LIS - IAD

$422 Find Cheap Flights from Lisbon to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Lisbon to Dulles Intl departing on 2/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Lisbon to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Lisbon to Washington, D.C., as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$460
Typical prices: $542-$802
Scandinavian Airlines
Sun 1/25Thu 1/29
LIS - IAD • 1 stop
Cheapest non-stop
$558
Typical prices: $551-$773
TAP AIR PORTUGAL
Thu 12/4Tue 12/9
LIS - IAD • Non-stop
Our travelers' advice
AI-generated summary based on content written by travel experts
TAP's A330neo offers 2-4-2 seating for privacy.
Upon arrival at IAD, use the Silver Line Metro to D.C.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Scandinavian Airlines
Cheapest • from $460 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
5 weeks
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 28% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 17% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Dulles Intl!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Lisbon to Dulles Intl (LIS-IAD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Lisbon to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Lisbon to Dulles Intl

Sun, Jan 25 - Thu, Jan 29
Scandinavian Airlines Logo
4:55 pm - 3:20 pmLIS-IAD
27h 25m1 stop
Scandinavian Airlines Logo
8:30 pm - 3:50 pmIAD-LIS
14h 20m1 stop
$460Scandinavian Airlines
Find Deal
Sun, Feb 1 - Thu, Feb 26
Scandinavian Airlines Logo
4:55 pm - 5:15 pmLIS-IAD
29h 20m1 stop
Scandinavian Airlines Logo
8:30 pm - 4:05 pmIAD-LIS
14h 35m1 stop
$514Scandinavian Airlines
Find Deal
Thu, Dec 4 - Tue, Dec 9
TAP AIR PORTUGAL Logo
11:25 am - 3:15 pmLIS-IAD
8h 50mnonstop
TAP AIR PORTUGAL Logo
5:30 pm - 5:35 amIAD-LIS
7h 05mnonstop
$558TAP AIR PORTUGAL
Find Deal
Sun, Nov 9 - Mon, Nov 24
Delta Logo
5:00 am - 4:05 pmLIS-IAD
16h 05m1 stop
Delta Logo
6:50 pm - 11:20 amIAD-LIS
11h 30m1 stop
$578Delta
Find Deal
Thu, Jan 15 - Tue, Jan 20
Delta Logo
5:00 am - 4:05 pmLIS-IAD
16h 05m1 stop
Delta Logo
7:49 pm - 3:10 pmIAD-LIS
14h 21m2 stops
$579Delta
Find Deal
Sun, Feb 1 - Thu, Feb 26
Lufthansa Logo
5:00 am - 3:50 pmLIS-IAD
15h 50m1 stop
Lufthansa Logo
10:05 pm - 10:15 amIAD-LIS
7h 10mnonstop
$582Lufthansa
Find Deal
Fri, Nov 21 - Thu, Dec 4
Lufthansa Logo
5:00 am - 3:50 pmLIS-IAD
15h 50m1 stop
Lufthansa Logo
10:55 pm - 11:30 pmIAD-LIS
19h 35m1 stop
$589Lufthansa
Find Deal
Fri, Nov 21 - Thu, Dec 4
United Airlines Logo
5:00 am - 2:35 pmLIS-IAD
14h 35m1 stop
United Airlines Logo
5:19 pm - 8:10 amIAD-LIS
9h 51m1 stop
$592United Airlines
Find Deal
Tue, Nov 18 - Mon, Dec 8
United Airlines Logo
5:00 am - 3:50 pmLIS-IAD
15h 50m1 stop
United Airlines Logo
10:55 pm - 11:30 pmIAD-LIS
19h 35m1 stop
$596United Airlines
Find Deal
Thu, Dec 25 - Mon, Dec 29
TAP AIR PORTUGAL Logo
11:25 am - 3:15 pmLIS-IAD
8h 50mnonstop
TAP AIR PORTUGAL Logo
5:30 pm - 5:35 amIAD-LIS
7h 05mnonstop
$624TAP AIR PORTUGAL
Find Deal
Booking Insights

KAYAK's insights & trends for Lisbon to Dulles Intl flights

Get data-powered insights and trends into flights from Lisbon to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Lisbon to Washington, D.C. Dulles Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Lisbon to Washington, D.C. Dulles Intl Airport departing in January.

What’s the cheapest day of the week to fly from Lisbon to Washington Dulles Airport?

The average price of all round-trip flights from Lisbon to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.

For Lisbon to Washington Dulles Airport, Sunday is the cheapest day to fly on average and Monday is the most expensive. Flying from Washington Dulles Airport back to Lisbon, the best deals are generally found on Monday, with Friday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Lisbon to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Lisbon to Washington, D.C. Dulles Intl Airport is March, where tickets cost $606 (return) on average. On the other hand, the most expensive months are July and October, where the average cost of round-trip tickets is $998 and $975 respectively.

Can I save money by flying with a layover from Lisbon to Washington, D.C. Dulles Intl Airport?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $736 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Lisbon to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Lisbon to Washington, D.C. Dulles Intl Airport, you should book around 5 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Expert advice

Expert advice for your flight from Lisbon to Dulles Intl

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
TAP AIR PORTUGAL

TAP's A330neo offers 2-4-2 seating for extra privacy in economy class.


TAP's Atlântico Premium Lounge offers a relaxing space after security for transatlantic travelers.

United Airlines

United Polaris offers lie-flat seats with aisle access on long-haul flights.


United's Premium Plus cabin provides extra recline and legroom on long-haul flights.

Airports
LIS

For departures from LIS, arrive early due to long security and passport control lines, especially for Non-Schengen flights.

Read more about LISby Duncan Madden
IAD

Upon arrival at IAD, use the Silver Line Metro for a convenient 50-minute ride to downtown D.C.

Read more about IADby Stefanie Waldek
Our travel experts
Duncan Madden

Duncan Madden

Expert on TAP AIR PORTUGAL and LIS

Duncan Madden

Duncan Madden

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines and IAD

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more

Good to know

Low seasonFebruary
Cheapest flight$422
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from Lisbon to Washington Dulles Airport

When to book flights from Lisbon to Dulles Intl

Are your dates flexible? Find out the best times to travel from Lisbon to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Lisbon to Washington Dulles Airport flights

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

    In the last 3 days, the lowest price for a flight from Lisbon to Washington, D.C. Dulles Intl Airport was $422 for a one-way ticket and $460 for a round-trip.

  • Do I need a passport to fly between Lisbon and Washington Dulles Airport?

    A passport is required to fly from Lisbon to Washington Dulles Airport.

  • Which airlines offer Wi-Fi service onboard planes from Lisbon to Washington Dulles Airport?

    Air France, Virgin Atlantic, and Delta offer inflight Wi-Fi service on the Lisbon to Washington Dulles Airport flight route.

  • Which aircraft models fly most regularly from Lisbon to Washington Dulles Airport?

    The Boeing 767-400 is the aircraft model that flies most regularly on the Lisbon to Washington Dulles Airport flight route.

  • Which airline alliances offer flights from Lisbon to Washington Dulles Airport?

    Star Alliance is the only airline alliance operating flights between Lisbon and Washington Dulles Airport.

  • On which days can I fly direct from Lisbon to Washington Dulles Airport?

    There are nonstop flights from Lisbon to Washington Dulles Airport on a daily basis.

  • Which is the best airline for flights from Lisbon to Washington, D.C., United Airlines or TAP AIR PORTUGAL?

    The two airlines most popular with KAYAK users for flights from Lisbon to Washington, D.C. are United Airlines and TAP AIR PORTUGAL. With an average price for the route of $701 and an overall rating of 7.4, United Airlines is the most popular choice. TAP AIR PORTUGAL is also a great choice for the route, with an average price of $721 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Lisbon to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Lisbon to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Lisbon to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Lisbon is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Lisbon to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Lisbon with another airline. Booking your flights between Lisbon and IAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Lisbon to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Lisbon up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Lisbon to Washington, D.C. Dulles Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $831 or less one-way and $799 or less round-trip.

Prefer to fly direct from Lisbon to Washington Dulles Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Lisbon Humberto Delgado to Washington, D.C. Dulles Intl.
Find which airlines fly direct from Lisbon Humberto Delgado Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

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

Monday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

Tuesday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

Wednesday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

Thursday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

Friday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

Saturday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

Sunday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

See more direct flights

Direct returns

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

Monday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

Tuesday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

Wednesday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

Thursday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

Friday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

Saturday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

Sunday

TAP AIR PORTUGAL, United Airlines

TAP AIR PORTUGAL, United Airlines

See more direct flights

Reviews of the top airlines flying from Lisbon to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from Lisbon to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Lisbon to Dulles Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8998 reviews
7.7Boarding
7.1Entertainment
8.1Crew
7.3Comfort
6.6Food
Airline reviews

Crew was dismissive. Snacks and refills not offered. Poor business class experience. Bed not comfortable compared to Emirates or BA.

6.0 GoodMr, Oct 2025CPT - IAD
Read more United Airlines reviews

Crew was dismissive. Snacks and refills not offered. Poor business class experience. Bed not comfortable compared to Emirates or BA.

Flight was delayed for 5 hours because crew didn’t have enough time to rest - this seems like it could have been avoided with better scheduling. Food was not good.

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

This is the best united airlines flight that I took. The crew was very friendly and the food was tasty!

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

Had one staff that was not pleasant. Seems they are stressed with too many people to care for.

I would have liked an opportunity to move to a different seat ( even would have checked in my hand luggage)as I had health issues where I didn't have to clamber over the passenger next to me to for toilet use/ movement [ She was a highly unpleasant neighbor to sit next to]. In addition, I found that my European phone plan had run out of data and so I was not receiving emails from yourselves on airport wifi to be able to check in online and verifications difficult as did not accept the ticket number I had. I asked for an extra blanket but was told there was none. Then I saw other passengers receiving them. I couldn't eat the food and asked for snacks : Stewardess said " on the way" but they did not bring. The best bit was the check in process in Lisbon. Very efficient. However, I did not understand why we had to collect our bags at Washington then go through customs again. It was not explained. I also with my leg and health issue had approximately mile walk to the gate ( which then changed) . There appeared to be no moving walkways or help provided.

The attendant were friendly. I suggest you have a medical attendant on board every flight so that in case someone is sick , he/she will help them.

We had a very long diversion and our food voucher didn’t work because the restaurants were closed

Did not enjoy the meal provided. The aircraft was dirty. For instance, the screen seemed to have been cleaned with a dirty rag. Disgusting.

The person at the checkin was very helpful. We couldn’t check in through the keyosk, but the agent was very helpful.

Great price for really nice seats and the plane and staff were great, only 5-10 minute delays!

Tap was very frustrating in Lisbon. Not enough direction and help. Mixed messages of where we needed to go. Seats were not very comfortable.

Everything went as expected. Luggage arrived at my same destination and nothing disturbed my vacation.

This flight arrived late. We joined well over a thousand of other people waiting to go through customs. Air Portugal has lost my bag. We had to chase down a representative even though we had waited at the baggage claim for well over 1 hour and 35 minutes for baggage to come. No representative was there to explain the delay or to give any direction. After 1 hour and 35 minutes at least four passengers had no baggage to pick up or had a fraction of their baggage. The representative was a young woman who clearly did not have the experience to deal with what was happening. Very disappointing as of course we were dealing with great amount of jet lag and having been up for 24 hours at that point and not being able to have any of the things necessary at home that were contained in the bag was quite upsetting. That instant occurred last night at approximately 11:15 p.m. and as of 12:30 p.m. the next day I have not heard anything from Air Portugal.

Check-in guidance for transfer flight, boarding, in-flight service, seat comfort, etc.

Very rude person at the boarding desk; flight attendant coughing 3 inches from my face three times- not even covering her mouth; boarding process very unacceptable for older people with stairs to all planes (are you all stuck in the 1960’s?). I am sure that I am not remembering all of the negative things, but I am sure you get the message!

Flight was fine. Second meal ( fish sandwich on hard roll) was awful. My suitcase didn’t make the flight. It had been located, but won’t be delivered until tomorrow. Five days after flight

Boarding experience was awful. TAP claims I did not have check in luggage with tickets. I went 3-4 check in agents until I finally found a helpful kind agent who checked in my luggage with no fees. On top of that our flight was over 2 hours delayed with barely an apology or explanation.

Everything you need to know for your flight from Lisbon to Dulles Intl

Information on your arrival and departure airports

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