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

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

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

About 28% of weekly flights between Washington, D.C. and Lisbon have experienced delays in the past year, with the average delay time being 140 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.

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 26% of flights being delayed.

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 14h 20m. 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 $444. Other airlines that can offer you cheap pricing are British Airways, from $480, and Scandinavian Airlines, from $481. TAP AIR PORTUGAL 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 TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $336. However, be on the lookout for offers from Royal Air Maroc and Scandinavian Airlines, 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 (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 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 $271. On average you can expect to pay $1,486. The most popular route, (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), can usually be booked for $472.

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 Air Canada (76%), United Airlines (76%) and Lufthansa (76%).

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 Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Washington, D.C. Dulles Intl Airport-Lisbon flight deals on Cheapflights vs. Justfly.com >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 Justfly.com the most. Justfly.com 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 2 inbound flights from Washington, D.C. Dulles Intl per day from 12 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.

$255+ 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

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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 83 days in advance, depart on a Monday or Tuesday and return on a Sunday

Cheap flight deals from Dulles Intl to Lisbon

Most accurate provider	Justfly.com 3 stars
Most trusted provider	Justfly.com 3 stars
Round-trip from	$544 (FlightHub)
One-way from	$255 (Kiwi.com)
Popular in	June
Cheapest in	January
Average price	$663
Good round-trip deal	$545 or less
Good one-way deal	$377 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.

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

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

Search Deals

Highest demand for flights based on searches. 16% potential increase in price ($182 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).

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Average for round-trip flights in January 2026

Search Deals

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

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

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Find flight deals from Dulles Intl to Lisbon

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 January 8, 2026.

Tue 4/145:05 pmIAD - LIS

Nonstop7h 25mTAP AIR PORTUGAL

Wed 4/225:15 pmLIS - IAD

Nonstop8h 20mTAP AIR PORTUGAL

Deal found 1/7

$544

Wed 2/187:52 pmIAD - LIS

2 stops38h 58mScandinavian Airlines

Wed 2/254:55 pmLIS - IAD

1 stop29h 20mScandinavian Airlines

Deal found 1/7

$545

Fri 4/248:20 pmIAD - LIS

1 stop14h 15mScandinavian Airlines

Fri 5/812:45 pmLIS - IAD

2 stops35h 31mScandinavian Airlines

Deal found 1/6

$546

Tue 2/312:23 pmIAD - LIS

2 stops22h 42mScandinavian Airlines

Fri 2/64:40 pmLIS - IAD

1 stop31h 10mScandinavian Airlines

Deal found 1/6

$547

Mon 1/265:30 pmIAD - LIS

Nonstop7h 05mTAP AIR PORTUGAL

Tue 2/310:45 amLIS - IAD

Nonstop8h 50mTAP AIR PORTUGAL

Deal found 1/6

$550

Sat 1/318:30 pmIAD - LIS

1 stop14h 35mScandinavian Airlines

Fri 2/66:55 amLIS - IAD

2 stops17h 14mScandinavian Airlines

Deal found 1/6

$552

Sat 2/78:30 pmIAD - LIS

1 stop14h 35mMultiple Airlines

Mon 2/96:45 amLIS - IAD

1 stop15h 30mMultiple Airlines

Deal found 1/7

$553

Thu 2/268:30 pmIAD - LIS

1 stop14h 20mMultiple Airlines

Fri 3/66:55 amLIS - IAD

2 stops17h 14mMultiple Airlines

Deal found 1/7

$555

Thu 1/298:30 pmIAD - LIS

1 stop14h 20mScandinavian Airlines

Thu 2/51:00 pmLIS - IAD

2 stops58h 50mScandinavian Airlines

Deal found 1/7

$556

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 January 8, 2026.

Thu 2/268:30 pmIAD - LIS

1 stop14h 20mScandinavian Airlines

Mon 3/25:20 pmLIS - IAD

2 stops47h 24mScandinavian Airlines

Deal found 1/6

$563

Mon 5/49:00 pmIAD - LIS

1 stop15h 40mRoyal Air Maroc

Mon 5/1112:50 pmLIS - IAD

1 stop11h 10mRoyal Air Maroc

Deal found 1/6

$569

Thu 1/298:30 pmIAD - LIS

2 stops18h 25mMultiple Airlines

Thu 2/56:55 pmLIS - IAD

2 stops29h 14mMultiple Airlines

Deal found 1/6

$660

Tue 3/248:32 amIAD - LIS

2 stops20h 48mUnited Airlines

Tue 3/3111:25 amLIS - IAD

2 stops33h 38mUnited Airlines

Deal found 1/6

$790

Fri 4/108:20 pmIAD - LIS

1 stop14h 15mScandinavian Airlines

Fri 4/1712:45 pmLIS - IAD

2 stops33h 05mScandinavian Airlines

Deal found 1/6

$602

Fri 5/88:20 pmIAD - LIS

1 stop14h 15mMultiple Airlines

Tue 5/122:35 pmLIS - IAD

2 stops31h 15mMultiple Airlines

Deal found 1/6

$669

Tue 3/171:19 pmIAD - LIS

2 stops22h 21mMultiple Airlines

Tue 3/246:10 pmLIS - IAD

2 stops28h 05mMultiple Airlines

Deal found 1/6

$685

Wed 4/85:10 pmIAD - LIS

2 stops15h 30mUnited Airlines

Wed 4/1511:25 amLIS - IAD

2 stops29h 23mUnited Airlines

Deal found 1/6

$794

Thu 2/128:30 pmIAD - LIS

2 stops20h 20mMultiple Airlines

Tue 2/1712:45 pmLIS - IAD

2 stops33h 30mMultiple Airlines

Deal found 1/6

$690

Wed 4/225:41 pmIAD - LIS

1 stop9h 39mUnited Airlines

Wed 4/2912:20 pmLIS - IAD

Nonstop8h 05mUnited Airlines

Deal found 1/7

$796

Wed 4/11:19 pmIAD - LIS

2 stops21h 41mMultiple Airlines

Fri 4/1012:45 pmLIS - IAD

2 stops33h 05mMultiple Airlines

Deal found 1/7

$761

Last-minute flights from Dulles Intl to Lisbon
Discover last-minute flight deals from Dulles Intl to Lisbon. Data last updated January 8, 2026 and is based on user searches.

Mon 1/265:30 pmIAD - LIS

Nonstop7h 05mTAP AIR PORTUGAL

Tue 2/310:45 amLIS - IAD

Nonstop8h 50mTAP AIR PORTUGAL

Deal found 1/6

$550

Thu 1/298:30 pmIAD - LIS

1 stop14h 20mScandinavian Airlines

Thu 2/51:00 pmLIS - IAD

2 stops58h 50mScandinavian Airlines

Deal found 1/7

$556

Sat 1/318:30 pmIAD - LIS

1 stop14h 35mScandinavian Airlines

Fri 2/66:55 amLIS - IAD

2 stops17h 14mScandinavian Airlines

Deal found 1/6

$552

Tue 2/312:23 pmIAD - LIS

2 stops22h 42mScandinavian Airlines

Fri 2/64:40 pmLIS - IAD

1 stop31h 10mScandinavian Airlines

Deal found 1/6

$547

Tue 2/35:30 pmIAD - LIS

Nonstop7h 05mTAP AIR PORTUGAL

Thu 2/1211:25 amLIS - IAD

Nonstop8h 50mTAP AIR PORTUGAL

Deal found 1/7

$548

Thu 2/55:30 pmIAD - LIS

Nonstop7h 05mTAP AIR PORTUGAL

Sat 2/1411:25 amLIS - IAD

Nonstop8h 50mTAP AIR PORTUGAL

Deal found 1/7

$544

Sat 2/78:30 pmIAD - LIS

1 stop14h 35mMultiple Airlines

Mon 2/96:45 amLIS - IAD

1 stop15h 30mMultiple Airlines

Deal found 1/7

$553

Wed 2/187:52 pmIAD - LIS

2 stops38h 58mScandinavian Airlines

Wed 2/254:55 pmLIS - IAD

1 stop29h 20mScandinavian Airlines

Deal found 1/7

$545

Thu 2/198:30 pmIAD - LIS

1 stop14h 20mScandinavian Airlines

Mon 3/25:20 pmLIS - IAD

2 stops47h 24mScandinavian Airlines

Deal found 1/7

$558

Tue 2/245:05 pmIAD - LIS

1 stop15h 00mMultiple Airlines

Wed 3/46:40 amLIS - IAD

1 stop17h 50mMultiple Airlines

Deal found 1/6

$546

Thu 2/268:30 pmIAD - LIS

1 stop14h 20mMultiple Airlines

Fri 3/66:55 amLIS - IAD

2 stops17h 14mMultiple Airlines

Deal found 1/7

$555

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 January 8, 2026.

Mon 3/27:05 pmIAD - LIS

2 stops42h 05mMultiple Airlines

Deal found 1/5

$255

Tue 3/176:05 pmIAD - LIS

2 stops24h 30mMultiple Airlines

Deal found 1/7

$261

Mon 3/1610:45 pmIAD - LIS

2 stops43h 50mMultiple Airlines

Deal found 1/7

$274

Mon 1/195:05 pmIAD - LIS

1 stop15h 10mMultiple Airlines

Deal found 1/7

$281

Mon 2/21:31 pmIAD - LIS

2 stops26h 04mMultiple Airlines

Deal found 1/7

$286

Tue 1/275:05 pmIAD - LIS

1 stop15h 00mMultiple Airlines

Deal found 1/6

$288

Sat 2/77:40 pmIAD - LIS

3 stops40h 45mMultiple Airlines

Deal found 1/7

$291

Fri 1/307:40 pmIAD - LIS

3 stops19h 45mMultiple Airlines

Deal found 1/7

$292

Mon 2/91:31 pmIAD - LIS

2 stops23h 54mMultiple Airlines

Deal found 1/7

$293

Wed 3/187:50 pmIAD - LIS

2 stops19h 40mMultiple Airlines

Deal found 1/7

$296

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

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Thu 2/26

8:30 pm-3:50 pm

1 stop14h 20m

Lisbon Humberto Delgado

Mon 3/2

5:20 pm-11:44 am

2 stops47h 24m

$563

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Mon 5/4

9:00 pm-5:40 pm

1 stop15h 40m

Lisbon Humberto Delgado

Mon 5/11

12:50 pm-7:00 pm

1 stop11h 10m

$569

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Fri 4/10

8:20 pm-3:35 pm

1 stop14h 15m

Lisbon Humberto Delgado

Fri 4/17

12:45 pm-4:50 pm

2 stops33h 05m

$602

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Thu 1/29

8:30 pm-7:55 pm

2 stops18h 25m

Lisbon Humberto Delgado

Thu 2/5

6:55 pm-7:09 pm

2 stops29h 14m

$660

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Fri 5/8

8:20 pm-3:35 pm

1 stop14h 15m

Lisbon Humberto Delgado

Tue 5/12

2:35 pm-4:50 pm

2 stops31h 15m

$669

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Tue 3/17

1:19 pm-3:40 pm

2 stops22h 21m

Lisbon Humberto Delgado

Tue 3/24

6:10 pm-6:15 pm

2 stops28h 05m

$685

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Thu 2/12

8:30 pm-9:50 pm

2 stops20h 20m

Lisbon Humberto Delgado

Tue 2/17

12:45 pm-5:15 pm

2 stops33h 30m

$690

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 4/1

1:19 pm-4:00 pm

2 stops21h 41m

Lisbon Humberto Delgado

Fri 4/10

12:45 pm-4:50 pm

2 stops33h 05m

$761

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Tue 3/24

8:32 am-9:20 am

2 stops20h 48m

Lisbon Humberto Delgado

Tue 3/31

11:25 am-4:03 pm

2 stops33h 38m

$790

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 4/8

5:10 pm-1:40 pm

2 stops15h 30m

Lisbon Humberto Delgado

Wed 4/15

11:25 am-11:48 am

2 stops29h 23m

$794

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 22 results

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 January.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
Ovago	Price Accuracy2 stars	Trust Score*2 stars
Justfly.com	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 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 Washington, D.C. Dulles Intl Airport-Lisbon flights, users find the pricing of Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Washington, D.C. Dulles Intl Airport-Lisbon flight deals on Cheapflights vs. Justfly.com >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 Justfly.com the most. Justfly.com 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.

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 83 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, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Lisbon (average of $345). Flying from Washington, D.C. Dulles Intl Airport to Lisbon in March is currently the most expensive (average of $549). 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.

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

Airports

IAD

For evening departures, expect the check-in area to be crowded. Arrive early to navigate the bustling terminal efficiently.

LIS

Upon arrival at LIS, use the metro line for a quick 20-minute trip to downtown Lisbon from Terminal 1.

Our travel experts

Ramsey Qubein

Expert on LIS and IAD

Reviews of airlines servicing Lisbon

See what other customers who have flown with United Airlines, Turkish Airlines, and TAP 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.

United Airlines

7.4

Good

9,141 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

United Airlines

7.4

Good

9,141 reviews

United Airlines

7.4

Good

9,141 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Turkish Airlines

7.3

Good

4,153 reviews

United Airlines

7.4

Good

9,141 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

TAP AIR PORTUGAL

7.1

Good

2,111 reviews

United Airlines

7.4

Good

9,141 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Lufthansa

6.8

Okay

7,696 reviews

United Airlines

7.4

Good

9,141 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Royal Air Maroc

6.2

Okay

556 reviews

United Airlines

7.4

Good

9,141 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

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 2 inbound flights from Washington, D.C. Dulles Intl per day from 12 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 14h 20m. 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 $444. Other airlines that can offer you cheap pricing are British Airways, from $480, and Scandinavian Airlines, from $481. TAP AIR PORTUGAL 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 TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $336. However, be on the lookout for offers from Royal Air Maroc and Scandinavian Airlines, 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 Air Canada (76%), United Airlines (76%) and Lufthansa (76%).
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 $271. On average you can expect to pay $1,486. The most popular route, (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), can usually be booked for $472.
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, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Lisbon (average of $345). Flying from Washington, D.C. Dulles Intl Airport to Lisbon in March is currently the most expensive (average of $549). 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 10 airlines flying from Dulles Intl to Lisbon

Airline	Cheapest	Average	Flexibility	On-time
Scandinavian Airlines	Cheapest$481	Average$599	FlexibilityNo cancel fee	On-time77%
American Airlines	Cheapest$508	Average$646	FlexibilityNo cancel fee	On-time71%
TAP AIR PORTUGAL	Cheapest$509	Average$888	FlexibilityNo cancel fee	On-timeN/A
British Airways	Cheapest$510	Average$692	FlexibilityNo cancel fee	On-time70%
Royal Air Maroc	Cheapest$551	Average$678	FlexibilityNo cancel fee	On-time75%
Turkish Airlines	Cheapest$585	Average$664	FlexibilityNo cancel fee	On-time77%
Iberia	Cheapest$592	Average$799	FlexibilityNo cancel fee	On-time77%
Delta	Cheapest$615	Average$816	FlexibilityNo cancel fee	On-timeN/A
Aer Lingus	Cheapest$666	Average$1,116	FlexibilityNo cancel fee	On-timeN/A
JetBlue	Cheapest$707	Average$1,148	FlexibilityNo cancel fee	On-time62%

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$255+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.

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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 January 8, 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 January 8, 2026.

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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.

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

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

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?

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

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

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

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

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

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

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

Airports

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LIS

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Reviews of airlines servicing Lisbon

See what other customers who have flown with United Airlines, Turkish Airlines, and TAP 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

Find useful and relevant information for your journey from Dulles Intl to Lisbon. 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 into for flights to Lisbon from Washington, D.C. Dulles Intl?

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

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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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Top 10 airlines flying from Dulles Intl to Lisbon

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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 January 8, 2026.