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Dulles Intl

$373+ Cheap flights from Lisbon (LIS) to Dulles Intl (IAD)

LIS — IAD
Nov 23 — Nov 301
Mon 11/23
Mon 11/30
1 adult, Economy
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Cheapflights Tip: The best prices from Lisbon Humberto Delgado to Washington, D.C. Dulles Intl are usually found in March or February, booked 15 days in advance, depart on a Friday or Wednesday and return on a Wednesday

Cheap flight deals from Lisbon to Dulles Intl

Cheapest flights from Lisbon to Dulles Intl

Wed 12/22:05 pm -
2 stops29h 05m
Wed 12/96:00 pm -
2 stops21h 25m
Deal found 10/19$581
Tue 12/2211:40 am -
1 stop11h 50m
Sat 1/237:40 pm -
1 stop12h 10m
Deal found 10/21$590
Thu 12/102:00 pm -
1 stop33h 30m
Wed 4/78:30 pm -
1 stop12h 20m
Deal found 10/22$607
Thu 11/196:05 am -
1 stop19h 00m
Wed 11/2510:55 pm -
1 stop19h 35m
Deal found 10/20$623
Thu 11/1911:25 am -
Nonstop8h 50m
Wed 11/2510:30 pm -
Nonstop7h 10m
Deal found 10/21$629
Sun 12/272:00 pm -
1 stop33h 30m
Wed 1/67:40 pm -
1 stop12h 10m
Deal found 10/20$632
Thu 12/32:05 pm -
2 stops29h 05m
Thu 12/1010:55 pm -
2 stops19h 05m
Deal found 10/19$634
Wed 12/911:40 am -
1 stop12h 25m
Wed 4/79:00 pm -
1 stop9h 50m
Deal found 10/22$635
Thu 11/510:20 pm -
2 stops25h 45m
Thu 11/125:25 pm -
Nonstop7h 10m
Deal found 10/22$642
Thu 11/510:20 pm -
2 stops25h 45m
Mon 11/95:25 pm -
Nonstop7h 10m
Deal found 10/20$647
Tue 12/82:00 pm -
1 stop33h 30m
Mon 4/58:30 pm -
1 stop12h 20m
Deal found 10/22$652

Find flight deals from Lisbon to Dulles Intl

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$581
(Mytrip)

One-way from

$373
(Kiwi.com)

Popular in

July

Cheapest in

March

Average price

$678

Good round-trip deal

$736 or less

Good one-way deal

$958 or less
Provider with most accurate pricing for Lisbon Humberto Delgado-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Washington, D.C. Dulles Intl flights.
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From Lisbon Humberto Delgado to Washington, D.C. Dulles Intl
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One-way flight from Lisbon Humberto Delgado to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 11% potential increase in price ($108 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Price to beat on a round-trip flight from Lisbon Humberto Delgado to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Lisbon Humberto Delgado to Washington, D.C. Dulles Intl.
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Cheapflights Fare Finder

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

LISIAD

Lisbon Humberto Delgado

Sat 12/12

6:30 am-4:20 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$462

LisbonWashington, D.C.

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

LISIAD

Lisbon Humberto Delgado

Sun 12/27

9:05 pm-4:20 pm

2 stops24h 15m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$519
Quickest round-trip

LisbonWashington, D.C.

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

LISIAD

Lisbon Humberto Delgado

Tue 12/15

10:50 am-2:40 pm

Nonstop8h 50m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$600

LisbonWashington, D.C.

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

LISIAD

Lisbon Humberto Delgado

Sat 12/12

11:25 am-3:15 pm

Nonstop8h 50m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$600

LisbonWashington, D.C.

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

LISIAD

Lisbon Humberto Delgado

Sun 12/6

4:45 pm-8:35 pm

Nonstop8h 50m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$600

LisbonWashington, D.C.

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

LISIAD

Lisbon Humberto Delgado

Fri 12/11

3:35 pm-7:20 pm

3 stops32h 45m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$611

LisbonWashington, D.C.

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

LISIAD

Lisbon Humberto Delgado

Sun 12/6

6:50 pm-7:55 pm

1 stop30h 05m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$630

LisbonWashington, D.C.

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

LISIAD

Lisbon Humberto Delgado

Thu 11/19

5:00 am-3:55 pm

1 stop15h 55m

Washington, D.C. Dulles Intl

Wed 11/25

6:40 pm-3:10 pm

1 stop15h 30m

$689

LisbonWashington, D.C.

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

LISIAD

Lisbon Humberto Delgado

Fri 11/6

5:00 am-3:55 pm

1 stop15h 55m

Washington, D.C. Dulles Intl

Thu 11/12

6:40 pm-11:25 am

1 stop11h 45m

$693

LisbonWashington, D.C.

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

LISIAD

Lisbon Humberto Delgado

Wed 11/18

5:00 am-5:28 pm

2 stops17h 28m

Washington, D.C. Dulles Intl

Wed 11/25

6:40 pm-3:10 pm

1 stop15h 30m

$695

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/23

Showing 1-10 of 20 resultsSorted by cheapest first
1
2
  • 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

Cheapflights Insights

Everything you need to know about your flight from Lisbon to Washington, D.C. Dulles Intl Airport

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

To ensure you get the cheapest price possible for a flight from Lisbon to Washington, D.C. Dulles Intl Airport, you should look to book at least 14 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, March is the cheapest month in which you can book a flight from Lisbon to Washington, D.C. Dulles Intl Airport (average of $669). Flying from Lisbon to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $973). 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?

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 $630 and $747 in December.
The cheapest round-trip price found within the last 5 days was $581 on Multiple Airlines (Dec 2-Dec 9).

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

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

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
7.3
Good
10,430 reviews

Entertainment

7.1

Food

6.7

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

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
7.3
Good
10,430 reviews
United Airlines
7.3
Good
10,430 reviews

Entertainment

7.1

Food

6.7

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

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
2,384 reviews
United Airlines
7.3
Good
10,430 reviews

Entertainment

7.1

Food

6.7

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

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

  • 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 3 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 17h 28m. Fly via Delta to get the fastest option. The distance from Lisbon to Washington, D.C. Dulles Intl Airport is about 3580 mi.

  • 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 37% 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. American Airlines flights start at $370 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 (74%), TAP AIR PORTUGAL (74%) or Air Canada (56%) 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 $1,563, our data indicates the cheapest price to be $699. The most popular route (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), is priced around $591.

  • 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, March is the cheapest month in which you can book a flight from Lisbon to Washington, D.C. Dulles Intl Airport (average of $669). Flying from Lisbon to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $973). 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
Chantilly
Woodbridge
Arlington
Owings Mills
Lanham
Sterling
Reston
Herndon
Hyattsville
Rockville
Springfield
Fredericksburg
Falls Church
Tysons
Towson
Oxon Hill
Laurel
Clinton
Hunt Valley

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Lisbon to Dulles Intl

Lisbon to Baltimore flights

Top 2 airlines flying from Lisbon to Dulles Intl

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$497Average$881FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$614Average$857FlexibilityNo cancel feeOn-timeN/A

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