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Dulles Intl

$391+ Cheap flights from Lisbon (LIS) to Dulles Intl (IAD)

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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — IAD
May 24 — May 311
Sun 5/24
Sun 5/31
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 April 24, 2026.

This FlightHub deal was found by Cheapflights users on 4/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:40 pm
LIS
-
IAD
1 stop29h 20m
Royal Air Maroc
Wed 10/289:45 pm
IAD
-
LIS
1 stop15h 10m
Royal Air Maroc
Deal found 4/22$679
This Justfly.com deal was found by Cheapflights users on 4/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:40 am
LIS
-
IAD
Nonstop8h 30m
TAP AIR PORTUGAL
Mon 11/25:25 pm
IAD
-
LIS
Nonstop7h 10m
TAP AIR PORTUGAL
Deal found 4/22$683
This Gotogate deal was found by Cheapflights users on 4/23. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/315:05 am
LIS
-
IAD
1 stop13h 30m
Lufthansa
Mon 9/75:55 pm
IAD
-
LIS
1 stop16h 35m
Lufthansa
Deal found 4/23$688
This Gotogate deal was found by Cheapflights users on 4/24. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/85:05 am
LIS
-
IAD
1 stop13h 30m
Lufthansa
Mon 6/1510:20 pm
IAD
-
LIS
1 stop19h 25m
Lufthansa
Deal found 4/24$693
This Gotogate deal was found by Cheapflights users on 4/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:25 am
LIS
-
IAD
1 stop13h 40m
Lufthansa
Tue 5/2610:20 pm
IAD
-
LIS
1 stop19h 25m
Lufthansa
Deal found 4/20$699
This Royal Air Maroc deal was found by Cheapflights users on 4/22. 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 Royal Air Maroc is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:40 pm
LIS
-
IAD
1 stop29h 20m
Royal Air Maroc
Mon 11/28:45 pm
IAD
-
LIS
1 stop15h 10m
Royal Air Maroc
Deal found 4/22$702
This Lufthansa deal was found by Cheapflights users on 4/24. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:25 am
LIS
-
IAD
1 stop13h 40m
Multiple Airlines
Fri 5/298:20 pm
IAD
-
LIS
1 stop15h 05m
Multiple Airlines
Deal found 4/24$703
This Gotogate deal was found by Cheapflights users on 4/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2611:25 am
LIS
-
IAD
Nonstop8h 50m
TAP AIR PORTUGAL
Fri 1/110:30 pm
IAD
-
LIS
Nonstop7h 10m
TAP AIR PORTUGAL
Deal found 4/20$704
This United Airlines deal was found by Cheapflights users on 4/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/265:00 am
LIS
-
IAD
1 stop20h 15m
United Airlines
Fri 1/110:05 pm
IAD
-
LIS
Nonstop7h 10m
United Airlines
Deal found 4/23$705
This United Airlines deal was found by Cheapflights users on 4/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:05 am
LIS
-
IAD
1 stop16h 00m
United Airlines
Mon 10/2611:05 pm
IAD
-
LIS
Nonstop7h 10m
United Airlines
Deal found 4/22$706
This American Airlines deal was found by Cheapflights users on 4/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/258:20 am
LIS
-
IAD
1 stop13h 00m
American Airlines
Thu 12/319:45 pm
IAD
-
LIS
1 stop15h 15m
American Airlines
Deal found 4/23$708

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 April 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$679
(FlightHub)

One-way from

$391
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$767

Good round-trip deal

$872 or less

Good one-way deal

$692 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
One-way flight from Lisbon Humberto Delgado to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($132 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 24, 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

Mon 5/11

5:05 am-4:05 pm

1 stop16h 00m

Washington, D.C. Dulles Intl

Tue 5/26

10:25 pm-10:30 am

Nonstop7h 05m

$706

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Tue 6/23

6:45 am-3:55 pm

1 stop14h 10m

Washington, D.C. Dulles Intl

Sun 8/30

3:45 pm-9:20 am

1 stop12h 35m

$710
Quickest round-trip

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 5/21

12:20 pm-3:15 pm

Nonstop7h 55m

Washington, D.C. Dulles Intl

Tue 6/2

8:20 pm-2:45 pm

1 stop13h 25m

$733

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sun 5/17

12:20 pm-3:25 pm

Nonstop8h 05m

Washington, D.C. Dulles Intl

Sun 6/7

8:20 pm-2:45 pm

1 stop13h 25m

$734

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 5/21

12:20 pm-3:15 pm

Nonstop7h 55m

Washington, D.C. Dulles Intl

Thu 5/28

8:20 pm-2:45 pm

1 stop13h 25m

$735

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Mon 5/11

7:55 pm-1:30 pm

1 stop22h 35m

Washington, D.C. Dulles Intl

Tue 5/26

5:35 pm-11:10 am

1 stop12h 35m

$742

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Mon 8/31

5:55 am-3:30 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Mon 9/7

5:40 pm-1:45 pm

2 stops15h 05m

$748

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Mon 5/11

5:55 am-4:45 pm

1 stop15h 50m

Washington, D.C. Dulles Intl

Tue 5/26

5:40 pm-1:45 pm

2 stops15h 05m

$750

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 5/15

5:55 am-8:15 pm

2 stops19h 20m

Washington, D.C. Dulles Intl

Sat 5/30

8:20 pm-11:25 pm

1 stop22h 05m

$758

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Wed 7/8

5:55 am-4:45 pm

1 stop15h 50m

Washington, D.C. Dulles Intl

Tue 11/3

10:05 pm-10:15 am

Nonstop7h 10m

$768

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/19

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3
  • 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, January is the cheapest month in which you can book a flight from Lisbon to Washington, D.C. Dulles Intl Airport (average of $544). Flying from Lisbon to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $1,014). 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 April 24, 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?

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 April 24, 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
9,646 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,646 reviews
United Airlines
7.4
Good
9,646 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
TAP AIR PORTUGAL
7.1
Good
2,220 reviews
United Airlines
7.4
Good
9,646 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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 5 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 14h 10m. Fly via Lufthansa or United Airlines 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 34% 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 $354. 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 Air Canada (67%), United Airlines (67%) or Lufthansa (67%) 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 $1,494, our data indicates the cheapest price to be $585. The most popular route (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), is priced around $688.

  • 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, January is the cheapest month in which you can book a flight from Lisbon to Washington, D.C. Dulles Intl Airport (average of $544). Flying from Lisbon to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $1,014). 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
Owings Mills
Springfield
Arlington
Woodbridge
Silver Spring
Herndon
Rockville
Hyattsville
Fredericksburg
Hanover
Laurel
Manassas
Largo
Upper Marlboro
Waldorf
Bowie
Clinton
Hunt Valley

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 April 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$497Average$789FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$562Average$705FlexibilityNo cancel feeOn-timeN/A

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