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Dulles Intl

$467+ Cheap flights from Lisbon (LIS) to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — IAD
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
1 adult, Economy
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Cheap flight deals from Lisbon to Dulles Intl

Cheapest flights from Lisbon to Dulles Intl
Explore the most affordable flight options available from Lisbon to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 25, 2026.

This lol.travel deal was found by Cheapflights users on 7/23. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:35 am
LIS
-
IAD
1 stop13h 55m
Finnair
Thu 8/138:30 pm
IAD
-
LIS
1 stop21h 55m
Finnair
Deal found 7/23$467
This ResecentrumGruppen deal was found by Cheapflights users on 7/24. 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 ResecentrumGruppen is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:35 am
LIS
-
IAD
1 stop13h 55m
Multiple Airlines
Thu 8/1310:25 pm
IAD
-
LIS
1 stop14h 45m
Multiple Airlines
Deal found 7/24$473
This Rumbo deal was found by Cheapflights users on 7/24. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:35 am
LIS
-
IAD
1 stop13h 55m
Multiple Airlines
Sat 8/1510:25 pm
IAD
-
LIS
1 stop14h 40m
Multiple Airlines
Deal found 7/24$480
This Flysmarter deal was found by Cheapflights users on 7/22. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:35 am
LIS
-
IAD
1 stop17h 20m
Multiple Airlines
Wed 8/129:30 pm
IAD
-
LIS
1 stop15h 25m
Multiple Airlines
Deal found 7/22$481
This Rumbo deal was found by Cheapflights users on 7/23. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:35 am
LIS
-
IAD
1 stop17h 20m
Multiple Airlines
Sat 8/159:30 pm
IAD
-
LIS
1 stop13h 50m
Multiple Airlines
Deal found 7/23$484
This Finnair deal was found by Cheapflights users on 7/21. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:30 am
LIS
-
IAD
1 stop14h 50m
Multiple Airlines
Mon 11/169:45 pm
IAD
-
LIS
1 stop19h 10m
Multiple Airlines
Deal found 7/21$491
This AOBTravel deal was found by Cheapflights users on 7/22. 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 AOBTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:35 am
LIS
-
IAD
1 stop13h 55m
British Airways
Tue 8/115:34 pm
IAD
-
LIS
2 stops15h 56m
British Airways
Deal found 7/22$497

Find flight deals from Lisbon to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Lisbon (LIS) to Dulles Intl (IAD). 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 July 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$467
(lol.travel)

Popular in

August

Cheapest in

December

Average price

$973

Good round-trip deal

$765 or less

Good one-way deal

$697 or less
Provider with most accurate pricing for Lisbon Humberto Delgado-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Washington, D.C. Dulles Intl flights.
Search Deals
From Lisbon Humberto Delgado to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($189 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Lisbon Humberto Delgado to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Lisbon Humberto Delgado to Washington, D.C. Dulles Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Lisbon to Dulles Intl 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 25, 2026.
Use the filters below to find and compare flights from Lisbon to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 8/7

6:35 am-3:30 pm

1 stop13h 55m

Washington, D.C. Dulles Intl

Thu 8/13

10:25 pm-6:10 pm

1 stop14h 45m

$490

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 11/20

5:00 am-3:55 pm

1 stop15h 55m

Washington, D.C. Dulles Intl

Mon 11/23

10:30 pm-10:20 am

Nonstop6h 50m

$547

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sat 8/29

5:05 am-8:00 pm

1 stop19h 55m

Washington, D.C. Dulles Intl

Mon 8/31

10:25 pm-10:30 am

Nonstop7h 05m

$549

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 8/7

12:20 pm-3:15 pm

Nonstop7h 55m

Washington, D.C. Dulles Intl

Thu 8/13

10:25 pm-10:30 am

Nonstop7h 05m

$573

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 8/28

12:20 pm-3:15 pm

Nonstop7h 55m

Washington, D.C. Dulles Intl

Sun 9/6

10:25 pm-10:30 am

Nonstop7h 05m

$573

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 8/6

12:20 pm-3:15 pm

Nonstop7h 55m

Washington, D.C. Dulles Intl

Wed 8/12

8:35 am-8:20 am

1 stop18h 45m

$574

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 11/13

12:20 pm-3:40 pm

Nonstop8h 20m

Washington, D.C. Dulles Intl

Mon 11/16

10:30 pm-10:20 am

Nonstop6h 50m

$575
Quickest round-trip

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Mon 8/31

12:20 pm-3:15 pm

Nonstop7h 55m

Washington, D.C. Dulles Intl

Sun 9/6

10:25 pm-10:30 am

Nonstop7h 05m

$576

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sat 8/29

12:20 pm-3:15 pm

Nonstop7h 55m

Washington, D.C. Dulles Intl

Mon 8/31

10:25 pm-10:30 am

Nonstop7h 05m

$576

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 8/7

5:05 am-4:05 pm

1 stop16h 00m

Washington, D.C. Dulles Intl

Thu 8/13

10:25 pm-10:30 am

Nonstop7h 05m

$580

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
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  • Most accurate provider: When it comes to deals on Lisbon-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Lisbon-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Lisbon-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Lisbon-Washington, D.C. Dulles Intl Airport 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 Lisbon-Washington, D.C. Dulles Intl Airport 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 Lisbon to Dulles Intl

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

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

Currently, December is the cheapest month in which you can book a flight from Lisbon to Washington, D.C. Dulles Intl Airport (average of $599). Flying from Lisbon to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of $1,298). 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 LIS to IAD?

Find hourly flight availability from Lisbon to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 25, 2026.

When flying from Lisbon to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Airfare is below average for this route at the moment.

Lisbon to Washington, D.C. Dulles Intl Airport flights typically cost between $928 and $1,194 in August.
The cheapest round-trip price found within the last 5 days was $467 on Finnair (Aug 7-Aug 13).

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

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated July 25, 2026.
Peruse reviews from past customers who have flown with United Airlines and TAP AIR PORTUGAL from Lisbon to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,034 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

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
10,034 reviews
United Airlines
7.4
Good
10,034 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

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
7.2
Good
2,346 reviews
United Airlines
7.4
Good
10,034 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

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 Lisbon to Dulles Intl. 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 from for flights from Lisbon to Washington, D.C. Dulles Intl?

    Most people fly from Lisbon Humberto Delgado (LIS) if they book a flight from Lisbon to Washington, D.C. Dulles Intl. On average, Humberto Delgado has 6 outbound flights to Washington, D.C. Dulles Intl per day from 2 airlines. Lisbon Humberto Delgado is conveniently located just 4.2 mi from Lisbon’s city center.

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

    There are many flights that can get you from Lisbon to Washington, D.C. Dulles Intl Airport in 15h 55m. Fly via United Airlines or Lufthansa to get the fastest option. The distance from Lisbon to Washington, D.C. Dulles Intl Airport is about 3580 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Lisbon to Washington, D.C. Dulles Intl Airport round-trip from $497. Another airline that can offer you cheap pricing is TAP AIR PORTUGAL. United Airlines is priced at 41% lower than the current average price of a flight leaving 3 months from now.

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

    To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $348. TAP AIR PORTUGAL flights start at $365 while deals on British Airways start at $378 one-way.

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

    Consider JetBlue (69%), TAP AIR PORTUGAL (69%) or Air Canada (66%) when booking your flight. These represent the most reliable airlines when flying from Lisbon to Washington, D.C. Dulles Intl Airport.

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

    Looking for the cheapest flight from Lisbon to Washington, D.C. Dulles Intl Airport? While on average our users pay $1,880, our data indicates the cheapest price to be $576. The most popular route (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), is priced around $484.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Lisbon to Dulles Intl 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 Lisbon to Washington, D.C. Dulles Intl Airport?

    Currently, December is the cheapest month in which you can book a flight from Lisbon to Washington, D.C. Dulles Intl Airport (average of $599). Flying from Lisbon to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of $1,298). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Tysons
Arlington
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Chantilly
Hyattsville
Fredericksburg
Falls Church
Hanover
Manassas
Laurel
Sterling
Clinton
Hunt Valley
Cordova

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Lisbon to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Lisbon to Baltimore flights

Top 2 airlines flying from Lisbon to Dulles Intl

Discover the top 2 airlines that operate flights from Lisbon to Dulles Intl. 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 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$497Average$881FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$569Average$973FlexibilityNo cancel feeOn-timeN/A

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