What is the most punctual flight time for Lisbon to Washington, D.C. flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

How often are flights from Lisbon to Washington, D.C. delayed?

About 29% of weekly flights between Lisbon and Washington, D.C. have experienced delays in the past year, with the average delay time being 135 minutes.

Which airline has the best punctuality record on Lisbon to Washington, D.C. flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 25% of flights being delayed.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

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 20h 15m. Fly via Scandinavian Airlines 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 $561. Another airline that can offer you cheap pricing is United Airlines. TAP AIR PORTUGAL is priced at 24% 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 TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at $367. JetBlue flights start at $395 while deals on Aer Lingus start at $416 one-way.

Weekly flight availability from Lisbon to Washington, D.C. Dulles Intl Airport

The most flights from LIS to IAD are scheduled on a Monday (5 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (3 on average).

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 $850, our data indicates the cheapest price to be $543. The most popular route (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), is priced around $483.

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

Consider Air Canada (72%), United Airlines (72%) or Lufthansa (72%) when booking your flight. These represent the most reliable airlines when flying from Lisbon to Washington, D.C. Dulles Intl Airport.

Most accurate provider : When it comes to deals on Lisbon-Washington, D.C. Dulles Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Lisbon-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

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.

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.

$465+ Flights from Lisbon to Washington, D.C. Dulles Intl Airport

Q: 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 $573 and $763 in January. The cheapest round-trip price found within the last 3 days was $492 on Multiple Airlines (Jan 21-Jan 28).

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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 December 9, 2025.

Tue 12/235:00 amLIS - IAD

1 stop15h 50mMultiple Airlines

Fri 1/238:30 pmIAD - LIS

1 stop13h 05mMultiple Airlines

Deal found 12/6

$593

Tue 12/235:00 amLIS - IAD

1 stop15h 50mUnited Airlines

Sat 1/310:05 pmIAD - LIS

Nonstop7h 10mUnited Airlines

Deal found 12/7

$594

Tue 12/235:00 amLIS - IAD

1 stop15h 50mUnited Airlines

Fri 1/235:20 pmIAD - LIS

2 stops34h 35mUnited Airlines

Deal found 12/6

$596

Wed 12/104:55 pmLIS - IAD

1 stop29h 20mScandinavian Airlines

Sat 1/248:30 pmIAD - LIS

1 stop14h 35mScandinavian Airlines

Deal found 12/6

$606

Wed 12/1711:55 amLIS - IAD

Nonstop8h 35mUnited Airlines

Wed 12/3110:05 pmIAD - LIS

Nonstop7h 10mUnited Airlines

Deal found 12/9

$621

Tue 12/1611:20 amLIS - IAD

1 stop14h 39mUnited Airlines

Mon 1/55:10 pmIAD - LIS

1 stop10h 00mUnited Airlines

Deal found 12/8

$624

Thu 12/1811:55 amLIS - IAD

Nonstop8h 35mUnited Airlines

Thu 1/89:45 amIAD - LIS

1 stop18h 35mUnited Airlines

Deal found 12/9

$625

Mon 12/1510:15 amLIS - IAD

1 stop11h 15mUnited Airlines

Mon 1/55:10 pmIAD - LIS

1 stop10h 00mUnited Airlines

Deal found 12/8

$627

Best flights from Lisbon to Dulles Intl
Discover carefully curated flight deals from Lisbon to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 9, 2025.

Wed 1/216:40 amLIS - IAD

2 stops16h 50mMultiple Airlines

Wed 1/287:40 pmIAD - LIS

2 stops16h 05mMultiple Airlines

Deal found 12/7

$492

Wed 4/84:25 pmLIS - IAD

1 stop29h 25mScandinavian Airlines

Mon 4/138:20 pmIAD - LIS

1 stop14h 15mScandinavian Airlines

Deal found 12/8

$510

Thu 1/155:00 amLIS - IAD

1 stop20h 15mUnited Airlines

Wed 1/288:29 amIAD - LIS

1 stop18h 41mUnited Airlines

Deal found 12/7

$594

Tue 2/175:00 amLIS - IAD

1 stop15h 50mLufthansa

Sun 2/2210:05 pmIAD - LIS

Nonstop7h 10mLufthansa

Deal found 12/8

$594

Tue 12/235:00 amLIS - IAD

1 stop15h 50mMultiple Airlines

Fri 1/238:30 pmIAD - LIS

1 stop13h 05mMultiple Airlines

Deal found 12/6

$593

Tue 12/235:00 amLIS - IAD

1 stop15h 50mUnited Airlines

Sat 1/310:05 pmIAD - LIS

Nonstop7h 10mUnited Airlines

Deal found 12/7

$594

Sun 3/155:00 amLIS - IAD

1 stop15h 50mUnited Airlines

Thu 4/910:10 pmIAD - LIS

Nonstop7h 20mUnited Airlines

Deal found 12/8

$594

Tue 12/235:00 amLIS - IAD

1 stop15h 50mUnited Airlines

Fri 1/235:20 pmIAD - LIS

2 stops34h 35mUnited Airlines

Deal found 12/6

$596

Sat 4/117:25 amLIS - IAD

1 stop13h 25mUnited Airlines

Tue 4/141:00 pmIAD - LIS

1 stop15h 20mUnited Airlines

Deal found 12/8

$597

Fri 3/205:00 amLIS - IAD

1 stop15h 50mUnited Airlines

Tue 4/75:35 pmIAD - LIS

1 stop10h 45mUnited Airlines

Deal found 12/8

$597

Wed 1/215:00 amLIS - IAD

1 stop15h 50mUnited Airlines

Wed 1/285:10 pmIAD - LIS

2 stops35h 10mUnited Airlines

Deal found 12/7

$597

Last-minute flights from Lisbon to Dulles Intl
Discover last-minute flight deals from Lisbon to Dulles Intl. Data last updated December 9, 2025 and is based on user searches.

Mon 12/1510:15 amLIS - IAD

1 stop11h 15mUnited Airlines

Mon 1/55:10 pmIAD - LIS

1 stop10h 00mUnited Airlines

Deal found 12/8

$627

Tue 12/1611:20 amLIS - IAD

1 stop14h 39mUnited Airlines

Mon 1/55:10 pmIAD - LIS

1 stop10h 00mUnited Airlines

Deal found 12/8

$624

Wed 12/1711:55 amLIS - IAD

Nonstop8h 35mUnited Airlines

Wed 12/3110:05 pmIAD - LIS

Nonstop7h 10mUnited Airlines

Deal found 12/9

$621

Wed 12/1711:00 amLIS - IAD

2 stops15h 22mAir Canada

Wed 12/311:15 pmIAD - LIS

2 stops14h 40mAir Canada

Deal found 12/9

$638

Thu 12/1811:55 amLIS - IAD

Nonstop8h 35mUnited Airlines

Thu 1/89:45 amIAD - LIS

1 stop18h 35mUnited Airlines

Deal found 12/9

$625

Thu 12/185:30 amLIS - IAD

1 stop16h 05mDelta

Thu 1/87:49 pmIAD - LIS

2 stops16h 41mDelta

Deal found 12/7

$682

Thu 12/1810:55 amLIS - IAD

2 stops15h 30mAir Canada

Thu 1/812:43 pmIAD - LIS

2 stops15h 37mAir Canada

Deal found 12/7

$693

One-way flights from Lisbon to Dulles Intl
Search for one-way flight options from Lisbon to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated December 9, 2025.

Thu 1/2211:35 amLIS - IAD

3 stops33h 58mMultiple Airlines

Deal found 12/7

$465

Sat 1/249:20 pmLIS - IAD

3 stops26h 25mMultiple Airlines

Deal found 12/8

$472

Thu 6/411:45 pmLIS - IAD

3 stops24h 15mMultiple Airlines

Deal found 12/7

$473

Tue 5/1910:30 pmLIS - IAD

3 stops25h 30mMultiple Airlines

Deal found 12/7

$474

Thu 1/225:55 pmLIS - IAD

1 stop29h 50mRoyal Air Maroc

Deal found 12/7

$475

Mon 4/132:10 pmLIS - IAD

3 stops25h 14mMultiple Airlines

Deal found 12/8

$476

Wed 1/2112:35 pmLIS - IAD

3 stops32h 53mMultiple Airlines

Deal found 12/8

$477

Sun 1/116:55 pmLIS - IAD

1 stop25h 40mAer Lingus

Deal found 12/7

$478

Fri 4/37:00 amLIS - IAD

2 stops17h 00mMultiple Airlines

Deal found 12/7

$483

Tue 12/235:55 pmLIS - IAD

1 stop29h 50mRoyal Air Maroc

Deal found 12/9

$487

Sat 1/175:55 pmLIS - IAD

1 stop29h 50mRoyal Air Maroc

Deal found 12/7

$488

Thu 12/185:55 pmLIS - IAD

1 stop29h 50mRoyal Air Maroc

Deal found 12/9

$490

Find flight deals from Lisbon to Dulles Intl

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$492 (Mytrip)
One-way from	$465 (Kiwi.com)
Popular in	July
Cheapest in	December
Average price	$635
Good round-trip deal	$713 or less
Good one-way deal	$607 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. 9% potential increase in price ($80 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 December 2025

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

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

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Wed 1/21

6:40 am-6:30 pm

2 stops16h 50m

Washington, D.C. Dulles Intl

Wed 1/28

7:40 pm-4:45 pm

2 stops16h 05m

$492

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Wed 4/8

4:25 pm-4:50 pm

1 stop29h 25m

Washington, D.C. Dulles Intl

Mon 4/13

8:20 pm-3:35 pm

1 stop14h 15m

$510

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Tue 12/23

5:00 am-3:50 pm

1 stop15h 50m

Washington, D.C. Dulles Intl

Fri 1/23

8:30 pm-2:35 pm

1 stop13h 05m

$593

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 1/15

5:00 am-8:15 pm

1 stop20h 15m

Washington, D.C. Dulles Intl

Wed 1/28

8:29 am-8:10 am

1 stop18h 41m

$594

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Tue 2/17

5:00 am-3:50 pm

1 stop15h 50m

Washington, D.C. Dulles Intl

Sun 2/22

10:05 pm-10:15 am

Nonstop7h 10m

$594

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Tue 12/23

5:00 am-3:50 pm

1 stop15h 50m

Washington, D.C. Dulles Intl

Sat 1/3

10:05 pm-10:15 am

Nonstop7h 10m

$594

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sun 3/15

5:00 am-4:50 pm

1 stop15h 50m

Washington, D.C. Dulles Intl

Thu 4/9

10:10 pm-10:30 am

Nonstop7h 20m

$594

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Tue 12/23

5:00 am-3:50 pm

1 stop15h 50m

Washington, D.C. Dulles Intl

Fri 1/23

5:20 pm-8:55 am

2 stops34h 35m

$596

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sat 4/11

7:25 am-3:50 pm

1 stop13h 25m

Washington, D.C. Dulles Intl

Tue 4/14

1:00 pm-9:20 am

1 stop15h 20m

$597

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 3/20

5:00 am-4:50 pm

1 stop15h 50m

Washington, D.C. Dulles Intl

Tue 4/7

5:35 pm-9:20 am

1 stop10h 45m

$597

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

Showing 1-10 of 21 results

Compare providers for flights from Lisbon to Dulles Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Lisbon to Dulles Intl in December.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 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 Lisbon-Washington, D.C. Dulles Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Lisbon-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

Prices

Airlines

Delays

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

Currently, February is the cheapest month in which you can book a flight from Lisbon to Washington, D.C. Dulles Intl Airport (average of $493). Flying from Lisbon to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $695). 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?

It’s typically best to fly out from Lisbon to Washington, D.C. Dulles Intl Airport at noon. Doing so could potentially save you 40% on the flight price compared to flying in the morning, which is usually more expensive.

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

Cheapflights partnered with top experts to bring you the best recommendations for your Lisbon to Washington, D.C. Dulles Intl Airport trip

Airports

LIS

Expect long lines at immigration in Terminal 1 for non-Schengen flights, especially in the morning and early afternoon.

IAD

The Silver Line Metro reaches IAD in under 40 minutes, offering a cheap way to get to Washington, D.C.

Our travel experts

Ramsey Qubein

Expert on LIS and IAD

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

7.4

Good

9,089 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

United Airlines

7.4

Good

9,089 reviews

United Airlines

7.4

Good

9,089 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

TAP AIR PORTUGAL

7.1

Good

2,085 reviews

United Airlines

7.4

Good

9,089 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

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 20h 15m. Fly via Scandinavian Airlines 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 $561. Another airline that can offer you cheap pricing is United Airlines. TAP AIR PORTUGAL is priced at 24% 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 TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at $367. JetBlue flights start at $395 while deals on Aer Lingus start at $416 one-way.
What are the most reliable airlines from Lisbon to Washington, D.C. Dulles Intl Airport?
Consider Air Canada (72%), United Airlines (72%) or Lufthansa (72%) 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 $850, our data indicates the cheapest price to be $543. The most popular route (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), is priced around $483.
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, February is the cheapest month in which you can book a flight from Lisbon to Washington, D.C. Dulles Intl Airport (average of $493). Flying from Lisbon to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $695). 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.

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Top 2 airlines flying from Lisbon to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest$561	Average$721	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$573	Average$777	FlexibilityNo cancel fee	On-time69%

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$465+ 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Lisbon to Dulles Intl

Cheapest flights from Lisbon to Dulles IntlExplore 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 December 9, 2025.

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 December 9, 2025.

Find flight deals from Lisbon to Dulles Intl

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

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.

Compare providers for flights from Lisbon to Dulles Intl

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 Lisbon to Dulles Intl in December.

Best time to book a flight from Lisbon to Dulles Intl

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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?

What is the cheapest time of day to fly from LIS to IAD?

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

Weekly flight availability from Lisbon to Washington, D.C. Dulles Intl Airport

How often are flights from Lisbon to Washington, D.C. delayed?

What is the most punctual flight time for Lisbon to Washington, D.C. flights?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on Lisbon to Washington, D.C. flights?

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

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Airports

LIS

IAD

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Reviews of airlines servicing Dulles Intl

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?

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

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

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

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

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

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

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

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

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

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Alternative routes for Lisbon to Dulles Intl

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Top 2 airlines flying from Lisbon to Dulles Intl

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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 December 9, 2025.