DCA - LON

$273 Find Cheap Flights from Reagan Washington National Airport to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Reagan-National to London departing on 9/28. 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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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to London.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to London.
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Flight Deals

Cheap Flights from Reagan-National to London (DCA-LON)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Reagan-National to London 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 Reagan-National to London

Wed, Oct 1 - Wed, Oct 8
British Airways Logo
1:39 pm - 8:10 amDCA-LGW
13h 31m1 stop
British Airways Logo
3:05 pm - 10:57 pmLGW-DCA
12h 52m1 stop
$539British Airways
Find Deal
Sun, Nov 23 - Wed, Nov 26
 Logo
12:55 pm - 7:10 amDCA-LHR
13h 15m2 stops
 Logo
11:10 am - 9:56 pmLHR-DCA
15h 46m2 stops
Wed, Nov 26 - Sun, Nov 30
Air Canada Logo
12:55 pm - 7:10 amDCA-LHR
13h 15m2 stops
Air Canada Logo
6:50 am - 3:31 pmLHR-DCA
13h 41m2 stops
$552Air Canada
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Wed, Sep 24 - Wed, Oct 1
American Airlines Logo
3:35 pm - 8:10 amDCA-LGW
11h 35m1 stop
American Airlines Logo
3:05 pm - 11:07 pmLGW-DCA
13h 02m1 stop
$559American Airlines
Find Deal
Sun, Sep 21 - Tue, Sep 30
United Airlines Logo
1:00 pm - 6:20 amDCA-LHR
12h 20m1 stop
United Airlines Logo
9:30 am - 4:22 pmLHR-DCA
11h 52m1 stop
$562United Airlines
Find Deal
Wed, Nov 26 - Sun, Nov 30
Air Canada Logo
11:05 am - 7:10 amDCA-LHR
15h 05m1 stop
Air Canada Logo
6:50 am - 3:31 pmLHR-DCA
13h 41m2 stops
$574Air Canada
Find Deal
Sun, Sep 14 - Tue, Sep 23
United Airlines Logo
7:15 pm - 10:10 amDCA-LHR
9h 55m1 stop
United Airlines Logo
9:30 am - 3:51 pmLHR-DCA
11h 21m1 stop
$585United Airlines
Find Deal
Tue, Sep 16 - Tue, Sep 23
American Airlines Logo
3:35 pm - 8:10 amDCA-LGW
11h 35m1 stop
American Airlines Logo
3:05 pm - 11:07 pmLGW-DCA
13h 02m1 stop
$589American Airlines
Find Deal
Mon, Sep 22 - Wed, Oct 1
JetBlue Logo
6:59 pm - 9:35 amDCA-LGW
9h 36m1 stop
JetBlue Logo
12:10 pm - 8:55 pmLGW-DCA
13h 45m1 stop
$599JetBlue
Find Deal
Wed, Sep 10 - Thu, Sep 18
JetBlue Logo
4:45 pm - 9:35 amDCA-LGW
11h 50m1 stop
JetBlue Logo
12:10 pm - 8:55 pmLGW-DCA
13h 45m1 stop
$614JetBlue
Find Deal

Everything you should know

Top airlines
British Airways
Cheapest • from $539 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 27% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 21% price drop
November
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$539
British Airways
Wed 10/1Wed 10/8
DCA - LGW • 1 stop
Cheapest one-way
$273
Typical prices: $451-508
JetBlue
Sun 9/28
DCA - LHR • 1 stop
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We hope you love your trip to London!
Booking Insights

KAYAK's insights & trends for Reagan-National to London flights

Get data-powered insights and trends into flights from Reagan-National to London to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Reagan Washington National Airport to London?

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

For Reagan Washington National Airport to London, Tuesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from London back to Reagan Washington National Airport, the best deals are generally found on Saturday, with Sunday being the most expensive.

What is the cheapest month to fly from Washington, D.C. Reagan-National Airport to London?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Reagan-National Airport to London, 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. Reagan-National Airport to London is February, where tickets cost $605 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $991 and $979 respectively.

How far in advance should I book a flight from Washington, D.C. Reagan-National Airport to London?

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. Reagan-National Airport to London, 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. Reagan-National Airport to London, you should book around 2 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$273
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Reagan Washington National Airport to London Heathrow Airport

When to book flights from Reagan-National to London

Are your dates flexible? Find out the best times to travel from Reagan-National to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Reagan Washington National Airport to London flights

  • What is the cheapest flight from Washington, D.C. Reagan-National Airport to London?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Reagan-National Airport to London was $273 for a one-way ticket and $539 for a round-trip.

  • Do I need a passport to fly between Reagan Washington National Airport and London?

    A passport is required to fly from Reagan Washington National Airport to London.

  • Which airports will I be using when flying from Reagan Washington National Airport to London?

    On your way to London, you’ll fly out from Washington, D.C. Reagan-National. You’ll be landing in one of London’s 5 airports: London City, London Gatwick, London Heathrow, London Luton, or London Stansted.

  • Which aircraft models fly most regularly from Reagan Washington National Airport to London?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Reagan Washington National Airport to London?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Reagan Washington National Airport and London, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Washington, D.C. to London, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to London are Delta and United Airlines. With an average price for the route of $956 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $857 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Reagan Washington National Airport to London?

    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 Reagan Washington National Airport to London.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Reagan Washington National Airport 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 Reagan Washington National Airport to London?

    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 to London with an airline and back to Reagan Washington National Airport with another airline.

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

    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 to London from Reagan Washington National Airport 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 Reagan-National to London

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Reagan-National to London? 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 8937 reviews
7.7Boarding
7.3Comfort
8.1Crew
7.1Entertainment
6.6Food
Airline reviews

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

8.0 ExcellentTim, Aug 2025IAD - MUC
Read more United Airlines reviews

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

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

Although the flight was delayed the crew and the flight itself were very good. Couldn't fault anything and after the disappointment of being abandoned in the US by BA it was a welcome relief to travel with United

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

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.

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.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

We fly American Airlines quite a bit. And we always fly business class when traveling internationally. We were a bit disappointed with the comfort of this particular plane as well as the entertainment options.

The flight was canceled 3 hours after original take off time

The AA staff person who checked our bags was curt and almost rude. The FA also seemed unhappy doing her job. Overall it was like riding the school bus back in grade school.

Pathetic check in experience at JFK. Everything is self check in. Not enough staff present to help with when the check in process or the kiosk gets stuck. Staff present not welcoming or pleasant at all. On the other hand the NY based flight crew was great. Courteous and friendly throughout the flight. Special meals leave a lot to be desired. Kids meals should be made available when kids are flying and same goes for special kids meals too.

They are still charging me after taking 466 and 833 for round trip from AR to to Bradley airport from 19 to 21. Then poor experience. Am hurt and I will say it on social media. Please stay away from this airline. I see in my bank account they are still taking 644. Am trying to stop it. I used to fly United airlines and I suggest that if you don't want extra charges and good service you go back there. American airlines delayed my flight again and I was late for my meeting, no recompensation but charging me over and over.

They changed our Gate 5 times, and concourse twice. Changed our seats twice.

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

The chicken adobo was a little too spicy but good otherwise. My personal opinion. Movie selection could be improved, too many horror movies. Could add a few more chick flicks! The flight was bumpy at times. We arrived a little early too! Flight attendants friendly.

WiFi was not eorkig (again) And the plane was from 1990 with the screens which were.not touch and most didn’t even work and if lucky could tune in tv

I paid extra for a seat closer to the front. The TV didn’t work at all for the entire flight. Would have been nice to know before I purchased an “upgraded “ seat

It was great. I had never flown on JetBlue before, but would be very happy to fly with them in the future.

Worst flight experience ever flights canceled. JetBlue told us just did not even bother standing in line to come back in one and a half hours then without any information we had to go pick up all of our luggage and spend over $2000 in accommodation just to get home. JetBlue said that the next flight available for us to get home would be three days later. Absolutely absurd hasn’t offered to give us any compensation do not fly JetBlue horrible company. They said it was based on the weather and the weather is great in all locations that we would’ve been flying to total hoax. I think it’s a conspiracy theory.

The captain gave good announcements and the flight attendants were friendly. The WiFi was pretty good. The plane itself looked very old inside and the seats were very uncomfortable. The screens in the seat backs were the smallest I’ve ever seen. There were so many loud and obnoxious kids on this flight and the parents didn’t do much to try to quiet them down. Some had videos and games on tablets with higher than necessary volume going the whole time.

Too many long delays with JetBlue. Worst major airline that serves JFK but unfortunately I keep going back because of the prices.

My JetBlue experience was nice. The flights ran on time, the aircraft was clean and comfortable, and the flight attendants were attentive. My only issue, which is isolated to the low-cost (budget) option at JetBlue, is that the check in process makes the user feel that they have to buy their seats. The seats offered for purchase are upgrades from the budget seats you get (which are essentially the last seats remaining). The interface should not make it feel like you must purchase a seat.

The plane was late to leave.. Internet was lousy. TV was not working. when we arrived, We stayed on the plane for a long time before we got to the gate. It took us a long time to retrieve our luggage because they didn’t know what carousel to send them to. It was a bad experience.

I especially liked the lead crew officer. His boarding and safety announcements were made with a bit of novelty and humor. The flight also left the gate 10 minutes early and we landed about 20 minutes early… It was a delightful flight…

There were mutliple delays. There was inconsistent, delayed, and poor communication regarding the delays.

In flight entertainment system did not work across the whole plane for entire flight. Seats were very cramped. Cabin temperature was freezing cold. Crew was miserable and answered everyone in a short and barking manner. I’ve flown air Canada many many times and never had an issue. But this was unpleasant.

Our flight was canceled at the last minute. Someone on the flight said the exact same thing happened to her the day before. I will say they helped us book a flight on another airline so that we could still make our vacation with little delay.

They screwed up so bad, I asked for a short check for my luggage since we had a 21 hour overnight layover in London at a hotel. They said I have to receive my luggage in London because it’s an overnight layover. Get to London, nope, my bags aren’t coming off they are staying in terminal 5 over night and going straight to Ibiza. So we had no luggage for a whole day and basically stuck with no clothes or washroom stuff. Finally get to Ibiza and my luggage is completely smashed and damaged and missing a wheel. Now I have to drag this 50 lbs luggage around Ibiza islands for 10 days. Wtf. So pissed off Air Canada is LITERALLY THE WORST AIRLINE IN THE WORLD

Great flight ✈️ I requested a vegan meal and don’t think offering frozen fruit cup for breakfast is a good idea people want something warm or neutral like the muffin but it was cold from being in the paper bag with the frozen fruit 🧐 and unfortunately I didn’t have either and I don’t like wasting food so that was a disappointment. Flight was on time departure and arrival flight crew were good.

From my experience, I see there is room for a greater mixture of cultures, for example, a mix of the nationality of cabin crews, food, music, food, etc.

on time quick service but food so so and seats very small. no leg room. I think passengers should not be bringing so large carry on suitcases and should have free check in. Then boarding and unloading would be faster

After nearly nine years without traveling, my son and I decided to take our first flight, and we chose Air Canada and I’m so glad we did! From start to finish, our experience was nothing short of amazing. The flight itself was smooth, comfortable, and truly enjoyable. The staff were warm, professional, and went above and beyond to make us feel at ease. But what really stood out for me was the luggage tracking feature. Knowing that my bag was scanned onto the same flight I was on gave me such peace of mind. It’s little details like this that make all the difference, especially after not traveling for so long. This trip was incredibly special for us, and Air Canada made it even more memorable. Thank you for such a fantastic experience I wouldn’t hesitate to fly with you again!

The flight was delayed at the last moment quoting an absurd weather reason. This delay led to an issue with my connecting flight. I was made to run (literary) from this flight to the next one ( as they preponed departure. I was still in my DCA to YYZ flight when the boarding started for the next connecting flight. After my sprint to get the connecting flight, found that no place for my carry on. Had to sit for 3 hours with my back-pack on my lap , it was the most uncomfortable and inconvenient journey with little to no empathy shown by cabin crew in both flights. Another poor show from Air Canada!! Cant help because of lack of options !!

Made me check my carry on despite there being dozens of empty bins when I boarded which significantly inconvenienced me.

Was good all around. Crew, food, paid for extra legroom, as 10+ hour flight Like the 787 as I don't have any problem with my ears, due to the planes pressurization.

Didn’t fly with them as someone had cancelled my flight

Online check-in 24 hours in advance something seems not so easy to check in to pick seats and to print a boarding pass

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 😠

Boarding was efficient and quick, crew was very attentive, seats were comfortable.

Everything was very good! I personally struggled with the heat in the cabin for the first 2 hours

Very caring crew on board. Didn’t have dinner as I was sleeping. Was seating in the emergency row so I had comfortable leg room

Had a nice little suite although I couldn’t close the door (but I didn’t ask anyone to help). 5K is a nice seat and very private (you look in on first class). Enjoyable flight and nice crew.

Although the crew were great and the good nice, I might as well have been on Ryanair for the amount of space I had. Not good enough BA. I’d rather pay more and not feel like a human sardine.

Love the A380 - loads of room. Headphone socket on my seat didn’t work. Sounds like a trivial issue? Well when flying long-haul the in-flight entertainment is what keeps you going so when it doesn’t work it’s a disaster. Pay attention to the details please BA. Spoiled what was otherwise an excellent flight with the usual brilliant crew.

Crew were fantastic can’t fault them at all. Couldn’t do enough for us

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