LIS - IAD

$572 Find Cheap Flights from Lisbon to Washington, D.C. - Compare and Save

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 8/26. 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

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Everything you should know

Cheapest round-trip
$598
Typical prices: $598-$995
Multiple Airlines
Fri 11/6Fri 11/20
LIS - IAD • 1 stop
Cheapest non-stop
$616
Typical prices: $746-$1,032
TAP AIR PORTUGAL
Thu 10/29Mon 11/2
LIS - IAD • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
TAP’s A330neo has 2-4-2 economy seating, offering more privacy on this route.
United Premium Plus adds extra legroom and recline for the long-haul to Washington.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $599 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
You can fly direct with TAP AIR PORTUGAL and United Airlines. Average duration is 8h 16m
Direct flights
Direct flights
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Direct flights
Direct flights
+1
Avoid delays
Most punctual • 75% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $496 (round-trip)
Shortest trip • 12h 20m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 29% price drop
Most popular
Good to know
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We hope you love your trip to Dulles Intl!
Flight Deals
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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

Fri, Nov 6 - Fri, Nov 20
Multiple Airlines Logo
7:05 am - 7:55 pm
LIS
-
IAD
17h 50m
1 stop
Multiple Airlines Logo
5:50 pm - 4:05 pm
IAD
-
LIS
17h 15m
1 stop
$598Multiple Airlines
Tue, Nov 3 - Wed, Dec 9
Icelandair Logo
2:00 pm - 6:30 pm
LIS
-
IAD
33h 30m
1 stop
Icelandair Logo
7:40 pm - 12:50 pm
IAD
-
LIS
12h 10m
1 stop
$599Icelandair
Thu, Oct 29 - Mon, Nov 2
TAP AIR PORTUGAL Logo
11:25 am - 4:15 pm
LIS
-
IAD
8h 50mnonstop
TAP AIR PORTUGAL Logo
5:25 pm - 5:35 am
IAD
-
LIS
7h 10mnonstop
$616TAP AIR PORTUGAL
Tue, Aug 25 - Mon, Aug 31
Multiple Airlines Logo
8:25 am - 6:50 pm
LIS
-
IAD
15h 25m
1 stop
Multiple Airlines Logo
8:30 pm - 6:55 pm
IAD
-
LIS
17h 25m
2 stops
$622Multiple Airlines
Thu, Aug 27 - Sat, Sep 5
Multiple Airlines Logo
8:25 am - 6:55 pm
LIS
-
IAD
15h 30m
1 stop
Multiple Airlines Logo
10:25 pm - 4:20 pm
IAD
-
LIS
12h 55m
1 stop
$629Multiple Airlines
Tue, Aug 25 - Mon, Aug 31
Multiple Airlines Logo
8:25 am - 6:50 pm
LIS
-
IAD
15h 25m
1 stop
Multiple Airlines Logo
5:45 pm - 11:10 pm
IAD
-
LIS
24h 25m
1 stop
$634Multiple Airlines
Thu, Oct 29 - Mon, Nov 2
Multiple Airlines Logo
6:30 am - 5:20 pm
LIS
-
IAD
14h 50m
1 stop
Multiple Airlines Logo
6:20 pm - 2:55 pm
IAD
-
LIS
15h 35m
1 stop
$635Multiple Airlines
Tue, Aug 25 - Sat, Sep 5
Multiple Airlines Logo
8:25 am - 6:50 pm
LIS
-
IAD
15h 25m
1 stop
Multiple Airlines Logo
10:25 pm - 6:05 pm
IAD
-
LIS
14h 40m
1 stop
$636Multiple Airlines
Thu, Aug 27 - Sat, Sep 5
Multiple Airlines Logo
8:25 am - 6:55 pm
LIS
-
IAD
15h 30m
1 stop
Multiple Airlines Logo
10:25 pm - 4:20 pm
IAD
-
LIS
12h 55m
1 stop
$640Multiple Airlines
Thu, Aug 27 - Sat, Sep 5
Multiple Airlines Logo
8:25 am - 6:55 pm
LIS
-
IAD
15h 30m
1 stop
Multiple Airlines Logo
10:25 pm - 4:20 pm
IAD
-
LIS
12h 55m
1 stop
$649Multiple Airlines
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 November.

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 December, where tickets cost $599 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is $1,298 and $973 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 $955 on average.

Expert advice

Expert advice for your flight from Lisbon to Dulles Intl

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Duncan Madden

Duncan Madden

Expert on TAP AIR PORTUGAL and LIS

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.

Stefanie Waldek

Stefanie Waldek

Expert on United Airlines and IAD

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.

Good to know

Low seasonJanuary
Cheapest flight$572
Best time to beat the crowds but there is an average 2% increase 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 5 days, the lowest price for a flight from Lisbon to Washington, D.C. Dulles Intl Airport was $572 for a one-way ticket and $598 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 aircraft models fly most regularly from Lisbon to Washington, D.C.?

    The Boeing 777 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 $881 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 $973 and an overall rating of 7.2.

  • 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 $652 or less one-way and $897 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

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 9927 reviews
7.3Comfort
7.1Entertainment
7.7Boarding
6.7Food
8.1Crew
Airline reviews

Horrible I am at almost 2,000,000 miles on United. This was probably the worst flight ever. An hour and a half before takeoff I get a message that they’re changing the plane and I no longer have a seat in Polaris business Supposedly, there was a problem with the plane, but then there was no other plane Finally, they decided to bring a plane from Newark to Washington Dulles Of course the original flight was at 10:45 PM so by the time the plane got there it was 12:30 AM. It had not been cleaned. It had not been catered. They don’t really have people available to do those things when it’s not pre-programmed at 1 o’clock in the morning. The crew had to be changed And the new plane held 28 fewer people than the scheduled plane There is no way you can hate United Airlines enough The people at the gate were actually just fine, but it was management who was completely useless And did they send extra help to the people at the gate? Did they send supervisors? Of course not. Just don’t take United find somebody else or buy a boat

2.0 MediocreAnonymous, Jun 2026
TPA - IAD
Read more United Airlines reviews

Horrible I am at almost 2,000,000 miles on United. This was probably the worst flight ever. An hour and a half before takeoff I get a message that they’re changing the plane and I no longer have a seat in Polaris business Supposedly, there was a problem with the plane, but then there was no other plane Finally, they decided to bring a plane from Newark to Washington Dulles Of course the original flight was at 10:45 PM so by the time the plane got there it was 12:30 AM. It had not been cleaned. It had not been catered. They don’t really have people available to do those things when it’s not pre-programmed at 1 o’clock in the morning. The crew had to be changed And the new plane held 28 fewer people than the scheduled plane There is no way you can hate United Airlines enough The people at the gate were actually just fine, but it was management who was completely useless And did they send extra help to the people at the gate? Did they send supervisors? Of course not. Just don’t take United find somebody else or buy a boat

Flight attendants were great. Food mediocre. Bamboo utensils not Great especially if you have to cut something. Seating a bit crowded.

The crew was the worst ive ever had in my life flying with United Airlines, letting another person move my bag without asking and then the staff saying would the floor be better after I kept begging saying dont move my bag it has fragile things inside. This incident truly makes me they favor other customers more and I dont want to worry about being on the tail end. Especially if they dont listen any input, no care for what I asked but accommodated those who are reckless and disturb others more...

Our flight was delayed 2.5 hours from Lisbon to DC so we missed our connection to Seattle that would have arrived at about 9 PM. The agent initially said we had to stay overnight in DC and there were no other options to put us on to get us to Seattle. While on board I discovered a flight via American he could have put us in but by the time we arrived in DC that was sold out. We were then put on a flight to San Francisco that was also delayed then arrived in San Francisco and our flight to Seattle was also delayed so we ended up not arriving until 2:15 am. Our son could not pick us up so we ended up having to pay over $100 to Uber home. This is the second trip with United that the flight has been delayed causing us to miss an evening in Las Vegas and we were given nothing.

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

There were no facilities in the middle of the aircraft and premium economy was not allowed to use the business class facilities, and had to share the only two toilets at the back with economy. The upgrade to Premium was definitely not worth it

Our flight to Rome, Italy was cancelled the day of and we were never informed. We only found out because I was trying to get into my husbands account and called to get his account number. Had to pay more for worse seating on another airline.

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.

United left one of our bags back in SFO but that’s not my real complaint. The complaint is how it all went down. So we checked in the day before online and were told we could use the quick drop for luggage. So the next day I used baggage quick drop curbside at SFO. The agent mistakenly didn't tag my bag as he put my bag on the conveyor belt untagged. We immediately alerted him he had not tagged the bag. I walked with him to the baggage service office to find my bag and tag it. We waited outside the office for 10 mins. He came out and said everything was ok and the bag was going to be tagged and on my flight. We received a text that one of our bags was on the flight but the other was not. I alerted my first class flight attendant immediately upon boarding the flight. She was helpful and said she’d get it sorted out right away. She called over the gate agent. The gate agent used my bag number and looked over information on her device. She said my bag was on the flight. The flight attendant was standing with her, looking at the device, and also said “yep it’s on the flight”. During the flight the flight attendant made reference to how reassuring it must feel knowing the bag was on the flight. Upon arriving to IAD we received a text that my bag was not on my flight. The text said my bag would arrive to my final destination LIS 24 hrs late. I understand that mistakes happen. I was totally ok with my bag mistakenly not getting tagged at the quick drop. I was fine with walking down to baggage services to tag my bag. But, what I am not ok with is that the United staff said they fixed the mistake two different times, assuring me twice that my bag would be/was on the plane…and it wasn’t. I expected better attention by the employees, for them to do what they said they were going to do. We also spent extra money to upgrade our seats to first class, including the entire return leg from Lisbon to San Francisco because we wanted a smoother and more relaxing travel experience. Our money was not well spent. We will not be using United for travel going forward.

One of the best flying experiences I’ve ever had.

Better leg room than expected in economy. Nice crew. Adequate bathrooms. Seat cushions a little thin, but recline well and have adjustable headrests. Best value. Liked having nonstop from ORD to Lisbon.

Excellent! Flight left a bit late but overall a pleasant experience.

On both flights, TAP Air Portugal messed up the seating choices that I paid for. They acknowledged that I had purchased seating, that they were errant in ensuring my choices, but told me nothing could be done about it. When I asked to be refunded, I was directed to "talk to someone from Air Portugal" Mon-Friday, and then I was dismissed. No help, no phone number provided to me. I was very annoyed both times and feel cheated.

Business class seats aren't comfortable. Food was not good.

Didn't make announcements during boarding, flight attendant seemed annoyed when I asked for water. Too many hours between flights. Confusing check in at the Lisbon airport.

Delayed at the beginning and the end and almost missed our connection

The cabin crew were curt, not with me, but observed with other passengers. They were unduly rude and it was unprovoked and when they realized they were wrong, they made no attempt to apologize for their own confusion.

I was disappointed of the crew, not friendly and attentive. Delay one way for fuel leakage and the plane is so hot. Not that great all around but I’m glad I experienced it so now know better.

Flight delayed by >1 hour. Long boarding involving riding a shuttle to the plane.

Packing people into a bus like sardines and then making them wait for at least 10-15 minutes before driving them to a location a mile away is not the way a national airline should represent itself. And it seems like everyone chosen for additional screening was a woman. What is up with that?

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

Information on your arrival and departure airports