LIS - IAD

$521 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 6/29. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$678
Typical prices: $910-$598
Royal Air Maroc
Sat 11/7Mon 11/9
LIS - IAD • 1 stop
Cheapest non-stop
$721
Typical prices: $1,118-$698
TAP AIR PORTUGAL
Tue 8/25Sat 9/19
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 $678 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with TAP AIR PORTUGAL and United Airlines. Average duration is 8h 16m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 73% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $496 (round-trip)
Shortest trip • 12h 16m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 28% price drop
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

Sat, Nov 7 - Mon, Nov 9
Royal Air Maroc Logo
5:55 pm - 6:45 pm
LIS
-
IAD
29h 50m
1 stop
Royal Air Maroc Logo
8:45 pm - 4:55 pm
IAD
-
LIS
15h 10m
1 stop
$678Royal Air Maroc
Sat, Nov 7 - Mon, Nov 9
Royal Air Maroc Logo
5:55 pm - 6:45 pm
LIS
-
IAD
29h 50m
1 stop
Royal Air Maroc Logo
8:45 pm - 4:55 pm
IAD
-
LIS
15h 10m
1 stop
$679Royal Air Maroc
Sat, Nov 7 - Mon, Nov 9
Royal Air Maroc Logo
5:55 pm - 6:45 pm
LIS
-
IAD
29h 50m
1 stop
Royal Air Maroc Logo
8:45 pm - 4:55 pm
IAD
-
LIS
15h 10m
1 stop
$680Royal Air Maroc
Sat, Nov 7 - Mon, Nov 9
Royal Air Maroc Logo
5:55 pm - 6:45 pm
LIS
-
IAD
29h 50m
1 stop
Royal Air Maroc Logo
8:45 pm - 11:35 am
IAD
-
LIS
9h 50m
1 stop
$681Royal Air Maroc
Mon, Jun 15 - Tue, Jun 23
Multiple Airlines Logo
7:25 am - 3:55 pm
LIS
-
IAD
13h 30m
1 stop
Multiple Airlines Logo
8:20 pm - 2:45 pm
IAD
-
LIS
13h 25m
1 stop
$697Multiple Airlines
Tue, Aug 25 - Sat, Sep 19
Air Canada Logo
6:45 am - 9:24 pm
LIS
-
IAD
19h 39m
2 stops
Air Canada Logo
4:00 pm - 11:05 am
IAD
-
LIS
14h 05m
1 stop
$698Air Canada
Tue, Aug 25 - Sat, Sep 19
Lufthansa Logo
6:45 am - 3:15 pm
LIS
-
IAD
13h 30m
1 stop
Lufthansa Logo
10:30 pm - 10:35 am
IAD
-
LIS
7h 05mnonstop
$699Lufthansa
Fri, Jun 19 - Sun, Jun 21
Lufthansa Logo
5:05 am - 3:55 pm
LIS
-
IAD
15h 50m
1 stop
Lufthansa Logo
10:20 pm - 10:45 pm
IAD
-
LIS
19h 25m
1 stop
$700Lufthansa
Sat, Nov 7 - Mon, Nov 9
United Airlines Logo
5:00 am - 3:55 pm
LIS
-
IAD
15h 55m
1 stop
United Airlines Logo
10:05 pm - 10:15 am
IAD
-
LIS
7h 10mnonstop
$701United Airlines
Wed, Jun 17 - Sun, Jun 21
Lufthansa Logo
5:05 am - 1:35 pm
LIS
-
IAD
13h 30m
1 stop
Lufthansa Logo
10:20 pm - 10:45 pm
IAD
-
LIS
19h 25m
1 stop
$704Lufthansa
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., Wednesday 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 Wednesday, 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 January, where tickets cost $544 (return) on average. On the other hand, the most expensive months are July and October, where the average cost of round-trip tickets is $1,006 and $930 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$521
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly and prices are also 5% 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 $521 for a one-way ticket and $678 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 $841 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 $705 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 $725 or less one-way and $955 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 9772 reviews
7.1Entertainment
6.6Food
7.3Comfort
8.1Crew
7.7Boarding
Airline reviews

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

2.0 MediocreChris, May 2026
AUS - IAD
Read more United Airlines reviews

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.

The economy seat was much less comfortable for an international flight in terms of recline and moving space when food tray is expanded. Per entertainment, it would be amazing if I could connect my Bluetooth headset or ear phones to the entertainment screen. Or provide in-flight wifi to connect directly from my own device.

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

Excellent service in Polaris class IAD to ZRH. Arrived rested and well fed after the overnight flight.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Terrific in every way. On time, professional staff, multiple movie options to select, great food and drink.

My bags were misplaced!!! Im in a foreign country with no bags

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.

The worst thing was baggage claim. In my return flight I was waiting 90 minutes for my baggage. and when I asked the airport they said it’s the airline. So frustrating after an 8-hour flight.

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.

Chaotic boarding with no announcements. Carry on luggage needs to be checked. Bare minimum zero frill flights. Not a whole lot of anything positive to be said .

It poured rain, our luggage was sitting out in it uncovered on the transport cart while our plane was delayed! Nice business class plane for short flight to Lisbon, but more delay & rain in Lisbon, with terrible Business class seat with no entertainment & cold food on longer flight to London…ALL LUGGAGE AND CLOTHES INSIDE THEM WERE SOAKED THROUGH!!! Could only try with hair dryer to get some drying before quick turn round to train trip.

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

Menzies group staff not very sympathetic good at breaking up families during the boarding process

The crew was great. There was a big guy sitting next to me who was hanging over my side of the armrest the entire time. Maybe some information about "Be considerate of your neighbors, this is tight space, be kind". The breakfast sandwich was not appealing at all.

Kayak let me choose these flights on TAP but then after 2 months, cancelled my flights because they didn't think 90 minutes was enough time for the connection. I notice that neither flight was actually cancelled. Just my reservation. Why let me go through all of that effort to find the right flights for us, only to cancel it from underneath us 2 months later leaving us scrambling to find an alternative?

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

Information on your arrival and departure airports