LIS - IAD

$514 Find Cheap Flights from Lisbon to Washington, D.C.

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 9/21. 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

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Expert advice
Booking Insights
Flight Deals

Cheap Flights from Lisbon to Washington, D.C. (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 Washington, D.C. 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

Thu, Oct 9 - Thu, Oct 23
United Airlines Logo
5:05 am - 1:30 pmLIS-IAD
13h 25m1 stop
United Airlines Logo
9:35 am - 9:20 amIAD-LIS
18h 45m1 stop
$539United Airlines
Find Deal
Fri, Sep 5 - Sun, Sep 14
 Logo
7:30 am - 3:50 pmLIS-IAD
13h 20m1 stop
 Logo
8:45 pm - 11:20 pmIAD-LIS
21h 35m1 stop
Thu, Sep 11 - Sat, Sep 27
 Logo
5:05 am - 1:30 pmLIS-IAD
13h 25m1 stop
 Logo
8:45 pm - 11:20 pmIAD-LIS
21h 35m1 stop
Thu, Sep 11 - Sat, Sep 27
SWISS Logo
5:55 am - 3:25 pmLIS-IAD
14h 30m1 stop
SWISS Logo
8:45 pm - 11:20 pmIAD-LIS
21h 35m1 stop
$550SWISS
Find Deal
Thu, Sep 11 - Sat, Sep 27
SWISS Logo
5:55 am - 3:25 pmLIS-IAD
14h 30m1 stop
SWISS Logo
8:45 pm - 11:20 pmIAD-LIS
21h 35m1 stop
$551SWISS
Find Deal
Thu, Sep 11 - Sat, Sep 27
Lufthansa Logo
5:05 am - 1:30 pmLIS-IAD
13h 25m1 stop
Lufthansa Logo
10:20 pm - 10:35 amIAD-LIS
7h 15mnonstop
$561Lufthansa
Find Deal
Thu, Sep 11 - Sat, Sep 27
Lufthansa Logo
5:05 am - 1:30 pmLIS-IAD
13h 25m1 stop
Lufthansa Logo
10:20 pm - 10:35 amIAD-LIS
7h 15mnonstop
$562Lufthansa
Find Deal
Thu, Oct 9 - Thu, Oct 23
American Airlines Logo
8:25 am - 3:00 pmLIS-IAD
11h 35m1 stop
American Airlines Logo
9:24 am - 9:05 amIAD-LIS
18h 41m2 stops
$573American Airlines
Find Deal
Thu, Aug 28 - Sat, Sep 13
TAP AIR PORTUGAL Logo
12:00 pm - 3:20 pmLIS-IAD
8h 20mnonstop
TAP AIR PORTUGAL Logo
10:35 pm - 10:55 amIAD-LIS
7h 20mnonstop
$612TAP AIR PORTUGAL
Find Deal
Tue, Sep 30 - Tue, Oct 7
TAP AIR PORTUGAL Logo
12:00 pm - 3:20 pmLIS-IAD
8h 20mnonstop
TAP AIR PORTUGAL Logo
10:20 pm - 10:40 amIAD-LIS
7h 20mnonstop
$676TAP AIR PORTUGAL
Find Deal
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
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?

What’s the cheapest day of the week to fly from Lisbon to Washington, D.C.?

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, D.C., Sunday is the cheapest day to fly on average and Monday is the most expensive. Flying from Washington, D.C. 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 $601 (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 $773 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 $1,552 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 3 weeks before departure, which saves you about 56% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$514
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Lisbon to Washington, D.C.

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, D.C. 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 $514 for a one-way ticket and $539 for a round-trip.

  • Do I need a passport to fly between Lisbon and Washington, D.C.?

    A passport is required to fly from Lisbon to Washington, D.C..

  • Which airlines offer Wi-Fi service onboard planes from Lisbon to Washington, D.C.?

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

  • Which aircraft models fly most regularly from Lisbon to Washington, D.C.?

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

  • Which airline alliances offer flights from Lisbon to Washington, D.C.?

    Star Alliance is the only airline alliance operating flights between Lisbon and Washington, D.C..

  • On which days can I fly direct from Lisbon to Washington, D.C.?

    There are nonstop flights from Lisbon to Washington, D.C. 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 $635 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 $724 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Lisbon to Washington, D.C.?

    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, D.C..

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. 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, D.C.?

    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, D.C. 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, D.C.?

    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, D.C. 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 $689 or less one-way and $727 or less round-trip.

Prefer to fly direct from Lisbon to Washington, D.C.?

 
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

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

Tuesday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

Wednesday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

Thursday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

Friday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

Saturday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

Sunday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

See more direct flights

Direct returns

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

Monday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

Tuesday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

Wednesday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

Thursday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

Friday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

Saturday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

Sunday

Air Canada, JetBlue, Lufthansa, +2 more

Air Canada, JetBlue, +3 more

See more direct flights

Reviews of the top 3 airlines serving 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 8925 reviews
7.3Comfort
7.1Entertainment
7.7Boarding
8.1Crew
6.6Food
Airline reviews

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.

10.0 ExcellentAnonymous, Aug 2025TPA - IAD
Read more United Airlines reviews

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

United airlines, mediocre at best. No issues , nothing great . Worked for me

Turbulent taking off & landing to Dulles from Raleigh. Flight from Dulles to Tokyo very good!!

Very nice and clean plane. Transit time between flights was tight though

Mostly the experience was good except for the flight changes made by UA which meant longer layover in DC

Terrible. First of all we were delayed 4 3/4 hours departing Honolulu. As we had to leave our condo and the rental car had to be returned we had to go to the airport. Even though we had a business class boarding pass to Washington, since we did not have business class to Montreal we could not access the lounge without paying a $59 fee each. This does not make sense to us. Since we could not meet our original connection United booked us to Montreal via New York LaGuardia on Air Canada. In Washington a further delay got us into LaGuardia too late to make our connection to Montreal so we were booked on another Air Canada flight 3 hours later. We were originally scheduled to arrive in Montreal at 10:40 and arrived at 19:55. A totally exhausting day, United did not offer a meal voucher or any type of compensation. Air Canada did give us a digital meal voucher. The food in United business class is poor among all meals offered. The pods look nice but are not that confortable. Overall would not fly on United again.

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.

The airport temperature at the airport and on the flight was too warm

Flight being delayed for 35 minutes had me lose the connection to my transport

Was the best airplane ✈️ ever that I never see I will traveling again again with u guys.

Flight was delayed on 6/20 to miss international connection. Next flight out was 24 hours later. Not acceptable.

Flight from FNC to OBO was cancelled. We were rebooked to Lisbon later in the day. It was inconvenient but it worked out ok in the end.

Terrible flight attendant attitude. Average 3-star hotel employee has better hospitality skills. Business class seats are literally a joke. TAP executives should ride business class in other airlines to develop some rudimentary sense of what business class is.

They don’t give information on why a flight is delayed in a timely manner. Very frustrating.

The flight was ok but chargers did not work and the speakers in the back of the cabin did not either. But I am writing because the crew was really, really rude and not only rude but had the curtains always closed, forgot to clear our trays, the bathrooms were filthy and trash was building out, and one of the attendants even had her EARBUDS on while in the cabin. From movement it seemed like she was listening to music, so not even the safety aspect was there. My neighbor s English is not good and they were very dismissive of her. when we deplaned the crew in the back was just chatting with one another and the first class attendant was briefly and said goodnight. It is nice that a crew gets along so well, but they did not take care of passengers at all. They rushed through all the services and otherwise did not go through the cabin to offer water or anything else. i had the feeling of being unwelcome at a party. I am not a grumpy traveller but I thought you really needed to know. Thank you, Carin

Food was terrible. They ran out of options and gave me a bland undercooked pasta and veggies. Only middle seat was available to select although I paid extra. Baggage delayed at destination. Flight attendants not really helpful.

Flight was late arriving. So, we left 25 min late. Pilot made some time up during the flight. Therefore, we arrived alittle past original time.

Crew was great. But my flight was late arriving and as a result, I missed my connecting flight to Richmond. I had to catch a later flight. On a positive note, the attendants at the counter were extremely helpful in booking my later flight. They book my on the next flight to Richmond.

If the plain wait for the passenger it should wait for the baggage!!

The plane (Mitsubishi CRJ) felt old, creaking and not very new. The crew was okay. Hot water provision was broken so hot beverages could't be served.

One one boarding scanner was working to scan 400+ passengers to an Airbus 380. Food in premium economy was mediocre.

Liked the flight being almost on time (airport issues created a delay). Disliked the issue printing tag bags on the kiosk and having to wait for an hour on like to drop my bags.

Our flight was delayed for over an hour due to weather, and it had already been a long travel day. However, the crew was calm and compassionate, listening to every complaint with genuine concern. They got us home safely without incident, in spite of all of the obstacles. I’m grateful.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.