£196 Find Cheap Flights from Washington Dulles Airport to United Kingdom

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to the United Kingdom departing on 18/10. 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

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Best United Kingdom Flight Deals from Dulles Intl

Cheapest return prices found by our users on KAYAK in the last 72 hours
London
London1 stop£196
Manchester
Manchester1 stop£408
Edinburgh
Edinburgh1 stop£411
Birmingham
Birmingham1 stop£418
Belfast
Belfast1 stop£464
Bristol
Bristol2 stops£478
Aberdeen
Aberdeen1 stop£452
Liverpool
Liverpool2 stops£490
Inverness
Inverness1 stop£369
Cardiff
Cardiff1 stop£604
Exeter
Exeter1 stop£642
London
London1 stop£196
Manchester
Manchester1 stop£408
Edinburgh
Edinburgh1 stop£411
Birmingham
Birmingham1 stop£418
Belfast
Belfast1 stop£464
Bristol
Bristol2 stops£478
Aberdeen
Aberdeen1 stop£452
Liverpool
Liverpool2 stops£490
Inverness
Inverness1 stop£369
Cardiff
Cardiff1 stop£604
Exeter
Exeter1 stop£642

Cheap Flights from Dulles Intl to the United Kingdom

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

mar., 2 sep. - mié., 10 sep.
 Logo
22:20 - 15:40IAD-LHR
12h 20m1 stop
 Logo
08:40 - 16:15LHR-IAD
12h 35m1 stop
mié., 20 ago. - mar., 2 sep.
SWISS Logo
20:45 - 13:00IAD-LHR
11h 15m1 stop
SWISS Logo
08:45 - 16:15LHR-IAD
12h 30m1 stop
£234SWISS
Find Deal
mar., 2 sep. - mar., 9 sep.
Iberia Logo
22:40 - 11:05IAD-LHR
7h 25mdirect
Iberia Logo
06:10 - 15:00LHR-IAD
13h 50m1 stop
£361Iberia
Find Deal
mié., 1 oct. - mar., 7 oct.
Iberia Logo
22:45 - 11:05IAD-LHR
7h 20mdirect
Iberia Logo
10:50 - 15:00LHR-IAD
33h 10m1 stop
£372Iberia
Find Deal
mar., 26 ago. - mié., 3 sep.
British Airways Logo
19:25 - 07:45IAD-LHR
7h 20mdirect
British Airways Logo
06:15 - 15:00LHR-IAD
13h 45m1 stop
£374British Airways
Find Deal
lun., 28 jul. - mié., 6 ago.
Virgin Atlantic Logo
12:45 - 07:15IAD-LHR
13h 30m1 stop
Virgin Atlantic Logo
08:40 - 15:35LHR-IAD
11h 55m1 stop
£383Virgin Atlantic
Find Deal
mié., 10 sep. - lun., 15 sep.
British Airways Logo
19:25 - 07:45IAD-LHR
7h 20mdirect
British Airways Logo
20:00 - 15:00LHR-IAD
24h 00m1 stop
£385British Airways
Find Deal
mié., 8 oct. - jue., 16 oct.
Icelandair Logo
20:30 - 13:25IAD-GLA
11h 55m1 stop
Icelandair Logo
14:20 - 19:20GLA-IAD
10h 00m1 stop
£410Icelandair
Find Deal
dom., 13 jul. - mar., 22 jul.
Virgin Atlantic Logo
17:50 - 06:20IAD-LHR
7h 30mdirect
Virgin Atlantic Logo
08:40 - 15:35LHR-IAD
11h 55m1 stop
£412Virgin Atlantic
Find Deal
lun., 18 ago. - mar., 26 ago.
Icelandair Logo
23:15 - 13:25IAD-GLA
9h 10m1 stop
Icelandair Logo
14:20 - 22:10GLA-IAD
12h 50m1 stop
£412Icelandair
Find Deal
Useful Info

KAYAK's insights & trends for Dulles Intl to the United Kingdom flights

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

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

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

The cheapest ticket to the United Kingdom from Washington, D.C. Dulles Intl Airport found in the last 72 hours was to London, at £457 return. The most popular route is from Washington, D.C. Dulles Intl Airport (IAD) to London Heathrow Airport (LHR), and the cheapest round-trip airline ticket found on this route in the last 72 hours was £457.

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

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 £730 on average.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to the United Kingdom?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to the United Kingdom, 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 Washington, D.C. Dulles Intl Airport to the United Kingdom is January, when tickets cost £456 (return) on average. On the other hand, the most expensive months are June and December, when the average cost of return tickets is £725 and £648 respectively.

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

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

If you are looking for a flight deal from Washington Dulles Airport to United Kingdom, look for departures on Tuesdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from United Kingdom, Wednesday is the cheapest day to fly and Sunday is the most expensive.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to the United Kingdom?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to the United Kingdom, 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 Washington, D.C. Dulles Intl Airport to the United Kingdom, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.


Good to know - Cheap tickets from Washington Dulles Airport to United Kingdom

Low seasonFebruary
High seasonJuly
Cheapest flight£144
Best time to beat the crowds (17% less expensive on average)
Most popular time to fly (18% more expensive on average)
Flight from Washington Dulles Airport to London Heathrow Airport

Flights from Dulles Intl to the United Kingdom: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Dulles Intl to the United Kingdom 
DeeFlew with United AirlinesIAD-LHRFeb 2025
For me the best route to LHR is the late night departure on UAL. The flight is often roughly 6.5 hours so I skip dinner, use an eye mask and earplugs and try to sleep.
EllenFlew with British AirwaysIAD-LHROct 2024
Do not check your bag if at all possible, especially if you have a connecting flight. Your bag will not make it.
CraigFlew with United AirlinesIAD-LHRJun 2024
Get to beginning of boarding group early. Bring as little on board as possible due to small overhead bin space.

FAQs - booking United Kingdom flights

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to United Kingdom?

    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 Washington Dulles Airport to United Kingdom.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to United Kingdom?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Washington Dulles Airport to United Kingdom 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 Washington Dulles Airport to United Kingdom?

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

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to United Kingdom?

    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 from Washington Dulles Airport to United Kingdom up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to the United Kingdom?

    The cheapest time of day to fly to the United Kingdom is generally at night, when retur flights cost £785 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to the United Kingdom is generally in the evening, which is peak travel time and where the average cost of a ticket is £830.

Top tips for finding a cheap flight from Washington Dulles Airport to United Kingdom

  • Looking for a cheap flight from Washington Dulles Airport to United Kingdom? 25% of our users found tickets from Washington Dulles Airport to United Kingdom for the following prices or less: London £349 one-way - £531 round-trip

Top 5 airlines serving from Dulles Intl to the United Kingdom

 
Need help choosing which airline to fly with from Dulles Intl to the United Kingdom? 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 8790 reviews
7.7Boarding
7.3Comfort
7.0Entertainment
6.6Food
8.1Crew
Airline reviews

The boarding of took of late.The presentation of the food was horrable as was the tast of the food was cold and tastless.

4.0 OkayJ, May 2025ORD - EDI
Read more United Airlines reviews

The boarding of took of late.The presentation of the food was horrable as was the tast of the food was cold and tastless.

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

Liked fold flat bed. Didn’t like having no window. Didn’t like poor choice of food and being served dinner very late, hours after take off of a 7:40pm flight. Servers not friendly. Food horrible in business class.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

When I booked it on Kayak it aaid that I wasn't allowed hamd luggage. I called United Airlines and it took them 6 minutes to figure out if I was allowed free hand luggage. Surely something that simple they should be able to tell me instantly.

We were delayed in Toronto on the tarmac for THREE hours with no clear indication as to why except that it was not a safety hazard. Pilot did apologize more than once but even he was unable to explain why exactly we were delayed. I overheard the stewards saying that the captain was very frustrated with the situation as well because he was not able to explain why except it had something to do with water supply or system on the aircraft and now we needed to wait for an engineer to approve the aircraft for flight. It was very frustrating and distressing as a passenger and we should have been given complimentary meals at the very least.

Flight was cramped with every seat taken. The food was fine, nothing crazy to write home about. The plane felt dated and needing some TLC, the button for the window shade didn't work and there were no AC outlets to use. When communicating with staff all except one nice lady never seemed happy to help me almost like I was bothering them when asked for things like a glass of water or a snack. The flight was overall fine. It did what was needed which is get me from point A to point B. But it certainly was not special. I don't expect much in economy but I believe economy on a host of other airlines is more memorable and better experience.

The flight was heavily booked so boarding was a lengthy process. The FA’s were rather abrupt during this process but became more gracious as the flight went on. Breakfast (puffed pastry and chewy sausage) was pretty horrible but there was fruit and yogurt which they didn’t mess up. Overall it was fine.

Liked nothing. As per previous segment it was delay delay delay.

Fight was delayed an hour due to operational issues ,then further delayed due to ground control for a total of about 1.30 hours. Salad was completely frozen and flatware was so cold you could barely handle it. Crew was friendly and professional and the flight was smooth. The aircraft was clean and well-serviced.

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.

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

No food was served for 7.5 hrs flight. When our flight changed to other airlines due to wether issue, our seats booked with no checked in luggage when I already payed for. We end up to pay 90 euro per suitcase.

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.

Overall good. I was surprised how easy it was to get from plain to plain in such a short time. Food choices were not so great and quite expensive. Entertainment was ok. Flights were smooth.

Our three ski bags did not arrive and are still not delivered, one full day later. With one ski bag not traceable at all. I would not fly Iceland Air again.

From boarding, to attention in flight, I couldn’t fault it.

Not having to check carry on bags when plane wasn’t full. (The told us it was)

I was in business class for the 8 hour flight where: 1. The WiFi did not work 2. The entertainment system did not work 3. We were told there were no hot drinks for the entire flight

I had an issue with the name on my ticket vs my passport name. I was very upset that the Iberia ticket clerk had no authorization to help me and I was left to fix it. It took 19 calls of persons promising to accomplish and not doing anything before I reached someone who helped me in 10 minutes. Two of them even hung up on me. I missed my original flight because of this. Terrible customer service.

The flight was delayed twice. When the crew explained about the debris causing flat tires, I was glad they took the time to change all four.

My carry-on bag was taken from me when I boarded. It was checked through to London at no charge. It took a big of shuffling, but I was glad not to need to mind it until baggage claim.

Flight boarded three hours late for no reason other than someone made a huge error in crew scheduling. We missed our connecting flight in Madrid and got zero help from American or Iberian airlines on rebooking. We had to pay for a car to take us to the Madrid train station and pay for train tickets to Santiago. We never used our booked flight to Santiago. American claims I can submit the expenses but they are not obligated to cover them. Very frustrating.

Flight delayed Service could be better Iberia staff are not really friendly

They cancelled the flight)(they said bad weather but many other flights took off) and made us wait 5 hours in line to figure out what to do. We ended up making a new flight the next day on another airlines...I hope they honor giving us our money back

Awful. The flight wasn't actually operated by Iberia, but by American Airlines. I was unable to get my boarding pass and as a result missed my connecting flight.

The payment system was not working so was unable to connect wifi the entire flight

everything to do with KAYAK was terrible. Your customer facing departments are utterly useless, timewasting and unhelpful.

I ordered short ribs for main course. It tasted sweet, really sweet. Horrible.

The screen didn’t work and I didn’t get the seat upgrade I paid $300 for. They were no help with that,

Paid $180 for seat selection, and selection essnt honored. Have to call for a refund.

My flights were great and the crew on them was lovely especially the London to Barcelona flight as Al & AJ were so amazingly nice. I wish they would be my crew always as they have the best customer service. Sadly both flights were delayed the first one from Vegas was because they clearly loaded the cargo wrong the plane was off balance making us 2 hours late. This made me miss my connection and sadly it was challenging rebooking while I was on the flight. I will never use Kayak again as there was no customer service number or live chat and you rebooked me on a flight 2 days later. I had my mom call BA to change it which she did after spending an hour on hold. This should not be so difficult. My second flight was an hour delayed due to not being able to disconnect the bridge from the plane but I did finally make it home.

The delay was not communicated via text and the person who helped with check in also didn’t inform me about the delay. I ended up missing my connection and it was a waste of 5 hours. The crew didn’t mention there would be someone at the gate informing of if I would be rebooked and there was no signage. Overall a very poor experience. The British Airways app was also very buggy, and didn’t work. I will avoid flying with British Airways when possible.

A little better than outward journey but mild chaos at the boarding gate because some people with boarding cards from connecting flights had cards which weren't recognised

The BA business class cabin is excellent,very comfortable for sleeping but the service could be improved.

Surly rude flight attendants. I ordered the chicken and was given a vegetarian meal with no explanation and no opportunity to change it. I tried to order another beverage and was told by the young humorless flight attendant to “wait”. And she never came back. The seats were very uncomfortable and cramped. The last time I flew British Airways was many years ago but I remember it was amazing and the crew were very charming. This was a terrible disappointment given the cost of the flight.

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