lisbon (LIS)

IAD — LIS
Oct 20 — Oct 271
Tue 10/20
Tue 10/27
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 32 days in advance, depart on a Wednesday or Monday and return on a Friday

Cheap flight deals from Dulles Intl to Lisbon

Cheapest flights from Dulles Intl to Lisbon

Thu 11/129:55 am -
2 stops15h 50m
Tue 11/179:25 am -
2 stops35h 20m
Deal found 9/15$660
Mon 11/29:55 am -
3 stops32h 10m
Tue 11/177:00 pm -
3 stops30h 23m
Deal found 9/16$666
Mon 9/288:55 pm -
1 stop19h 40m
Wed 10/710:15 pm -
1 stop25h 55m
Deal found 9/16$669
Wed 10/215:00 pm -
1 stop12h 20m
Thu 10/296:00 am -
1 stop15h 20m
Deal found 9/16$670
Sat 11/145:25 pm -
Nonstop7h 10m
Thu 11/2611:25 am -
Nonstop8h 50m
Deal found 9/16$671
Mon 11/165:25 pm -
Nonstop7h 10m
Wed 11/254:40 pm -
Nonstop8h 50m
Deal found 9/16$674
Tue 10/135:15 pm -
2 stops22h 20m
Sat 10/2410:00 pm -
2 stops27h 20m
Deal found 9/16$675
Thu 12/109:55 am -
3 stops31h 40m
Fri 12/186:00 am -
2 stops19h 23m
Deal found 9/15$678
Sun 11/18:10 pm -
2 stops22h 15m
Tue 11/102:50 pm -
2 stops31h 10m
Deal found 9/16$679
Thu 11/58:10 pm -
2 stops21h 25m
Thu 11/126:00 am -
2 stops19h 23m
Deal found 9/16$680
Tue 11/175:25 pm -
Nonstop7h 10m
Thu 11/2611:25 am -
Nonstop8h 50m
Deal found 9/17$681
Wed 11/1810:30 pm -
Nonstop7h 10m
Wed 12/24:40 pm -
Nonstop8h 50m
Deal found 9/17$684

Find flight deals from Dulles Intl to Lisbon

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$660
(Mytrip)

One-way from

$423
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,055

Good round-trip deal

$705 or less

Good one-way deal

$486 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Lisbon Humberto Delgado flights.
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From Washington, D.C. Dulles Intl to Lisbon Humberto Delgado
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One-way flight from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado
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Highest demand for flights based on searches. 21% potential increase in price ($269 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado.
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Cheapflights Fare Finder

 
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Lisbon

IAD Washington, D.C. Dulles Intl - LIS Lisbon Humberto Delgado

IADLIS

Washington, D.C. Dulles Intl

Mon 11/23

10:11 am-8:00 am

2 stops16h 49m

Lisbon Humberto Delgado

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$559

Washington, D.C.Lisbon

IAD Washington, D.C. Dulles Intl - LIS Lisbon Humberto Delgado

IADLIS

Washington, D.C. Dulles Intl

Tue 10/27

10:14 am-9:00 am

2 stops18h 46m

Lisbon Humberto Delgado

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$559

Washington, D.C.Lisbon

IAD Washington, D.C. Dulles Intl - LIS Lisbon Humberto Delgado

IADLIS

Washington, D.C. Dulles Intl

Tue 11/24

6:00 am-8:00 am

2 stops21h 00m

Lisbon Humberto Delgado

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$559

Washington, D.C.Lisbon

IAD Washington, D.C. Dulles Intl - LIS Lisbon Humberto Delgado

IADLIS

Washington, D.C. Dulles Intl

Sun 11/22

6:20 pm-5:30 pm

2 stops18h 10m

Lisbon Humberto Delgado

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$563

Washington, D.C.Lisbon

IAD Washington, D.C. Dulles Intl - LIS Lisbon Humberto Delgado

IADLIS

Washington, D.C. Dulles Intl

Sat 10/31

6:50 pm-11:10 pm

2 stops48h 20m

Lisbon Humberto Delgado

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$593

Washington, D.C.Lisbon

IAD Washington, D.C. Dulles Intl - LIS Lisbon Humberto Delgado

IADLIS

Washington, D.C. Dulles Intl

Sat 10/31

6:31 pm-2:40 pm

2 stops16h 09m

Lisbon Humberto Delgado

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$618

Washington, D.C.Lisbon

IAD Washington, D.C. Dulles Intl - LIS Lisbon Humberto Delgado

IADLIS

Washington, D.C. Dulles Intl

Fri 12/25

4:25 pm-2:40 pm

2 stops17h 15m

Lisbon Humberto Delgado

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$618
Quickest round-trip

Washington, D.C.Lisbon

IAD Washington, D.C. Dulles Intl - LIS Lisbon Humberto Delgado

IADLIS

Washington, D.C. Dulles Intl

Sun 10/25

11:15 pm-10:05 am

Nonstop6h 50m

Lisbon Humberto Delgado

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$675

Washington, D.C.Lisbon

IAD Washington, D.C. Dulles Intl - LIS Lisbon Humberto Delgado

IADLIS

Washington, D.C. Dulles Intl

Tue 10/27

11:15 pm-10:05 am

Nonstop6h 50m

Lisbon Humberto Delgado

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$675

Washington, D.C.Lisbon

IAD Washington, D.C. Dulles Intl - LIS Lisbon Humberto Delgado

IADLIS

Washington, D.C. Dulles Intl

Tue 11/3

10:35 pm-6:55 am

2 stops27h 20m

Lisbon Humberto Delgado

Fri 11/20

11:20 am-8:53 pm

2 stops38h 33m

$760

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 21 resultsSorted by cheapest first
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Compare providers for flights from Dulles Intl to Lisbon

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 September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star

*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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Washington, D.C. Dulles Intl Airport-Lisbon flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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

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?

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 31 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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Lisbon (average of $665). Flying from Washington, D.C. Dulles Intl Airport to Lisbon in June is currently the most expensive (average of $1,427). 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?

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.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Lisbon?

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to Lisbon flights typically cost between $816 and $1,201 in November.
The cheapest round-trip price found within the last 5 days was $660 on Multiple Airlines (Nov 12-Nov 17).

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

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

See what other customers who have flown with United Airlines,TAP AIR PORTUGAL, andJetBlue 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
10,230 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
10,230 reviews
United Airlines
7.4
Good
10,230 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
TAP AIR PORTUGAL
7.2
Good
2,377 reviews
United Airlines
7.4
Good
10,230 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
JetBlue
7.1
Good
3,032 reviews
United Airlines
7.4
Good
10,230 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Lufthansa
6.8
Okay
8,236 reviews
United Airlines
7.4
Good
10,230 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Royal Air Maroc
6.2
Okay
625 reviews
United Airlines
7.4
Good
10,230 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Related info for your journey

  • 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 7 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 6h 50m. 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 $481. Other airlines that can offer you cheap pricing are Royal Air Maroc, from $544, and TAP AIR PORTUGAL, from $549. Scandinavian Airlines is currently priced 52% 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 Royal Air Maroc, with whom users have recently found tickets for as low as $338. However, be on the lookout for offers from TAP AIR PORTUGAL and United Airlines, 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 (81%), TAP AIR PORTUGAL (81%) and airBaltic (80%).

  • 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 $396. On average you can expect to pay $1,707. The most popular route, (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), can usually be booked for $459.

  • 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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Lisbon (average of $665). Flying from Washington, D.C. Dulles Intl Airport to Lisbon in June is currently the most expensive (average of $1,427). 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
Ericeira
Oeiras
Torres Vedras
Beja
Nazaré
Colares
Sesimbra

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Dulles Intl to Lisbon

Reagan-National to Lisbon flights
Baltimore to Lisbon flights
Dulles Intl to Porto flights
Dulles Intl to Funchal flights
Baltimore to Lajes flights

Top 7 airlines flying from Dulles Intl to Lisbon

AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$481Average$599FlexibilityNo cancel feeOn-time77%
Royal Air MarocCheapest$544Average$722FlexibilityNo cancel feeOn-time75%
TAP AIR PORTUGALCheapest$550Average$1,057FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$580Average$667FlexibilityNo cancel feeOn-time77%
JetBlueCheapest$758Average$1,261FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$790Average$1,269FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$1,054Average$1,496FlexibilityNo cancel feeOn-time76%

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