$192 Find Cheap Flights from Washington, D.C. to the 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 Washington, D.C. to the United Kingdom departing on 2/5. 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.
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1 adult, Economy, 0 bags

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Cheap Flights from Washington, D.C. to the United Kingdom

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
London
London2 stops$571
Edinburgh
Edinburgh2 stops$494
Manchester
Manchester2 stops$472
Birmingham
Birmingham1 stop$607
Belfast
Belfast2 stops$558
Inverness
Inverness1 stop$494
Bristol
Bristol2 stops$476
Aberdeen
Aberdeen2 stops$621
Leeds
Leeds2 stops$576
Liverpool
Liverpool2 stops$604
Cardiff
Cardiff2 stops$526
Newquay
Newquay2 stops$820
London
London2 stops$571
Edinburgh
Edinburgh2 stops$494
Manchester
Manchester2 stops$472
Birmingham
Birmingham1 stop$607
Belfast
Belfast2 stops$558
Inverness
Inverness1 stop$494
Bristol
Bristol2 stops$476
Aberdeen
Aberdeen2 stops$621
Leeds
Leeds2 stops$576
Liverpool
Liverpool2 stops$604
Cardiff
Cardiff2 stops$526
Newquay
Newquay2 stops$820

Book Cheap Washington, D.C. to the United Kingdom Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. 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 round-trip flight deals from Washington, D.C. to the United Kingdom

Sat, Jan 31 - Sat, Feb 7
Multiple Airlines Logo
7:40 pm - 3:10 pm
IAD
-
EDI
14h 30m2 stops
Multiple Airlines Logo
8:20 am - 6:30 pm
EDI
-
IAD
15h 10m2 stops
$499Multiple Airlines
Thu, Jan 22 - Thu, Jan 29
Multiple Airlines Logo
7:40 pm - 10:30 pm
IAD
-
EDI
21h 50m2 stops
Multiple Airlines Logo
7:45 am - 6:30 pm
EDI
-
IAD
15h 45m2 stops
$517Multiple Airlines
Wed, Dec 31 - Tue, Jan 13
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m1 stop
$575Icelandair
Wed, Dec 31 - Thu, Jan 15
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m1 stop
$577Icelandair
Mon, Dec 29 - Fri, Jan 16
Air Canada Logo
5:48 pm - 7:10 am
IAD
-
LHR
32h 22m1 stop
Air Canada Logo
6:50 am - 4:24 pm
LHR
-
IAD
14h 34m2 stops
$580Air Canada
Wed, Jan 14 - Wed, Jan 21
Air Canada Logo
12:55 pm - 9:20 am
DCA
-
LHR
15h 25m1 stop
Air Canada Logo
9:00 am - 7:45 pm
LHR
-
DCA
15h 45m2 stops
$581Air Canada
Wed, Jan 21 - Wed, Feb 4
British Airways Logo
11:46 am - 7:30 am
DCA
-
LGW
14h 44m1 stop
British Airways Logo
11:20 am - 9:24 pm
LGW
-
DCA
15h 04m1 stop
$613British Airways
Mon, Jan 12 - Thu, Jan 29
British Airways Logo
8:20 am - 7:30 am
DCA
-
LGW
18h 10m1 stop
British Airways Logo
11:20 am - 11:25 pm
LGW
-
DCA
17h 05m1 stop
$614British Airways
Sat, Jan 17 - Sat, Jan 24
American Airlines Logo
11:46 am - 7:30 am
DCA
-
LGW
14h 44m1 stop
American Airlines Logo
11:20 am - 9:24 pm
LGW
-
DCA
15h 04m1 stop
$615American Airlines
Sat, Jan 17 - Sat, Jan 24
American Airlines Logo
10:10 am - 7:30 am
DCA
-
LGW
16h 20m2 stops
American Airlines Logo
12:30 pm - 12:34 am
LGW
-
DCA
17h 04m2 stops
$620American Airlines
Booking Insights

KAYAK's insights & trends for Washington, D.C. to the United Kingdom flights

Get data-powered insights and trends into flights from Washington, D.C. 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. to the United Kingdom flight route?

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

The cheapest ticket to the United Kingdom from Washington, D.C. found in the last 72 hours was to London, at $531 round-trip. 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 $555.

Can I save money by flying with a layover from Washington, D.C. to the United Kingdom?

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.

No, with an average price for the route of $828, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Washington, D.C. 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. 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. to the United Kingdom is September, when tickets cost $623 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is $977 and $947 respectively.

What’s the cheapest day of the week to fly from Washington, D.C. to United Kingdom?

The average price of all round-trip flights from Washington, D.C. 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, D.C. to United Kingdom, look for departures on Wednesdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from United Kingdom, Thursday is the cheapest day to fly and Monday is the most expensive.

How far in advance should I book a flight from Washington, D.C. 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. 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. to the United Kingdom, you should book around 3 weeks before departure, which saves you about 20% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$192
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 13% increase in price.
Flight from Baltimore to London Gatwick Airport

Flights from Washington, D.C. to the United Kingdom: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Washington, D.C. to the United Kingdom 
DeeFlew with United Airlines
IAD
-
LHR
Feb 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 Airways
IAD
-
LHR
Oct 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 Airlines
IAD
-
LHR
Jun 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, D.C. to the 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, D.C. to the United Kingdom.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Washington, D.C. to the United Kingdom 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 Washington, D.C. to the United Kingdom?

    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 from Washington, D.C. to the 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, D.C. to the 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, D.C. to the 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 round-trip flights cost $811 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 $811.

Reviews of the top 5 airlines serving from Washington, D.C. to the United Kingdom

 
Need help choosing which airline to fly with from Washington, D.C. 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 9093 reviews
7.1Entertainment
6.6Food
8.1Crew
7.7Boarding
7.3Comfort
Airline reviews

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

4.0 OkayAnonymous, Dec 2025
IAD - GRU
Read more United Airlines reviews

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

We were told the flight was delayed 5 times, then it was moved to the next day.

Flight delay was communicated before leaving for airport which caused it to be a non-event. Great flight and crew!

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

Disliked having to wait a little longer to disembark from the plan when we landed in London

Food should be better quality. Video screens have poor resolution and the library of movies is poor. The other airlines are much better.

The trip was smooth but the crew were very abrupt, snatching things before finished and being quite snappy when asked questions.

My wife and I love to travel, so we fly a lot. We've already logged 381,075 miles and with practically every major airline. But this flight was very disappointing. It started off well, with no delays and a new plane. But when lunchtime approached, all that good impression was ruined. Instead of white tablecloths, we were offered small, dark placemats, which, as it turned out, were perfectly adequate for the food. All the food offered—and my wife and I only took fish, and the meat—was not just bad, it was downright disgusting and not heated enough. The same applies to the appetizers. This was the first time in many years of traveling that we've been offered such disgusting food.

Lost luggage stuck no clothes and no word after 2 days leaving on cruise no stuff or clothes

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

Food - Non-Existent. You pay for everything. It is strictly Pay-to-Play!

The Experience Was Torture Spend a few extra dollars and avoid Icelandair at all costs. There is absolutely no refreshments, no food, no drinks. Only water, coffee, tea are free and at only half a tiny cup. Entertainment is limited selection of films, shows and mostly outdated. The seats are smaller than usual, with no cushion, no pillows, no blankets. First time in my life have I witness an airline asking for donations in spare change for a charity. With all the money Icelandair saves by starving the passenger, they can afford to give this charity on their own.

Again, we paid $ 328.00 for specific seats are were assigned those seats.

Having been prepared for paying for everything on board other than water, coffee and tea the service was OK. Food and drink is expensive but the food was OK if limited in scope. Plane was clean and obviously well serviced. After complaining about having to walk in wind and rain to a get a bus to the airport the same thing happened at Portland. I’m sure you could get a terminal gate flight, complimentary food and drink for not much more money without traipsing through rain and slush in Reykjavik. Not bad but not great.

The boarding process seem to take longer than necessary, resulting in a 20+ minute delay

It was too cold in the plane my feet froze

Handling our luggage was the biggest issue - they lost it and we got it almost 3 days later. Really threw off the beginning of our trip and we really had to change our itinerary accordingly.

Seat was hard and uncomfortable and the temperature too warm and uncomfortable.

Worst airline I’ve ever flown. Delayed 5.5 hrs, missed connecting flight, and missed an entire day of vacation. Zero customer service

Everything sucked. No food, one small glass of water, a tiny coffee, 5.5 hour delay with no customer service. Would never recommend flying them.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

Everything went smoothly, and we even arrived 40min earlier than scheduled, on an Orland-Madrid route.

The staff was very nice and helpful. Some of the best crew I have met.

Suddenly, I don't find my flight back on the app Help Ticket 0757345716866 Hoeflich Flight back Sunday ib5333 Ib2629 Ib4268

Was all good.l including a sofdrink. AA improved significantly. There was no entertainment.

I've taken British Airways before and it has been great. On this trip to Spain and Portugal we had two BA flights. On both flights we were taken by bus from the terminal out to the plane on the tarmac. There were many older folks on these flights, and to ask people in their 70s to lug their carry-on and personal items up the long mobile staircase to the plane entrance, is very disturbing. I won't be taking British Airways in the future. Many people on these flights were very unhappy.

The food on the flight was of marginal quality. Small bits of chicken, instant mashed potatoes and some carrots. The rolls were very dry, nearly inedible. The seats were quite small and didn’t allow for any shifting of position during the flight. There was limited leg room.0

The seats are so small that you can barely move at all. Don't try to eat with utensils in your seat either - you will elbow your neighbor in the face. Miserably small and I swear they are shrinking every time I fly. Food was meh (per usual), but at least there is free alcohol on an overseas flight. Doesn't make up for sitting in a torture chamber while hurtling through the air with hundreds of fussy people, but it's something. Entertainment options (movies, shows) are okay, nothing special, but at least there are screens, because most of the seats in these large planes do not have adjustable lighting - or air control - that you can get to, it's too high to reach - which makes reading impossible. Zero stars, AA.

Terrible customer service. I booked business class and the counter agent didn’t bother asking me about any choice or preferred seat, basically assigned me that last seat and couldn’t even answer if it was a business class seat. Also iberia lost my suitcase on my flight from JFK to MAD with the layover in BCN. Useless customer service at the counter. Thank goodness I happened to check the baggage claim area of the next flight in…there it was.

Disaster. Downgraded. Zero apology. No effort or coordination between gate and crew. Awful seat blocked by door emergency slide box. Iberia is a mess. App never works. Avoid this airline.

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

The flight was excellent in World Travellor plus. Well worth the extra money. Boarding at Phoenix was the usual poorly organized event. Very stressful.

Although business class, the seating was really cramped. The food was so so.

Smooth trip no turbulence which is always a bonus for me lol! In cattle class so an element of being a bit squished (but not as bad as other shorter haul airlines) smaller plane than the one we flew out on and entertainment system wasn’t as modern but still definitely passed the time. Lovely crew x

Flying on the Boeing 787 from Seattle to London was everything that I expected. Every thing was great.

Seat pitch is not enough to eat comfortably. When seat in front is reclined, your screen comes closer to your face. Ryanair seats are actually more comfortable.

The leg from Portland to Heathrow was great for a business class ticket. The BA leg from Heathrow to Lisbon was terrible. Basically coach seating with an empty seat between you and next passenger. Absolutely no leg room. Should not have been charged for business class and it was a 3 hour flight.

The flat beds. Other than that, the place was not clean.

Moved me away from my family and refused to fix it.

I have always been pleased with their service. Would not change a thing

Everything you need to know for your flight from Washington, D.C. to the United Kingdom

Cabin class types available on flights to the United Kingdom

Cabin classes available on flights to the United Kingdom. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.