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

Saturday 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.

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

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

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

Over the last year, TAP AIR PORTUGAL have had the lowest number of delays on this route, with just 21% of flights being delayed.

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

About 24% of weekly flights between Washington, D.C. and Lisbon have experienced delays in the past year, with the average delay time being 149 minutes.

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 7h 05m. 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 $548. Scandinavian Airlines is currently priced 51% 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 JetBlue, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to Lisbon for a low price.

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

The most flights from IAD to LIS are scheduled on a Monday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

In terms of precipitation, rainfall in Lisbon ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Lisbon when rainfall is around 0.2 in.

If weather is an important factor for your trip to Lisbon, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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 $382. On average you can expect to pay $1,696. The most popular route, (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), can usually be booked for $672.

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 (80%), TAP AIR PORTUGAL (80%) and airBaltic (68%).

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

When booking a flight from Washington, D.C. Dulles Intl Airport to Lisbon, you may want to consider flying on TAP AIR PORTUGAL, United Airlines or Royal Air Maroc as they are the most popular for this route.

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.

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 4 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.

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.

$406+ Cheap Flights from Washington, D.C. Dulles Intl Airport to Lisbon

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

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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 43 days in advance, depart on a Monday or Wednesday and return on a Friday

Cheap flight deals from Dulles Intl to Lisbon

Cheapest

Best

Last-minute

One-way

Cheapest flights from Dulles Intl to Lisbon
Explore the most affordable flight options available from Dulles Intl to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 12, 2026.

Sun 10/118:00 pm -

2 stops44h 10m

Tue 10/208:25 am -

1 stop15h 25m

Deal found 8/10

$650

Mon 9/2811:12 am -

2 stops28h 58m

Thu 10/88:25 am -

1 stop15h 25m

Deal found 8/9

$662

Sat 10/108:30 pm -

2 stops31h 30m

Sat 10/246:35 am -

1 stop13h 55m

Deal found 8/11

$667

Fri 11/279:05 pm -

1 stop9h 30m

Wed 12/211:40 am -

1 stop12h 25m

Deal found 8/7

$670

Wed 11/49:05 pm -

1 stop9h 30m

Sun 11/812:35 pm -

1 stop11h 30m

Deal found 8/7

$671

Fri 11/279:05 pm -

1 stop9h 30m

Thu 12/35:55 pm -

1 stop30h 10m

Deal found 8/11

$672

Sun 11/19:05 pm -

1 stop9h 30m

Thu 11/55:55 pm -

1 stop30h 10m

Deal found 8/10

$673

Wed 10/219:00 pm -

1 stop9h 50m

Wed 11/411:40 am -

1 stop12h 25m

Deal found 8/7

$674

Sun 10/189:00 pm -

1 stop15h 40m

Thu 10/226:40 pm -

1 stop29h 20m

Deal found 8/9

$677

Best flights from Dulles Intl to Lisbon
Discover carefully curated flight deals from Dulles Intl to Lisbon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 12, 2026.

Wed 10/2110:25 pm -

Nonstop7h 05m

Wed 11/45:00 am -

1 stop20h 05m

Deal found 8/7

$749

Sat 1/2310:10 pm -

1 stop29h 00m

Sun 1/315:00 am -

1 stop15h 55m

Deal found 8/9

$806

Wed 10/710:20 pm -

1 stop14h 30m

Wed 10/215:00 am -

2 stops17h 33m

Deal found 8/10

$825

Tue 10/1310:25 pm -

Nonstop7h 05m

Wed 10/216:45 am -

1 stop14h 20m

Deal found 8/7

$780

Mon 9/2812:26 pm -

2 stops15h 24m

Wed 10/75:00 am -

2 stops16h 28m

Deal found 8/9

$830

Fri 10/3011:30 pm -

Nonstop6h 50m

Sat 11/75:00 am -

1 stop15h 55m

Deal found 8/11

$849

Sun 10/410:25 pm -

Nonstop7h 05m

Thu 10/155:05 am -

1 stop13h 30m

Deal found 8/8

$810

Fri 10/306:32 pm -

2 stops16h 38m

Sun 11/85:00 am -

2 stops17h 33m

Deal found 8/7

$870

Tue 10/61:05 pm -

2 stops15h 15m

Mon 10/197:25 am -

1 stop35h 10m

Deal found 8/10

$838

Thu 10/1510:25 pm -

Nonstop7h 05m

Wed 10/215:05 am -

1 stop16h 00m

Deal found 8/10

$860

Fri 12/258:30 am -

2 stops19h 50m

Thu 12/315:00 am -

1 stop14h 35m

Deal found 8/11

$868

Sat 10/310:19 pm -

1 stop31h 46m

Sat 10/175:05 am -

1 stop13h 30m

Deal found 8/11

$879

Last-minute flights from Dulles Intl to Lisbon
Discover last-minute flight deals from Dulles Intl to Lisbon. Data last updated August 12, 2026 and is based on user searches.

Wed 9/169:00 pm -

1 stop9h 50m

Thu 10/295:55 pm -

1 stop30h 10m

Deal found 8/9

$704

Sat 9/1910:35 pm -

Nonstop7h 20m

Fri 9/255:15 pm -

Nonstop8h 20m

Deal found 8/10

$685

Sat 9/268:30 pm -

2 stops22h 00m

Wed 11/118:20 am -

1 stop13h 00m

Deal found 8/7

$699

Sat 9/268:30 pm -

2 stops22h 00m

Tue 10/68:25 am -

1 stop15h 25m

Deal found 8/11

$700

Mon 9/2811:12 am -

2 stops28h 58m

Thu 10/88:25 am -

1 stop15h 25m

Deal found 8/9

$662

Mon 9/289:55 am -

1 stop20h 25m

Wed 10/145:40 pm -

2 stops26h 20m

Deal found 8/9

$701

Wed 9/309:00 pm -

1 stop15h 40m

Thu 10/86:40 pm -

1 stop29h 20m

Deal found 8/11

$675

Wed 9/309:00 pm -

1 stop15h 40m

Tue 10/66:40 pm -

1 stop29h 20m

Deal found 8/7

$697

Wed 9/309:00 pm -

1 stop9h 50m

Sun 10/46:40 pm -

1 stop29h 20m

Deal found 8/9

$702

One-way flights from Dulles Intl to Lisbon
Search for one-way flight options from Dulles Intl to Lisbon. Find affordable one-way fares based on user searches. Data last updated August 12, 2026.

Sat 8/2911:20 pm -

3 stops38h 45m

Deal found 8/7

$406

Sat 9/2611:25 am -

1 stop17h 10m

Deal found 8/10

$408

Mon 8/178:30 pm -

3 stops38h 10m

Deal found 8/6

$409

Mon 9/219:04 pm -

3 stops45h 01m

Deal found 8/10

$410

Mon 8/319:00 pm -

1 stop15h 40m

Deal found 8/11

$412

Tue 8/1811:20 pm -

3 stops28h 10m

Deal found 8/8

$413

Fri 8/288:30 pm -

3 stops22h 10m

Deal found 8/9

$416

Tue 9/13:50 pm -

2 stops33h 40m

Deal found 8/9

$420

Sun 9/68:30 pm -

3 stops20h 35m

Deal found 8/10

$421

Find flight deals from Dulles Intl to Lisbon

Most accurate provider	Ovago 3 stars
Most trusted provider	Ovago 3 stars
Round-trip from	$650 (Kiwi.com)
One-way from	$406 (Kiwi.com)
Popular in	June
Cheapest in	January
Average price	$1,035
Good round-trip deal	$646 or less
Good one-way deal	$531 or less

Provider with most accurate pricing for Washington, D.C. Dulles Intl-Lisbon Humberto Delgado flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Lisbon Humberto Delgado flights.

Search Deals

From Washington, D.C. Dulles Intl to Lisbon Humberto Delgado

Search Deals

One-way flight from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado

Search Deals

Highest demand for flights based on searches. 22% potential increase in price ($283 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado.

Search Deals

Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado.

Search Deals

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

Wed 10/21

10:25 pm-10:30 am

Nonstop7h 05m

Lisbon Humberto Delgado

Wed 11/4

5:00 am-8:05 pm

1 stop20h 05m

$749

Washington, D.C.Lisbon

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

IADLIS

Washington, D.C. Dulles Intl

Tue 10/13

10:25 pm-10:30 am

Nonstop7h 05m

Lisbon Humberto Delgado

Wed 10/21

6:45 am-4:05 pm

1 stop14h 20m

$780

Washington, D.C.Lisbon

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

IADLIS

Washington, D.C. Dulles Intl

Sat 1/23

10:10 pm-8:10 am

1 stop29h 00m

Lisbon Humberto Delgado

Sun 1/31

5:00 am-3:55 pm

1 stop15h 55m

$806

Quickest round-trip

Washington, D.C.Lisbon

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

IADLIS

Washington, D.C. Dulles Intl

Sun 10/4

10:25 pm-10:30 am

Nonstop7h 05m

Lisbon Humberto Delgado

Thu 10/15

5:05 am-1:35 pm

1 stop13h 30m

$810

Washington, D.C.Lisbon

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

IADLIS

Washington, D.C. Dulles Intl

Wed 10/7

10:20 pm-5:50 pm

1 stop14h 30m

Lisbon Humberto Delgado

Wed 10/21

5:00 am-5:33 pm

2 stops17h 33m

$825

Washington, D.C.Lisbon

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

IADLIS

Washington, D.C. Dulles Intl

Mon 9/28

12:26 pm-8:50 am

2 stops15h 24m

Lisbon Humberto Delgado

Wed 10/7

5:00 am-4:28 pm

2 stops16h 28m

$830

Washington, D.C.Lisbon

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

IADLIS

Washington, D.C. Dulles Intl

Tue 10/6

1:05 pm-9:20 am

2 stops15h 15m

Lisbon Humberto Delgado

Mon 10/19

7:25 am-1:35 pm

1 stop35h 10m

$838

Washington, D.C.Lisbon

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

IADLIS

Washington, D.C. Dulles Intl

Fri 10/30

11:30 pm-10:20 am

Nonstop6h 50m

Lisbon Humberto Delgado

Sat 11/7

5:00 am-3:55 pm

1 stop15h 55m

$849

Washington, D.C.Lisbon

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

IADLIS

Washington, D.C. Dulles Intl

Thu 10/15

10:25 pm-10:30 am

Nonstop7h 05m

Lisbon Humberto Delgado

Wed 10/21

5:05 am-4:05 pm

1 stop16h 00m

$860

Washington, D.C.Lisbon

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

IADLIS

Washington, D.C. Dulles Intl

Fri 12/25

8:30 am-9:20 am

2 stops19h 50m

Lisbon Humberto Delgado

Thu 12/31

5:00 am-2:35 pm

1 stop14h 35m

$868

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/7

Showing 1-10 of 22 resultsSorted by cheapest first

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 August.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
Ovago	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
Justfly.com	Price Accuracy3 stars	Trust Score*3 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy2 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy2 stars	Trust 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.

IAD-LIS

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 Washington, D.C. Dulles Intl Airport to Lisbon

Prices

Airlines

Delays

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 42 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 $1,429). 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 $924 and $1,223 in October.
The cheapest round-trip price found within the last 5 days was $650 on Multiple Airlines (Oct 11-Oct 20).

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

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.

See what other customers who have flown with Turkish Airlines,United Airlines, andTAP AIR PORTUGAL 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.

Turkish Airlines

7.4

Good

4,479 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2026

MIA - IST

The cabin is very clean, the service is great, the food is excellent

Turkish Airlines

7.4

Good

4,479 reviews

Turkish Airlines

7.4

Good

4,479 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2026

MIA - IST

The cabin is very clean, the service is great, the food is excellent

United Airlines

7.4

Good

10,111 reviews

Turkish Airlines

7.4

Good

4,479 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2026

MIA - IST

The cabin is very clean, the service is great, the food is excellent

TAP AIR PORTUGAL

7.2

Good

2,364 reviews

Turkish Airlines

7.4

Good

4,479 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2026

MIA - IST

The cabin is very clean, the service is great, the food is excellent

Lufthansa

6.8

Okay

8,179 reviews

Turkish Airlines

7.4

Good

4,479 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2026

MIA - IST

The cabin is very clean, the service is great, the food is excellent

Royal Air Maroc

6.2

Okay

625 reviews

Turkish Airlines

7.4

Good

4,479 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2026

MIA - IST

The cabin is very clean, the service is great, the food is excellent

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 4 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 7h 05m. 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 $548. Scandinavian Airlines is currently priced 51% 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 JetBlue, 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 (80%), TAP AIR PORTUGAL (80%) and airBaltic (68%).
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 $382. On average you can expect to pay $1,696. The most popular route, (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), can usually be booked for $672.
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 $1,429). 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

Fátima

Ericeira

Oeiras

Beja

Torres Vedras

Nazaré

Colares

Sesimbra

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

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Other flight options

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Popular flights

Alternative routes for Dulles Intl to Lisbon

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Baltimore to Lajes flights

Top 7 airlines flying from Dulles Intl to Lisbon

Airline	Cheapest	Average	Flexibility	On-time
Scandinavian Airlines	Cheapest$481	Average$589	FlexibilityNo cancel fee	On-time77%
Royal Air Maroc	Cheapest$544	Average$715	FlexibilityNo cancel fee	On-time75%
TAP AIR PORTUGAL	Cheapest$548	Average$1,028	FlexibilityNo cancel fee	On-timeN/A
Turkish Airlines	Cheapest$580	Average$668	FlexibilityNo cancel fee	On-time77%
United Airlines	Cheapest$790	Average$1,246	FlexibilityNo cancel fee	On-time69%
Lufthansa	Cheapest$1,054	Average$1,528	FlexibilityNo cancel fee	On-time76%
JetBlue	Cheapest$1,069	Average$1,258	FlexibilityNo cancel fee	On-time62%

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$406+ Cheap flights from Dulles Intl (IAD) to Lisbon (LIS)

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 8/29. 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 Dulles Intl to Lisbon

Cheapest flights from Dulles Intl to LisbonExplore the most affordable flight options available from Dulles Intl to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 12, 2026.

Explore the most affordable flight options available from Dulles Intl to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 12, 2026.

Best flights from Dulles Intl to LisbonDiscover carefully curated flight deals from Dulles Intl to Lisbon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 12, 2026.

Discover carefully curated flight deals from Dulles Intl to Lisbon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 12, 2026.

Last-minute flights from Dulles Intl to LisbonDiscover last-minute flight deals from Dulles Intl to Lisbon. Data last updated August 12, 2026 and is based on user searches.

Discover last-minute flight deals from Dulles Intl to Lisbon. Data last updated August 12, 2026 and is based on user searches.

One-way flights from Dulles Intl to LisbonSearch for one-way flight options from Dulles Intl to Lisbon. Find affordable one-way fares based on user searches. Data last updated August 12, 2026.

Search for one-way flight options from Dulles Intl to Lisbon. Find affordable one-way fares based on user searches. Data last updated August 12, 2026.

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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.

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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.

Cheapflights Insights

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 42 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?

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 $924 and $1,223 in October.The cheapest round-trip price found within the last 5 days was $650 on Multiple Airlines (Oct 11-Oct 20).

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

The most flights from IAD to LIS are scheduled on a Monday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

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

About 24% of weekly flights between Washington, D.C. and Lisbon have experienced delays in the past year, with the average delay time being 149 minutes.

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

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

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

Saturday 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.

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

Over the last year, TAP AIR PORTUGAL have had the lowest number of delays on this route, with just 21% of flights being delayed.

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

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Reviews of airlines servicing Lisbon

See what other customers who have flown with Turkish Airlines,United Airlines, andTAP AIR PORTUGAL 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.

Related info for your journey

What airport do you fly into for flights to Lisbon from Washington, D.C. Dulles Intl?

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

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

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

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

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

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

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

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

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

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Alternative routes for Dulles Intl to Lisbon

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Other flights to Lisbon

Explore flights to Lisbon departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 12, 2026.

Dulles Intl and Lisbon flights

Cheapest flights from Dulles Intl to Lisbon
Explore the most affordable flight options available from Dulles Intl to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 12, 2026.

Best flights from Dulles Intl to Lisbon
Discover carefully curated flight deals from Dulles Intl to Lisbon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 12, 2026.

Last-minute flights from Dulles Intl to Lisbon
Discover last-minute flight deals from Dulles Intl to Lisbon. Data last updated August 12, 2026 and is based on user searches.

One-way flights from Dulles Intl to Lisbon
Search for one-way flight options from Dulles Intl to Lisbon. Find affordable one-way fares based on user searches. Data last updated August 12, 2026.

Washington, D.C. Dulles Intl Airport to Lisbon flights typically cost between $924 and $1,223 in October.
The cheapest round-trip price found within the last 5 days was $650 on Multiple Airlines (Oct 11-Oct 20).