$335 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 5/16. 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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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
London1 stop$704
Edinburgh
Edinburgh1 stop$741
Manchester
Manchester1 stop$694
Birmingham
Birmingham3 stops$764
Belfast
Belfast2 stops$825
Inverness
Inverness1 stop$822
Bristol
Bristol3 stops$807
Aberdeen
Aberdeen3 stops$899
Leeds
Leeds2 stops$783
Liverpool
Liverpool3 stops$761
Cardiff
Cardiff2 stops$753
Newquay
Newquay3 stops$1,009
London
London1 stop$704
Edinburgh
Edinburgh1 stop$741
Manchester
Manchester1 stop$694
Birmingham
Birmingham3 stops$764
Belfast
Belfast2 stops$825
Inverness
Inverness1 stop$822
Bristol
Bristol3 stops$807
Aberdeen
Aberdeen3 stops$899
Leeds
Leeds2 stops$783
Liverpool
Liverpool3 stops$761
Cardiff
Cardiff2 stops$753
Newquay
Newquay3 stops$1,009

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, May 10 - Tue, May 19
Icelandair Logo
8:30 pm - 11:55 am
BWI
-
LHR
10h 25m
1 stop
Icelandair Logo
1:05 pm - 10:15 pm
LHR
-
BWI
14h 10m
1 stop
$704Icelandair
Mon, Sep 14 - Thu, Sep 17
Scandinavian Airlines Logo
8:20 pm - 12:55 pm
IAD
-
LHR
35h 35m
2 stops
Scandinavian Airlines Logo
6:40 am - 5:00 pm
LHR
-
IAD
15h 20m
1 stop
$706Scandinavian Airlines
Tue, Jul 28 - Sat, Sep 12
Multiple Airlines Logo
6:00 am - 10:00 am
BWI
-
LGW
23h 00m
1 stop
Multiple Airlines Logo
2:00 pm - 11:51 pm
LGW
-
BWI
14h 51m
1 stop
$707Multiple Airlines
Sun, May 10 - Tue, May 19
Virgin Atlantic Logo
5:40 pm - 8:50 am
IAD
-
LCY
10h 10m
1 stop
Virgin Atlantic Logo
10:00 am - 3:35 pm
LCY
-
IAD
10h 35m
1 stop
$824Virgin Atlantic
Mon, May 11 - Tue, May 19
SWISS Logo
8:20 pm - 12:35 pm
IAD
-
LCY
11h 15m
1 stop
SWISS Logo
9:15 am - 4:45 pm
LCY
-
IAD
12h 30m
1 stop
$827SWISS
Sun, Aug 23 - Thu, Sep 3
SWISS Logo
8:20 pm - 12:35 pm
IAD
-
LCY
11h 15m
1 stop
SWISS Logo
9:15 am - 4:45 pm
LCY
-
IAD
12h 30m
1 stop
$830SWISS
Sun, May 10 - Tue, May 19
Air Canada Logo
4:20 pm - 10:00 am
DCA
-
LHR
12h 40m
1 stop
Air Canada Logo
9:30 am - 3:39 pm
LHR
-
DCA
11h 09m
1 stop
$834Air Canada
Wed, May 27 - Fri, May 29
JetBlue Logo
11:35 am - 6:30 am
DCA
-
LHR
13h 55m
1 stop
JetBlue Logo
8:40 am - 2:43 pm
LHR
-
DCA
11h 03m
1 stop
$836JetBlue
Sun, May 10 - Tue, May 19
Air Canada Logo
4:20 pm - 10:00 am
DCA
-
LHR
12h 40m
1 stop
Air Canada Logo
9:30 am - 3:39 pm
LHR
-
DCA
11h 09m
1 stop
$842Air Canada
Mon, May 11 - Tue, May 19
Virgin Atlantic Logo
6:10 pm - 8:50 am
IAD
-
LCY
9h 40m
1 stop
Virgin Atlantic Logo
8:25 am - 3:35 pm
LCY
-
IAD
12h 10m
1 stop
$850Virgin Atlantic
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 $750 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 $781.

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 $820 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 $856.

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 $984, 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 February, when tickets cost $648 (return) on average. On the other hand, the most expensive months are June and December, when the average cost of round-trip tickets is $1,069 and $951 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, Wednesday is the cheapest day to fly and Tuesday 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 17% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$341
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 12% 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.

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 9680 reviews
7.7Boarding
6.6Food
8.1Crew
7.1Entertainment
7.3Comfort
Airline reviews

Vegetarian selection could be better. Bread was too hard to chew.

8.0 ExcellentAnonymous, Apr 2026
IAD - FRA
Read more United Airlines reviews

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

After arriving in Chicago, we were taxiing for 1.5 hours with infrequent and untruthful updates about the amount of time it would take to arrive at the gate. Minimally, the team could have provided timing expectations that were more truthful, especially one their original expectations were not met.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

OK overall. Flight was delayed Crew on flight was good

Late late late. Delayed and arrived an hour late for a 1 hour 45 minute connection. Every time. Poor record for this company. I try to fly any other carrier first.

This was the smoothest flight I've ever taken with any airline, including Aer Lingus. Typically, there are moments when I feel afraid, but from take off (miraculously seamless!) to cruise, to landing this was a perfect flight. Thank you!

Poor. Plane left EWR late hence missed connecting flight in Dublin. No pro active info from flight staff on connection, only when probed a couple of lies on where we would dock, and on lilelyhood catching connecting flight. Lies as they will have known our EWR-DUB would be parked furthest away from the transit spit - lying it would be next to the AMS flight.

The crew was friendly. The plane was comfortable. In-flight wifi didn't work well at all. The ride was quite turbulent but understandable given the weather.

I flew economy class. Seats were very good and the crew was excellent

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!

Punctual, smooth flight. Crew excellent and cabin very clean. Paid for WiFi but once you close out you cannot get back in even if you paid for entire flight.

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

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.

Incoming flight was delayed, delaying boarding. It then took 30 mins to take off. Took 20 mins to get to a gate because they changed the gate last minute, crew weren’t ready so there was no one staffed to work the jet bridge. Boarding was so disorganized as is usual with American because everyone just stands around the gate regardless of boarding group.

Delays with no explanation. It could have been handled better.

Flight delay for mechanical. Inbound arrived on time. No one said why mechanical delay.

Flight boarded, departed and landed on time. Excellent service from flight attendant in FIRST

This was one of the most frustrating travel experiences I've had to date. I had changed my flight day of to this one as it was slated to depart on time. It ended up being so delayed that my original flight took off before this one did. The boarding process began but eventually stopped and everyone had to get off the plane as a problem was identified. The person at the front desk just tried to laugh it off as if this wasn't already a huge inconvenience. From there, we eventually got to board only to sit at the gate for an additional hour because of some additional issue. This was extremely frustrating and caused a lot of stress.

It was a little concerning to hear the ground crew arguing with the flight crew over baggage space. Instead of taking them and checking them, they started checking for space in the first class cabin moving items around like the flight crew didn't know what they were doing. I was embarrassed for them.

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

I am not going to fillo this out for each leg of my trip. My first review holds for the experience

I had no idea that my ticket only paid for my right to get on the plane. They charged me $130 for my carry-on bag because it was 1 inch too big she claimed but it wasn’t! Then they wanted another fee for everything. I had no idea that Icelandair had changed to such a bargain basement airline. I was very disappointed.

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

Second time with Saga Premium, everything was fab, but the entertainment centre on both my flights didn't work, plus the seat on the NY to Rek flight (Airbus) was so solid and so uncomfortable. The 737Max flight's seat was much, much better.

Waiting area on top of stairs before Boarding the bus wasn’t great. Took a long time to load the bus to gate.

Nice, quick flight. There were lots of empty seats so they told me I could sit next to the emergency exit where I would have more legroom.

The staff was kind and helpful. There was no food, and you needed to bring your own earphones to use the entertainment, which I didn’t know.

They wouldn’t check in my luggage even though I had one checked bag prepaid. So I took my bag to the gate and tried to check it in there and two employees scolded me for bringing a large bag to the gate. I told them I was trying to check it in and that it was prepaid, and they said they couldn’t guarantee that it would arrive at my destination but they finally let me drop it off when boarding the plane and pick it up right after exiting the plane. There was no food, and there was no entertainment.

The customer service was unbeatable from the wheelchair assist team to the flight attendants. The pilot also did an excellent job managing the turbulence.

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

The whole experience was excellent, O can say out from Miami the best airline to travel with for any European destination. Since the ground staff to the inflight crew attention was great, service on board 10 of 10. Finally the 380 is very confortable and nice to travel.

All crew except 1 were excellent. When I asked assistance with business class seat conversion to a bed (not being familiar as never used before but have numerous times with other airlines) crew member helped very reluctantly. I should have told her that business class seat conversion is totally different in each airline such as Delta, New Zealand Air and United. Sorry it was my 1st time with America Airlines. Now I know, I won't bother asking assistance in future.

The seats in Premier Economy were very comfortable. The food was better than average. The way British Airways handled our seating was atrocious.

Flight delayed, connection was not at gate listed and so missed, staff were rude at Heathrow, phone tree stupid and difficult, took me 21 actual hours to reach my destination. Almost lost my hotel reservation after walking in a strange city alone after midnight because they would not put me up in a hotel at sfo or heathrow. I will never fly BA again and will tell all people and Instagram followers never to fly BA.

Overall ok. Best part has always been the sundae dessert.

I’ve never been on a trans-Atlantic (or Pacific) flight where the seats don’t recline—not even a little. I asked my seat mate when BA starting doing this and he said “Oh, a few years ago.” I couldn’t sleep, with my head falling forward waking me continuously, and came off the plane incredibly stiff. I booked a Premium Economy seat to get a more comfortable seat, which was worse than most basic Economy seats I’ve ever booked.

Nice aircraft. Good crew. Delayed departure from Houston, but arrived on time in London. Main thing I don’t like about flying BA is having to transit through security in London Heathrow. A major pain!

The gate agent made me check my carry-on in Denver, even though I've traveled all over taking this case on the plane. Beware folks. Food in Premium Economy was quite good - excellent blanket! Flight attendants on the Heathrow-to-Budapest flight on 3-27-2026 were quite snappy. I got a frown when asked to unscrew the water bottle cap for me (I had a cast on my right arm). Also woke up right when they were handing out biscuits. She had given my rowmates one and was in the process of giving water when I asked for a biscuit. She scolded me and said, "You snooze, you lose". She did give me one, but I thought that comment was uncalled for.

Wish the food and overall service was better. They treat Business class passengers same as economy

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.