LON - IAD

£333 Find Cheap Flights from London to Washington Dulles Airport – 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 London to Dulles Intl departing on 21/9. 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 return fare
£439
Typical prices: £429-£558
Icelandair
Wed 23/9Sun 27/9
LHR - IAD • 1 stop
Cheapest direct flights
£439
Typical prices: £446-£575
British Airways
Sat 12/9Sat 26/9
LHR - IAD • Direct
Advice from real travellers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Virgin Atlantic Economy Delight adds legroom and priority boarding on this long-haul route.
Lufthansa Premium Economy adds more space and an extra 23 kg checked bag.
Expert advice
Expert advice
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Top airlines
Cheapest • from £439 (return)
Best reviews • 7.5 score
Airline reviews
Airline reviews
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+1
Airline reviews
Airline reviews
+1
Direct flights
You can fly direct with British Airways, United Airlines, and Virgin Atlantic. Average duration is 8h 15m
Direct flights
Direct flights
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Direct flights
Direct flights
+1
Top routes
Cheapest
Most popular
Insights
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Avoid delays
Most punctual • 89% on-time
Best time • Fewest delays
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Top stopover airports
Cheapest • Avg £452 (return)
Shortest trip • 11h 05m (one-way)
Insights
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When to book
in advance
Our data shows that travellers who book at least 5 weeks in advance save around 30% compared to booking last minute.
Insights
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When to travel
Cheapest • 10% price drop
Most popular
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We hope you love your trip to Dulles Intl!
Flight Deals
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Flight 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

Wed, 23 Sep - Sun, 27 Sep
Icelandair Logo
13:05 - 19:20
LHR
-
IAD
11h 15m
1 stop
Icelandair Logo
23:20 - 20:20
IAD
-
LHR
16h 00m
1 stop
£439Icelandair
Tue, 1 Sep - Mon, 14 Sep
Icelandair Logo
13:05 - 22:15
LHR
-
IAD
14h 10m
1 stop
Icelandair Logo
20:30 - 20:20
IAD
-
LHR
18h 50m
1 stop
£439Icelandair
Thu, 22 Oct - Mon, 9 Nov
British Airways Logo
13:25 - 19:10
LHR
-
IAD
10h 45m
1 stop
British Airways Logo
18:05 - 06:15
IAD
-
LHR
7h 10mdirect
£439British Airways
Fri, 25 Sep - Fri, 2 Oct
British Airways Logo
08:50 - 15:45
LHR
-
IAD
11h 55m
1 stop
British Airways Logo
17:45 - 06:20
IAD
-
LHR
7h 35mdirect
£439British Airways
Wed, 9 Sep - Wed, 23 Sep
TAP AIR PORTUGAL Logo
19:50 - 15:10
LHR
-
IAD
24h 20m
1 stop
TAP AIR PORTUGAL Logo
17:45 - 18:50
IAD
-
LHR
20h 05m
1 stop
£439TAP AIR PORTUGAL
Fri, 18 Sep - Mon, 21 Sep
TAP AIR PORTUGAL Logo
06:00 - 14:25
LHR
-
IAD
13h 25m
1 stop
TAP AIR PORTUGAL Logo
17:40 - 18:50
IAD
-
LHR
20h 10m
1 stop
£439TAP AIR PORTUGAL
Tue, 8 Sep - Tue, 15 Sep
Multiple Airlines Logo
08:45 - 16:45
LHR
-
IAD
13h 00m
1 stop
Multiple Airlines Logo
22:05 - 10:40
IAD
-
LHR
7h 35mdirect
£441Multiple Airlines
Fri, 23 Oct - Fri, 30 Oct
SWISS Logo
17:15 - 16:45
LHR
-
IAD
28h 30m
1 stop
SWISS Logo
18:25 - 16:20
IAD
-
LHR
17h 55m
1 stop
£442SWISS
Thu, 26 Nov - Sun, 29 Nov
SWISS Logo
18:40 - 15:30
LHR
-
IAD
25h 50m
1 stop
SWISS Logo
20:10 - 13:00
IAD
-
LHR
11h 50m
1 stop
£442SWISS
Sun, 22 Nov - Sun, 29 Nov
Multiple Airlines Logo
06:00 - 15:30
LHR
-
IAD
14h 30m
1 stop
Multiple Airlines Logo
18:20 - 06:40
IAD
-
LHR
7h 20mdirect
£442Multiple Airlines
Booking Insights

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.

How much is a return flight from London to Washington, D.C. Dulles Intl Airport?

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

Flight prices are below average for this route right now.

Flights to Washington, D.C. Dulles Intl Airport from London usually cost between £501 and £650 in September.
The lowest price found in the past 5 days was £439 on Icelandair (23 Sept–27 Sept).

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

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from London to Washington, D.C. Dulles Intl Airport costs £425 on the route between London Heathrow Airport (LHR) and Washington, D.C. Dulles Intl Airport (IAD). It is also the most popular route.

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 Friday and more expensive on a Sunday. On your return trip to London, you should consider flying back on a Tuesday, and avoid Fridays 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 September, where tickets cost £488 (return) on average. On the other hand, the most expensive months are August and December, where the average cost of round-trip tickets is £585 and £582 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 £553 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, which saves you about 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Expert advice

Expert advice for your flight from London 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
Laura Ratliff

Laura Ratliff

Expert on Virgin Atlantic

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.

Duncan Madden

Duncan Madden

Expert on British Airways

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.

Jessica Macdonald

Jessica Macdonald

Expert on Lufthansa

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.

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

Tara Craig

Tara Craig

Expert on Austrian Airlines

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.

Gabriel Leigh

Gabriel Leigh

Expert on Finnair

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.

Kirstie Pickering

Kirstie Pickering

Expert on LHR

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.

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

Low season

January

Cheapest flight

£333
Best time to beat the crowds (7% less expensive on average)
Most popular time to fly (4% more expensive on average)
Flight from London Heathrow Airport to Washington Dulles Airport

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 5 days, the lowest price for a flight from London to Washington, D.C. Dulles Intl Airport was £333 for a one-way ticket and £439 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?

    Star Alliance, oneworld, 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., KLM or Austrian Airlines?

    The two airlines most popular with KAYAK users for flights from London to Washington, D.C. are KLM and Austrian Airlines. With an average price for the route of £615 and an overall rating of 7.8, KLM is the most popular choice. Austrian Airlines is also a great choice for the route, with an average price of £561 and an overall rating of 7.6.

  • 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 £553 or less one-way and £514 or less round-trip.

Prefer to fly direct from London to Washington Dulles Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from London to Washington, D.C. Dulles Intl.
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

Reviews of the top 5 airlines flying 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.
7.5
Virgin AtlanticOverall score based on 694 reviews
7.7Boarding
7.5Entertainment
8.1Crew
6.9Food
7.3Comfort
Airline reviews

Lounge was top notch h with great variety of food and drinks. Cabin crew were great. Smooth flight.

10.0 ExcellentLye Sim, Jun 2026
LHR - JFK
Read more Virgin Atlantic reviews

Lounge was top notch h with great variety of food and drinks. Cabin crew were great. Smooth flight.

My seat 3G did not go down fully and the buttons were not working properly

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Security area in terminal 3 needs to be made much nicer. Less claustrophobic and use of glass and big ceilings wouldhelp

accomodating check in staff, friendly flight crew ( a crew member was speaking tactlessly and was overfamiliar with passengers

Seats need to be updated. Allowance needs to be made for dinner service at an alternative time

If I could fly Virgin Atlantic airlines to every place, I need to go, I would. Leaving Heathrow through the special virgin air entrance, security is completely white glove service. I love this airline. From ticketing agents to flight staff everyone tries to make it a wonderful & happy flight experience. I wish other airlines copied the positive culture of Virgin Airlines.

Premium was very comfortable. Food was delicious. I had specific diet requirement and Virgin Atlantic ensured it was provided. Onboard crew was very friendly and caring. Extremely smooth journey. I wonder how upper class experience would be. Perhaps one day, I will try upper class.

On arrival to JFK it to 3.5hrs to clear immigration, as only 3 booths open. Almost missed connection

Our flight was great with an unexpected upgrade. However, four days into our travel we are still without a piece of luggage. The bag tracker has not been accurate, the airline is not communicating with me or the luggage delivery service and no one is willing to take responsibility or guarantee any kind of support or reimbursement. Unfortunately, we do not have the option to easily shop to replace items as we are currently on a cruise. I have been very disappointed by United Airlines response.

The flight was canceled. I couldn't get on another flight. Meal voucher wouldn't work. The whole experience was a clusterfuck.

It was terribly delayed with zero support from united airlines. I reached at 1 am in the night. They did not provide any option to change the flights.

Flight was delayed 14 hours due to DC air show and weather. Missed connection to MUC.

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.

Left late after one day delay. Even after we were called to board we stood in line for 30 minutes. Seemed disorganized.

My flight was canceled and we had to beg for united to find us another way home - we were rerouted to Toronto but they never booked us on the final leg back to DC. We had to stay overnight in Toronto, we're now waiting for our flight home and just found out we're on standby and not guaranteed a seat. So yeah, not a great experience with united

The food that was offered based on class level of your ticket was absolutely ridiculous and disgusting. They didn't even hot tea to serve, the food was horrible. On our departure flight I was seated in premium plus economy and considering the cost of the flight the food was literally some of the worst I've ever eaten. On the return flight I sat in economy with extra leg room and was given a thin little throw "blanket" and a flimsy little pillow. The air condition was on artic and the seating arrangement wasn't really worth the money. The seat didn't recline good enough and the foot rest was laughable. Total waste.

I was seated to an oversized overweight person that spread over to my seat. His shoulder overlapped my seat very uncomfortable.

Like getting a bus. No great luxury but will get you there

Got us to destination alive, albeit a bit late. Luggage was left behind. No live tracking app available (available on some other airlines). Supposedly going to be delivered in next couple of days.

I was not admitted to the flight!!! i need a refund for this.

I had zero issues with the flight. I did have issues with the staff at the airport. We missed out flight due to a delay with another airline. Talking to the staff and trying to get a new flight arranged was challenging. One guy was able to try to help us and got us on a new flight, but other staff was dismissive and clearly let us know it wasn’t their problem. All I kept thinking was… this is why air lingus has such a poor customer service reputation. I will be avoiding this airline in the future.

I liked that I went thru customs in Dublin instead of having to do that in LA.

I was so grateful for the kindness of the crew. They made a long trip very pleasant. Food was delicious. Many movie options

We were very satisfied and would fly with Aer Lingus again in the future.

Very good except for the boarding process which was more hectic than it should have been

during a very rough flight, I was forced to sit in a last row seat, fell asleep, and was forced to return to my assigned seat after the turbulence. The stewardess then used that seat to sleep.

First the price I paid was excellent, my flight was full, but my seat was roomy. The one downside to the experience was they had games on the entertainment console. The guy behind me poked at my head about half the flight. I hope they get rid of this feature.

Cancelled 90 min AFTER Departure! We had to deplane and wait another hour plus for the flight to be shown as cancelled for the customer service team. There were many many angry customers.

Bulkhead seats should not be an extra charge. They are extremely uncomfortable. And we missed our connecting flight due to slow luggage retreaval.

Lufthansa flight LH04414 from Munich to Washington DC, was fine. Efficient and safe!

Bumpy ride, not Lufthansa‘s fault. Crew managed a situation over a back rest to far down well. It was two iles behind me. The person putting the seat down, against the other person’s knees, was quite rude and belligerent and needed to be told in a no nonsense matter to stopp. Male flight attendant did good job.

Had a few open seats and could use it for a great rest ful journey

It was very good. Service was friendly and efficient, and food was good.

We left 1.5 hours late therefore missing my connection. The airline didn’t give vouchers.

Food could have something without dairy, I couldn't eat anything. Tv for both seats was malfunctioning. They have one bottle of ginger ale for entire plane.... and I paid extra for these seats...very disappointed

We took two long flights with Lufthansa, both were delayed making us miss our connecting flights. Lufthansa took care of the first one. The second was a switch to United and figuring out how to rebook was not a pleasant experience.

Boarding was a zoo. London ground crew was useless. Poor communication regarding where to line up. We were group 2, and everyone was jammed in together. Ground crew didn’t seem to care.

Because our ABZ-LHR flight was cancelled by BA for reasons they refuse to tell us--not weather--we did not make this flight and were booked on the following day. BA offered no assistance to us on the phone or in the airport, and we had to find a hotel at Heathrow on our own.

Horrible - flight was delayed by 6 hours - we boarded, were made to de-board due some technical fault; aircraft changed; special meals request on new flight - all went awry. Landed in Dulles airport; breezed thru immigration; as Business Class passengers or baggage was delivered almost 90 minutes after landing; air tags indicated the bags were just near the carousel but the unhelpful BA staff - Maria and Ghina refused to give any update - palming it off on some imaginary invisible “manager” despite air tags evidence showing it right there. So about 50-60 passengers waiting and getting infuriatingly impatient for their bags coz one container was not delivered. Finally after much argument by some other passengers Maria condescended to go to the “ramp” and within 5 minutes the baggage was delivered miraculously. Question is why couldn’t she have done it one hour earlier ? Poor poor experience once again on Business Class BA.

Seating space is appalling. Seats and all surrounding area in "Economy" is built for individuals shorter than 4' 10" and below 120 lbs. Ridiculous. While I'm not expecting fine dining, the food was the worst airplane food that I can recall.

A shout-out to the flight attendent, Lauren, who was the main person assisting me. She was amazing - perfect balance of bright, cheerful, engaging, yet formal

It was good. Couldn’t Check in online and select seats

Check in was not the greatest as had to talk to an agent to clarify things and then he transferred us to another agent who had difficulty processing my credit card as there was a system glitch and not a card error.

I was put into business class. Wow! My flight attendant was great! The food amazing’

Waited 3.25 hours in plane only to have the flight cancelled.

The worst, flight cancelled because the aircraft was not full. Heathrow ground crew totally not helpful and arrogant. Lady proposed us flight with 40min layover instead of direct and said it is our problem of course she was unable to do anything as everything was beyond her control she claimed. after calling on hotline another flight was booked. Flight was cancelled last second so we could not take direct from Zurich but we had to stay overnight in London.

They did not provide free WiFi, It could be purchased for, I think, around $25, This seemed excessive.

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

Information on your arrival and departure airports