LON - IAD

£213 Find Cheap Flights from London 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 London to Dulles Intl departing on 30/8. 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 London to Washington, D.C..
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Washington, D.C..
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Flights Deals

Cheap Flights from London to Dulles Intl (LON-IAD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London 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 return flight deals from London to Dulles Intl

Mon, 8 Sep - Mon, 29 Sep
 Logo
08:40 - 16:15LHR-IAD
12h 35m1 stop
 Logo
17:15 - 11:45IAD-LHR
13h 30m1 stop
Mon, 8 Sep - Mon, 29 Sep
Lufthansa Logo
16:40 - 19:55LHR-IAD
8h 15mdirect
Lufthansa Logo
18:40 - 06:55IAD-LHR
7h 15mdirect
£306Lufthansa
Find Deal
Wed, 8 Oct - Mon, 13 Oct
TAP AIR PORTUGAL Logo
16:25 - 15:20LGW-IAD
27h 55m1 stop
TAP AIR PORTUGAL Logo
17:45 - 15:35IAD-LGW
16h 50m1 stop
£322TAP AIR PORTUGAL
Find Deal
Thu, 18 Sep - Thu, 9 Oct
TAP AIR PORTUGAL Logo
16:35 - 15:20LHR-IAD
27h 45m1 stop
TAP AIR PORTUGAL Logo
17:50 - 22:05IAD-LHR
23h 15m1 stop
£324TAP AIR PORTUGAL
Find Deal
Mon, 25 Aug - Thu, 11 Sep
Virgin Atlantic Logo
11:30 - 19:15LHR-IAD
12h 45m1 stop
Virgin Atlantic Logo
17:50 - 06:20IAD-LHR
7h 30mdirect
£425Virgin Atlantic
Find Deal
Mon, 25 Aug - Thu, 11 Sep
British Airways Logo
12:45 - 15:55LHR-IAD
8h 10mdirect
British Airways Logo
17:50 - 06:15IAD-LHR
7h 25mdirect
£427British Airways
Find Deal
Tue, 9 Sep - Tue, 30 Sep
Virgin Atlantic Logo
06:30 - 15:35LHR-IAD
14h 05m1 stop
Virgin Atlantic Logo
17:50 - 06:20IAD-LHR
7h 30mdirect
£428Virgin Atlantic
Find Deal
Mon, 15 Sep - Thu, 18 Sep
British Airways Logo
12:45 - 16:00LHR-IAD
8h 15mdirect
British Airways Logo
17:50 - 06:15IAD-LHR
7h 25mdirect
£428British Airways
Find Deal
Sun, 17 Aug - Wed, 10 Dec
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
Icelandair Logo
19:40 - 10:55IAD-LGW
10h 15m1 stop
£528Icelandair
Find Deal
Sun, 17 Aug - Tue, 2 Jun
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
Icelandair Logo
20:30 - 14:40IAD-LGW
13h 10m1 stop
£545Icelandair
Find Deal
Expert advice

Expert advice for your flight from London to Dulles Intl

 
Snippets provided in this section are AI-generated based on a summarisation 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
British Airways

BA's premium economy offers more space, priority boarding, and increased baggage allowance.


BA's Executive Club offers Avios points for flights and partners, but check taxes first.

Virgin Atlantic

Virgin's Upper Class offers fully flat beds, exclusive lounges, and priority check-in.


Virgin Atlantic's Economy Delight includes extra legroom and priority boarding.

Lufthansa

Lufthansa's Premium Economy offers 50% more space and an extra 23 kg checked bag.


Lufthansa offers 11 special meals including gluten-free and kosher, order 24 hours before departure.

Read more about Lufthansaby Jessica Macdonald
Finnair

Finnair's Economy Comfort offers more legroom and USB ports for charging.


Finnair's A350 features lower cabin altitude and higher humidity for a better arrival.

Read more about Finnairby Gabriel Leigh
Austrian Airlines

Austrian Airlines' Premium Economy includes a complimentary drink on boarding.


Austrian's Miles & More offers lounge access and extra baggage for Frequent Travellers.

United Airlines

United Polaris offers lie-flat seats with aisle access, ideal for long-haul comfort.


United's Wi-Fi varies; check coverage map before purchasing for reliable connection.

Airports
LHR

Heathrow offers a Heathrow Express train to Paddington in 15 minutes. Book early for discounts.

Read more about LHRby Kirstie Pickering
IAD

The Silver Line Metro connects Dulles to central D.C. in about 50 minutes, offering a convenient travel option.

Read more about IADby Stefanie Waldek
Our travel experts
Duncan Madden

Duncan Madden

Expert on British Airways

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
Laura Ratliff

Laura Ratliff

Expert on Virgin Atlantic

Laura Ratliff

Laura Ratliff

Laura Ratliff is a New York-based writer and editor. She lives in downtown Brooklyn with her husband and their beloved dogs. Originally from Texas, she now considers New York City her home. She typically spends more than 200,000 miles on a plane each year and stays in plenty of hotels.

Read more
Jessica Macdonald

Jessica Macdonald

Expert on Lufthansa

Jessica Macdonald

Jessica Macdonald

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has travelled to more than 50 countries across six continents.

Read more
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Tara Craig

Tara Craig

Expert on Austrian Airlines

Tara Craig

Tara Craig

Tara Craig has been a journalist for 17 years, focusing on aviation for more than a decade. She has covered everything from how airports accommodate disabled passengers to the emergence of electric air taxis. Tara is constantly travelling and finds it hard to stop noticing things – good and bad – about the air travel experience.

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 out at sea, likely en route to Antarctica or the Arctic.

Read more
Kirstie Pickering

Kirstie Pickering

Expert on LHR

Kirstie Pickering

Kirstie Pickering

Aviation and business journalist Kirstie didn’t leave England until she was 18 years old, but has since travelled to over 20 countries including Japan, Canada, and Iceland. Her travel expertise lies in European city breaks, including how to find the best locally-owned hotels and restaurants and how to optimise the airport experience for your needs.

Read more
Useful Info

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

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

What is the cheapest London to Washington, D.C. Dulles Intl Airport flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from London to Washington, D.C. Dulles Intl Airport.

Our data shows that the cheapest route for a return flight from London to Washington, D.C. Dulles Intl Airport cost £444 and was between London Heathrow Airport (LHR) and Washington, D.C. Dulles Intl Airport (IAD). On average, the best prices are found if you fly this route. The average price for a return flight for this route is £444.

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

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

Your flight ticket price will generally be cheaper if you fly to Washington Dulles Airport on a Wednesday and more expensive on a Sunday. On your return trip to London, you should consider flying back on a Tuesday, and avoid Saturdays for better deals.

What is the cheapest month to fly from London 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 London 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 London to Washington, D.C. Dulles Intl Airport is March, where tickets cost £499 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is £676 and £664 respectively.

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

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at £1,319 on average.

How far in advance should I book a flight from London 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 London 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 London to Washington, D.C. Dulles Intl Airport, you should book around 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.


Good to know - Cheap tickets from London to Washington Dulles Airport

Low seasonJanuary
High seasonJuly
Cheapest flight£213
Best time to beat the crowds (4% less expensive on average)
Most popular time to fly (17% more expensive on average)
Flight from London Gatwick Airport to Washington, D.C.

When to book flights from London to Dulles Intl

Are your dates flexible? Find out the best times to travel from London to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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 London to Washington Dulles Airport flights

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

    In the last 3 days, the lowest price for a flight from London to Washington, D.C. Dulles Intl Airport was £289 for a one-way ticket and £406 for a return.

  • Which airports will I be using when flying from London to Washington Dulles Airport?

    When flying out of London you will be using one of these airports: London Gatwick, London Heathrow, London Southend, or London Stansted. You will be landing at Washington, D.C. Dulles Intl.

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

    Only KLM offers inflight Wi-Fi service on the London to Washington Dulles Airport flight route.

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

    The Boeing 777 is the aircraft model that flies most regularly on the London to Washington Dulles Airport flight route.

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

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between London and Washington Dulles Airport, with Star Alliance being the most commonly used for this route.

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

    There are direct flights from London to Washington Dulles Airport on a daily basis.

  • Which is the best airline for flights from London to Washington, D.C., Finnair or Air France?

    The two airlines most popular with KAYAK users for flights from London to Washington, D.C. are Finnair and Air France. With an average price for the route of £576 and an overall rating of 7.6, Finnair is the most popular choice. Air France is also a great choice for the route, with an average price of £621 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from London 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 London to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London 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 London is likely to change within 7 days, so travellers know whether to wait or book now.

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Washington Dulles Airport with an airline and back to London with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London 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 London 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 London to Washington, D.C. Dulles Intl Airport

  • Looking for a cheap flight from Washington Dulles Airport to London? 25% of our users found flights on this route for £597 or less one-way and £517 or less round-trip.

Prefer to fly direct from London to Washington Dulles Airport?

Find which airlines fly direct from London to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

London to Washington, D.C. Dulles Intl

Monday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Tuesday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Wednesday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Thursday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Friday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Saturday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Sunday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

See more direct flights

Direct returns

Washington, D.C. Dulles Intl to London

Monday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Tuesday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Wednesday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Thursday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Friday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Saturday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Sunday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

See more direct flights
See more direct flights

Top 5 airlines serving from London to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from London 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 London 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
Virgin AtlanticOverall score based on 652 reviews
8.1Crew
7.6Boarding
7.2Comfort
6.9Food
7.5Entertainment
Airline reviews

Super friendly and helpful staff, from check-in desk to cabin crew.

10.0 ExcellentJoe, May 2025JFK - MAN
Read more Virgin Atlantic reviews

Super friendly and helpful staff, from check-in desk to cabin crew.

Following a paid seat upgrade for enhanced comfort, I encountered an unacceptable odor in my assigned area. It took three hours for the crew to relocate me, and the replacement seat was unacceptably close to the lavatory, offering no improvement.

Good overall. Cannot fault the airlines. I have had better entertainment systems before ie ice in Emirates but it was not too bad. Food was decent and staff were friendly.

I did not fly by vergin atlantic from bangalore to vasco da gama

Your flight delayed at Heathrow n I almost missed my mother funeral.you idiots. I had to waste 10 hours in different airports. Thank your stars I'm not suing you.

Miami airport needs more thorough signage. It was a long walk from my transport point to the check in desk,

Flight took off an hour late. Had to stay on the tarmac for half an hour after landing. Both annoying.

We had an unfortunate experience where we had to leave the aircraft after boarding, shortly before the scheduled takeoff time, and re-board. The reason given was that a passenger felt ill and had to cancel their plans and therefor their luggage had to be found and removed.

We’ve used VA before many times the experience is always been good they have lovely staff and the food is always delicious.

Everything about the flight was amazing from check in to boarding entertainment was okay food we didn’t try.

Seats in premier saga class were narrow and hard. Very uncomfortable for a 5-hour flight.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset. If there is option to use another company, I suggest to other people use them.

I had an exit row and so was Comfortable on the long flight.

The seats on this airline are sooo small, even for a petite person. I felt like the seat tilted forward and I was fighting to stay in it. The lavatory is horribly small, with a wet floor because the sink is so small you can't help but splash the water all over when washing up.

For an economy lite experience, it's by far the best I've had. New planes, clean, great destinations. Very happy to have discovered Iceland Air.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

Good. Lacking overhead bin space. No food offered but you can order online or in flight and pay for snacks.

The flights were in time and the bags arrived. well done

Only serving 2 small coffee in 7.5 hrs flight with very limited choice to order food.

For a no frills flight this was surprising comfortable. The crew were helpful and nice. The flight was smooth and there were no delays or issues which I haven't had on a flight in a long time. I would definitely fly with them again.

The flight was canceled by play less than 24 hours prior to the trip, and I was unable to re-book. Have not received a refund for the trip despite filling out the appropriate form.

Was was cancelled less than 24 hours prior to my scheduled departure by PLAY. Despite my attempts to rebook my travel, I encountered significant cost increases that rendered this option unfeasible. In accordance with EC Regulation 261/2004, airlines are required to issue a full refund for cancelled flights within seven days of the scheduled departure if a refund is requested instead of rebooking on another flight. It has been three weeks without a refund or an answer

Have not recieved full refund for my flight, which was cancelled less than 24 hours prior to my scheduled departure by PLAY. Despite my attempts to rebook my travel, I encountered significant cost increases that rendered this option unfeasible. In accordance with EC Regulation 261/2004, airlines are required to issue a full refund for cancelled flights within seven days of the scheduled departure if a refund is requested instead of rebooking on another flight. This request was completed three weeks ago an answer or refund.

It would have been better to have USB charging ports available on the longer haul Flight that one of 2 hours

Was very good Staff was great. No tv monitors tho. So long flights make it longer

The worst. No free beverages. No entertainment on an overseas flight. Not enough space. Never again.

Play is affordable! Only way we fly from the states to Europe. Left late but arrived on time

have screens on backs of chairs...offer free snacks and water

Boarding and crew was great. Flight was cold, need layers. Deplaning was hard. We had to take stairs off the plane and I was separated from my travel companion because we were not seated together and they would not let him wait for me to get off so we were forced onto different shuttles.

The flight was delayed by an hour. Made the connection uncomfortably tight.

When we went to the lounge they told us to go into the main lounge and not the full business class section, later they told me that Lufthansa wont pay the full fee to alloq the business class passengers entry to the nicer sectikn where all the other airlines nusiness class passengers go into. Very poor arrangement.

Eet late informed about delay of more rhan four houts

Happy and nice crew and the atmosphere is very easy and calm. I got a wonderful travel with UA this time

Food service was good. Aircraft was old and needed upgrade such as seats. Flight was delayed about 1 hour.

Not what I expected for the last leg of a $5100 business class experience. Boarding was a nightmare. The flight was delayed and I had to keep checking my email to ensure I was at the right gate since the airline or the terminal had no clue until 15 mins prior to boarding. Food was gross, limited drink options.

Flights scheduled with impossible connections - Lufthansa apparently believes it takes 7mins to change terminals, go through passport control, re-clear security and walk 1.8kms…..and everything will work perfectly (which it never does at Frankfurt). No staff on hand to assist with transfers on delayed flights. No transfer guidance provided by app. No compensation offered for 6hr delay to connecting flight.

Crew were professionals. However, the plane seats are too small -essentially there is no space to move around which for so many hours is almost inhuman but certainly unacceptable. Same with the bad quality of food and the fact that you need to purchase Wi-Fi

Crew were friendly and very helpful Plane was clean and the legroom is standard. Overall a good flight, no complaints.

Amazing! The food was great! Best airline meal ever. The crew was so nice and pleasant.

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

The first class seats were unusable, mine at the end of the flight, my husband's in the middle of the flight, and the one next to me was unusable either, they had to move the person to another seat.

Last minute gate change. Didn’t put our TSA global on our trip even though we asked multiple times to confirm. Did not help with food when could not eat what was served.

The cabin was bit colder than I like but the crew members looked after us very well. They did even offer hot water bottle and hot chocolate. I cannot rate the crew enough excellent is not good enough. They really were wonderful.

Boarding is always a challenge as folks in al groups crowd around for no reason, but crew handled it well. I once again applaud the LHR ground baggage staff as they got our bags from a flight at Terminal 5A to a flight in Terminal 5C within 40 minutes...amazing!

This flight from London to Chicago was actually on an AA airline. I did book through BA but the flight was AA. Great flight, hectic in Chicago, I wouldn't choose to fly through Chicago again, but that's not the airlines fault. The flight itself was great.

Push back is not working when I complaint a male staff he told me that most of the seats are like that so we can’t do anything

Seats were way too small. I got claustrophobic waiting for trash from meal to be taken away. I couldn't move to even close my tray until trash was taken.

Boarding was fairly chaotic. One of your employees clipped my ankle as he was passing with an empty wheelchair and not only did not apologize but stated something to the effect of “oh forGod’s sake.” There was plenty of room for him to pass. otherwise, everything was excellent.

Fantastic! Great seats! Friendly staff! Amazing selection of shows and movies! Smooth ride! I don’t know what more I could have asked for honestly. They made flying a breeze this time around.

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

Information on your arrival and departure airports

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