$212 Find Cheap Flights from Washington, D.C. to the United Kingdom - 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 Washington, D.C. to the United Kingdom departing on 9/1. 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$625
Edinburgh
Edinburgh1 stop$667
Manchester
Manchester1 stop$686
Birmingham
Birmingham3 stops$714
Belfast
Belfast1 stop$748
Inverness
Inverness2 stops$819
Bristol
Bristol2 stops$746
Aberdeen
Aberdeen3 stops$873
Leeds
Leeds3 stops$762
Liverpool
Liverpool3 stops$750
Cardiff
Cardiff2 stops$755
Newquay
Newquay1 stop$968
London
London2 stops$625
Edinburgh
Edinburgh1 stop$667
Manchester
Manchester1 stop$686
Birmingham
Birmingham3 stops$714
Belfast
Belfast1 stop$748
Inverness
Inverness2 stops$819
Bristol
Bristol2 stops$746
Aberdeen
Aberdeen3 stops$873
Leeds
Leeds3 stops$762
Liverpool
Liverpool3 stops$750
Cardiff
Cardiff2 stops$755
Newquay
Newquay1 stop$968

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

Sun, Oct 4 - Wed, Oct 7
Scandinavian Airlines Logo
8:20 pm - 8:55 am
IAD
-
LHR
31h 35m
2 stops
Scandinavian Airlines Logo
6:40 am - 5:00 pm
LHR
-
IAD
15h 20m
1 stop
$625Scandinavian Airlines
Sat, Oct 17 - Mon, Oct 19
Scandinavian Airlines Logo
8:20 pm - 4:25 pm
IAD
-
LHR
15h 05m
2 stops
Scandinavian Airlines Logo
6:40 am - 5:00 pm
LHR
-
IAD
15h 20m
2 stops
$626Scandinavian Airlines
Thu, Aug 13 - Wed, Sep 2
Multiple Airlines Logo
1:32 pm - 10:00 am
IAD
-
LGW
15h 28m
1 stop
Multiple Airlines Logo
2:00 pm - 4:07 pm
LGW
-
IAD
31h 07m
1 stop
$627Multiple Airlines
Sun, Sep 6 - Mon, Sep 14
Icelandair Logo
8:30 pm - 11:55 am
BWI
-
LHR
10h 25m
1 stop
Icelandair Logo
9:25 pm - 7:25 pm
LHR
-
BWI
27h 00m
1 stop
$646Icelandair
Fri, Oct 23 - Sun, Nov 1
Icelandair Logo
8:30 pm - 11:55 am
BWI
-
LHR
10h 25m
1 stop
Icelandair Logo
8:35 pm - 6:40 pm
LHR
-
BWI
27h 05m
1 stop
$650Icelandair
Mon, Nov 16 - Tue, Nov 17
JetBlue Logo
6:25 am - 8:45 pm
DCA
-
LHR
9h 20m
1 stop
JetBlue Logo
12:20 pm - 10:48 pm
LHR
-
DCA
15h 28m
1 stop
$688JetBlue
Sat, Oct 31 - Tue, Nov 3
Air Canada Logo
6:55 pm - 8:30 am
DCA
-
LHR
33h 35m
1 stop
Air Canada Logo
6:50 am - 3:24 pm
LHR
-
DCA
13h 34m
2 stops
$733Air Canada
Wed, Oct 28 - Fri, Oct 30
Air Canada Logo
8:45 pm - 11:20 am
DCA
-
LHR
10h 35m
1 stop
Air Canada Logo
9:00 am - 10:38 pm
LHR
-
DCA
17h 38m
2 stops
$744Air Canada
Sun, Aug 16 - Tue, Sep 1
JetBlue Logo
5:00 pm - 9:35 am
DCA
-
LGW
11h 35m
1 stop
JetBlue Logo
12:20 pm - 7:09 pm
LGW
-
DCA
11h 49m
1 stop
$748JetBlue
Tue, Dec 1 - Thu, Dec 3
Lufthansa Logo
6:00 pm - 5:40 pm
IAD
-
LCY
18h 40m
1 stop
Lufthansa Logo
9:50 am - 8:05 pm
LCY
-
IAD
15h 15m
2 stops
$825Lufthansa
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 5 days was to London, at $431 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 5 days was $431.

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

The average price for all round-trip flights from Washington, D.C. to the United Kingdom depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to the United Kingdom is generally in the evening, when round-trip flights cost $867 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 at night, which is peak travel time and where the average cost of a ticket is $933.

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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 3 stops layover the cheapest option at $1,080 on average.

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 February, when tickets cost $663 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $1,260 and $1,050 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 Friday, 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. 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 2 weeks before departure, which saves you about 12% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Good to know

Low season

January

Cheapest flight

$212
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly with an average 20% increase in price.
Flight from Washington Dulles Airport to Edinburgh

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.

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 10026 reviews
8.1Crew
7.1Entertainment
6.6Food
7.7Boarding
7.3Comfort
Airline reviews

1. Everything was satisfactory concerning the flight. 2. Can't think of what could be better right now.

8.0 ExcellentAnonymous, Jul 2026
IAD - YYZ
Read more United Airlines reviews

1. Everything was satisfactory concerning the flight. 2. Can't think of what could be better right now.

Onboard staff was courteous, helpful, responsive and friendly. The boarding process was disorganized, poorly communicated, and disheveled. Gate agents were yelling instead of using the PA system, didn’t communicate the timing delay of our flight, and created an atmosphere of chaos rather than order and communication. As far as I know, there was no reason for their. I would hate to see how it operated under extreme conditions. I’ve never seen United Airlines operations in such a state.

The flight did not have its customary snacks during the flight. Apparently they were never loaded on the plane.

Worst service- attendants dont want to help and sat us in front of bathroom

We sat on the hot plane for ours with very conflicting messages. Some (most?) of this may be due to the flight control staff, but we were also repeatedly getting "we are leaving"/"we are not" messages. It was very uncomfortable

Staff could’ve been a little more cordial. The men were much more friendlier than the women. My daughter and I also missed the 2nd to last meal as we were sleeping but that is on us.

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

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

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.

UK Based crew was great. Very friendly and quick. The seats are just too tight and not comfortable. The plane appeared quite old. Food is better on other non-USA based airlines.

No snacks, drinks or coffee. No entertainment, not comfortable seats

Air Lingus was in no hurry to get us on the plane as sat at the gate a long time before they boarded us. Then they leave us on the tarmac for an hour. They were no help to let me know what I needed to do to get home. I had to navigate London Heathrow with 0 help from them.

There was a 6h delay with limited updates . When we got to Manchester the bus took ages to get to arrivals and we missed our train, dinner reservation. Basically lost a whole day due to arrivals Lingus!!

Great. Has a problem with DOB. Fixed 4 us. Led to a 5 hour earlier flight to London!

Flight crew was superb. Meal was one of the meals at altitude I’ve had

Couldn’t check In online, message was couldn’t check in until Sunday morning though plane left Saturday night. Checked in okay at airport but caused slot if stress.

Amenity kits were never handed out. There was zero friendliness and assistance by crew. Food was uneatable. One drink was offered and no wine, with dinner or before or after. Cocktails and beverages were not encouraged and when I asked for water, none was given. Poorest, most cramped business class flight I’ve ever been on.

I fly to the USA every 6wks on Ave and 99% of the time I fly Aer Lingus. If I fly BA I’m always disappointed. My only criticism is the food. I’m vegan and over the last year it’s got slightly better these last couple of flights but on the whole it’s not good! Salad and fruit salad for breakfast and that’s also the starter and desert for the lunch/dinner and the main is usually rice with fried veg 😳the pasta is pretty good though. That’s been the last 2 meals…. Everything else is fantastic.

The flight was half full and I presume that the next few days are even less busy not sure why they are still charging a premium to change a flight.

The only problem was there are games on the entertaiment system. The guy behind me played poker the entire time and poking the back of my seat. I hope they remove these.

They cancelled our flight two times after rebooking us for a later flight. We never got on the plane. We found another solution by driving.

Mostly great. Only issue was with the WiFi. Halfway through the flight it was spotty and I was unable to work as I planned. This impacted my work products as I am traveling for business and it was an unexpected hindrance which was inconvenient. Flight here was amazing. For a 5 hour flight something more than a Biscoff would be nice but I’m just swinging at windmills I guess…

Delayed boarding because a flight attendant couldn't find the gate...sat on the plane for over an hour at the gate because AA couldn't get one of the planes behind us to move

The seats were extremely cramped, with very little legroom or personal space. There was no room left in the overhead bins for a backpack, and the space under the seat in front was so limited that I could barely fit my bag underneath. Overall, the seating arrangement felt very uncomfortable and overcrowded.

As always, most AA flights that we fly are almost ALWAYS delayed and that too multiple times. Very frustrating

The small flights with Valet Luggage has a poor service

Overall a good experience, however Wifi was not working on the flight.

THe flight was an hour late. You got us on the plan and we sat on the ground for 45 minutes with no information from the pilot whatsoever. Worst flight this year.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

Human interaction. Thought there would be more service-even a smile would have been nice.

The ticket was reserved in my name but not paid for by underpricer. Alaska airlines was unable to issue my ticket (could not connect the ticket with the PNR) due to an error with underpricer and I spent the better part of 2 hours at the ticket counter trying to rectify.

Damage May baggage and I report the airport agant and they see it

Crew was very friendly. Need lay flat beds! More snacks

Screen didn't work, and neither did the button to tilt the seat even though the seat was comfortable

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.

The flight was delayed and as a consequence we missed our connecting flight. Were stuck for another 6h in Reykyavik. Appreciated that we got a generous food voucher at least. Would have liked to see more information upon arrival including a person waiting for connecting flight travellers and informing already that we will not catch the flight and directing us to the office dealing with the matter; unfortunately that didnt happen and we hence first needed to find out whether flight had indeed left already and then locate the adequate office to help us with booking us on the next connecting flight. Also my suitcase broke and it is not clear whether it is happened on the leg with Iceland Air from DC to Reykyavik or on the leg with Lufthansa from Reykyavik to Frankfurt. Finally, understood that it is a low cost company but at least provision of earplugs for free would have been nice, instead of making them buy.

Had a screaming child next to us. Not the airline’s fault but still annoying.

Seats are way too much now with these new airplanes especially long flights like we had. I was 7 month pregnant and in a lot of discomfort due to small seats.

My biggest problem was the flight from KEF to DUB was delayed, which caused me to miss my connecting flight in DUB and we were forced into an unplanned 10-hour layover in DUB. Crew and boarding staff were all very friendly but this was a real inconvenience and especially uncomfortable for my disabled wife.

The seat size was more like a domestic than an international flight. In fact, i would compare the ammenities, quality and service to a short hall ryan air flight, which was unexpected for an international flight. The plane was extremely hot so sleeping was difficult. My biggest complaint was that they are very strict on carry on luggage only allowing it to weigh 10kg/22lb. I try to limit myself to a carryon so i don't have to mess with bagage claim, but the wieght restriction made it impossible. I have never had a carry on weight restriction (at least enforced) on an international flight. Will not be including them in future searches.

Horrible… I was downgraded without notice, had to sit in economy and given my back injury was in pain most of the journey. I expect to be reimbursed for this inconvenience and after my return flight home, I never plan to fly with British Airways again.

I like the crew, very welcoming. Food can be better. The seat arms don’t go up so. I could use the empty seat next to mine to relax better. 3hrs delay 😠

I enjoyed the comfort of Premium Economy. The Purser on London-Nairobi was a little testy, snappish in his tone. I understand stressed, tired, etc but his tone in addressing passengers I found wanting.

The flight was delayed twice and because of that, we missed our connecting flight. British Airways then attempted to put us on the last flight to Milan from London which would have kept us in the airport for 12 hours. We had to speak to several levels of bureaucracy until BA management let us fly on a flight that only kept us in the airport for two hours. If there was an earlier flight, why weren’t we put on that flight from the start? Unacceptable behavior from what was once my favorite carrier.

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

Nice flight, attentive crew, soft landing by the Pilot,, comfortable seat.

Service was very good. Because I use a cane, I was allowed to use Priority Boarding. Biggest problem was extremely limited leg room in Economy class seats. For airplane food, it was alright.

Great job notifying of 30 minute delay in departure. Fabulous job making up for the time and arriving as scheduled. Air travel is just no fun anymore with the extreme overcrowding, and someone needs to come up with an innovative plan for loading and unloading passengers (load all window seats first, middle seats second, aisle seats last?). Great job getting the luggage on the carousel in record time!

One frustration after another. No gate personnel until very close to departure. Boarding procedure was chaos. Plane was dirty from previous transatlantic flight. Entertainment system not operational. Gate change for connecting flight which required another round of security clearance, almost causing a missed flight. The final blow was lost baggage upon arrival.

Nothing. BA flight was late. Missed connection and lost luggage. A disaster.

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.