$193 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 7/25. 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 Washington, D.C.

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
London
London1 stop$418
Edinburgh
Edinburgh1 stop$448
Manchester
Manchester1 stop$501
Birmingham
Birmingham2 stops$506
Belfast
Belfast1 stop$622
Inverness
Inverness1 stop$497
Aberdeen
Aberdeen1 stop$608
Bristol
Bristol2 stops$561
Liverpool
Liverpool2 stops$620
Leeds
Leeds2 stops$661
Cardiff
Cardiff2 stops$729
Newquay
Newquay1 stop$693
London
London1 stop$418
Edinburgh
Edinburgh1 stop$448
Manchester
Manchester1 stop$501
Birmingham
Birmingham2 stops$506
Belfast
Belfast1 stop$622
Inverness
Inverness1 stop$497
Aberdeen
Aberdeen1 stop$608
Bristol
Bristol2 stops$561
Liverpool
Liverpool2 stops$620
Leeds
Leeds2 stops$661
Cardiff
Cardiff2 stops$729
Newquay
Newquay1 stop$693

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

 
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

Tue, Aug 19 - Mon, Aug 25
TAP AIR PORTUGAL Logo
10:20 pm - 3:35 pmIAD-LGW
12h 15m1 stop
TAP AIR PORTUGAL Logo
10:35 am - 8:50 pmLGW-IAD
15h 15m1 stop
$418TAP AIR PORTUGAL
Find Deal
Fri, Sep 26 - Mon, Sep 29
TAP AIR PORTUGAL Logo
5:00 pm - 9:45 amIAD-LGW
11h 45m1 stop
TAP AIR PORTUGAL Logo
4:25 pm - 3:20 pmLGW-IAD
27h 55m1 stop
$421TAP AIR PORTUGAL
Find Deal
Tue, Aug 19 - Wed, Sep 10
British Airways Logo
2:54 pm - 8:10 amDCA-LGW
12h 16m1 stop
British Airways Logo
3:05 pm - 10:28 amLGW-DCA
24h 23m1 stop
$480British Airways
Find Deal
Mon, Nov 3 - Mon, Nov 10
Icelandair Logo
7:40 pm - 10:50 amIAD-LHR
10h 10m1 stop
Icelandair Logo
12:15 pm - 6:20 pmLHR-IAD
11h 05m1 stop
$482Icelandair
Find Deal
Wed, Dec 3 - Tue, Dec 9
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:20 pmLGW-IAD
11h 25m1 stop
$483Icelandair
Find Deal
Tue, Aug 19 - Wed, Sep 10
British Airways Logo
2:54 pm - 8:10 amDCA-LGW
12h 16m1 stop
British Airways Logo
11:35 am - 10:28 amLGW-DCA
27h 53m2 stops
$495British Airways
Find Deal
Sun, Sep 7 - Wed, Sep 17
Iberia Logo
3:35 pm - 7:45 amDCA-LHR
11h 10m1 stop
Iberia Logo
6:30 am - 11:07 pmLHR-DCA
21h 37m2 stops
$510Iberia
Find Deal
Mon, Oct 6 - Tue, Oct 14
United Airlines Logo
10:51 am - 6:20 amBWI-LHR
14h 29m1 stop
United Airlines Logo
9:30 am - 2:08 pmLHR-BWI
33h 38m2 stops
$512United Airlines
Find Deal
Mon, Sep 1 - Tue, Sep 9
Iberia Logo
5:30 pm - 7:50 amDCA-LHR
9h 20m1 stop
Iberia Logo
10:50 am - 11:07 pmLHR-DCA
17h 17m2 stops
$512Iberia
Find Deal
Wed, Sep 3 - Thu, Sep 11
United Airlines Logo
10:51 am - 11:45 amBWI-LHR
19h 54m1 stop
United Airlines Logo
8:40 am - 9:42 pmLHR-BWI
18h 02m2 stops
$515United Airlines
Find Deal
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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?

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. to the United Kingdom.

The cheapest ticket to the United Kingdom from Washington, D.C. found in the last 72 hours was to London, at $511 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 $511.

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 2 stops layover the cheapest option at $1,906 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 January, when tickets cost $643 (return) on average. On the other hand, the most expensive months are June and December, when the average cost of round-trip tickets is $965 and $879 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, Tuesday 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 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.


Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$193
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from Washington Dulles Airport 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 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, 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 in the morning, when round-trip flights cost $748 on average. Morning departures are around 11% 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 $836.

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 8849 reviews
6.6Food
7.0Entertainment
7.7Boarding
8.1Crew
7.3Comfort
Airline reviews

We were given vouchers we couldn’t use with a 5.5 hour delay

4.0 OkayHope, Jun 2025IAD - SMF
Read more United Airlines reviews

We were given vouchers we couldn’t use with a 5.5 hour delay

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.

Overall good for an economy fare. IMO the movie selection could be improved. Great that you can now connect bluetooth headphones to the entertainment system.

For a four hour flight, I was disappointed that everything was for purchase except for coffee, tea, or water. The disembarking in Iceland was so inefficient and time-consuming. We landed and stopped in the middle of the tarmac, had to disembark in the rain, and then squeeze into a bus which took us to the airport. Crazy! How does that work in winter?

Paid for a Premium seat...minimal recline, no footrest. Maybe slightly wider than a cheap economy seat. Zero chance of getting any rest on this plane

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. 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.

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

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.

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

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

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

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

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

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

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

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

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

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

It was a wonderful experience with great food, great staff, and no difficulties boarding!

Paid for my seat 4 months ago. Did not pay the extra for specific seat assignment ( never have and never was a problem). Could not electronically check in (found out it was due to overbooking and that unassigned seats get bumped first - never happened to me before). Luckily, did make the flight. Very stressful - would have been extremely disruptive for my travel plans. UK Visa - never notified by Kayak or BA that a visa was required. Had to spend 15 minutes to download and complete app at the flight counter and pay $25, and was told they would let me know in 3 days if I would get it (flight landing in 10 hours from when I completed app). Luckily, visa was approved before landing. Unnecessary stress created here. Food - main meal, curry chicken barely palatable with unrecognizable vegetable. Desert cup, cheesecake, also barely palatable. Salad cup was good. Small water offered only 3 times (before main meal, at main meal, at morning snack) - not nearly enough for long flight.

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

Flight was good but seat in 12D was not comfortable, better on the Airbus 321 from Tampa to Charlotte. No breakfast was served before landing in zLonfon only a coffee and orange juice.

I was transferred to an American Airlines flight. The boarding was late and unorganized. The seating was extremely tight and uncomfortable. Will not use AA again.

The entertainment selection was ok, but overall not bad! The crew was great.

Good crew and boarding process. Horrible food and one of the most uncomfortable aircraft seats I have ever sat in. The cabin temperature was warm which made it hard for my family to sleep.

The check-in of my luggage was terrible. When purchased my tickets, one luggage and one carry-on was part of the fight. My flight was switched from British to American Airline. During check-in of luggage at the airport, I was denied and had to pay extra $75. How do I get reimbursed for this extra luggage payment?

More Indian vegetarian food options would have been better Availability of seat selection free of charge 72 hours before departure would be great

This was the second time on BA, food terrible, bathrooms gross,( granted, that was mostly due to the disgusting children urinating all over it)boarding was late and disorganized. No gate issued until last minute st Heathrow, bad system, caused undue stress. Seats were painful, that's what you get for traveling like a poor in economy, right BA? Should have been able to afford business or first class if you want to actually be able to walk upright without back pain after a trip.

This was the second time on BA, food terrible, bathrooms gross, boarding late and disorganized. No gate issued until last minute st Heathrow, bad system, caused undue stress.

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.

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

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.

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