DCA - LHR

$319 Find Cheap Flights from Reagan Washington National Airport to London Heathrow Airport

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 Heathrow departing on 9/26. 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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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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Cheap Flights from Reagan-National to Heathrow

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

Recent round-trip flight deals from Reagan-National to Heathrow

KAYAK's recommended round-trip deals from the most popular airlines that fly from Reagan-National to Heathrow.
Discover the best prices for you by selecting your travel dates on KAYAK.
JetBlue Logo
10:00 am - 6:30 amDCA-LHR
15h 30m1 stop
JetBlue Logo
8:25 am - 8:51 pmLHR-DCA
17h 26m1 stop
$598JetBlue
Find Deal
Mon, Sep 22 - Thu, Sep 25
 Logo
9:40 am - 6:30 amDCA-LHR
15h 50m1 stop
 Logo
9:30 am - 7:44 pmLHR-DCA
15h 14m2 stops
Wed, Sep 10 - Tue, Sep 16
Air Canada Logo
12:55 pm - 6:30 amDCA-LHR
12h 35m2 stops
Air Canada Logo
8:45 am - 7:42 pmLHR-DCA
15h 57m2 stops
$622Air Canada
Find Deal
Tue, Aug 12 - Tue, Aug 26
Air Canada Logo
4:35 pm - 11:50 amDCA-LHR
14h 15m2 stops
Air Canada Logo
6:50 am - 3:51 pmLHR-DCA
14h 01m2 stops
$629Air Canada
Find Deal
Mon, Sep 22 - Tue, Sep 30
United Airlines Logo
6:00 am - 8:40 pmDCA-LHR
9h 40m1 stop
United Airlines Logo
9:30 am - 3:48 pmLHR-DCA
11h 18m1 stop
$638United Airlines
Find Deal
Mon, Aug 4 - Tue, Aug 26
British Airways Logo
6:30 am - 9:40 pmDCA-LHR
10h 10m1 stop
British Airways Logo
1:10 pm - 8:16 pmLHR-DCA
12h 06m1 stop
$652British Airways
Find Deal
Tue, Aug 12 - Thu, Aug 21
United Airlines Logo
6:00 am - 8:40 pmDCA-LHR
9h 40m1 stop
United Airlines Logo
3:20 pm - 9:36 pmLHR-DCA
11h 16m1 stop
$698United Airlines
Find Deal
Sat, Sep 13 - Fri, Sep 19
British Airways Logo
3:13 pm - 7:40 amDCA-LHR
11h 27m1 stop
British Airways Logo
8:25 am - 1:53 pmLHR-DCA
10h 28m1 stop
$702British Airways
Find Deal
Fri, Sep 12 - Fri, Sep 19
Iberia Logo
12:35 pm - 8:25 amDCA-LHR
14h 50m2 stops
Iberia Logo
10:50 am - 11:07 pmLHR-DCA
17h 17m2 stops
$791Iberia
Find Deal
Wed, Jun 4 - Wed, Jun 11
Iberia Logo
2:54 pm - 6:20 amDCA-LHR
10h 26m1 stop
Iberia Logo
5:00 pm - 11:11 pmLHR-DCA
11h 11m1 stop
$809Iberia
Find Deal
Sun, Jul 20 - Fri, Aug 1
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KAYAK's insights & trends for Reagan-National to Heathrow flights

Get data-powered insights and trends into flights from Reagan-National to Heathrow 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 Heathrow Airport?

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

When flying from Reagan Washington National Airport to London Heathrow Airport, you should consider leaving on a Tuesday and avoid Sundays if you are looking for the best rates. For your return to Reagan Washington National Airport, you’ll find the best rates on Saturdays and the most expensive ones on Sundays.

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

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 Heathrow Airport, 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 Heathrow Airport is October, where tickets cost $636 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $994 and $967 respectively.

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

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 Heathrow Airport, 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 Heathrow Airport, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonFebruary
High seasonApril
Cheapest flight$319
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 7% lower on average.
Flight from Reagan Washington National Airport to London Heathrow Airport

When to book flights from Reagan-National to Heathrow

Are your dates flexible? Find out the best times to travel from Reagan-National to Heathrow 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 Heathrow Airport flights

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport was $319 for a one-way ticket and $598 for a round-trip.

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

    Yes, you’ll need a passport to travel to London Heathrow Airport from Reagan Washington National Airport.

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

    On your way to London Heathrow Airport, you’ll fly out from Washington, D.C. Reagan-National. You’ll be landing at London Heathrow.

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

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

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

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Reagan Washington National Airport and London Heathrow Airport, with SkyTeam 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 $832 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $830 and an overall rating of 7.4.

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

    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 Heathrow Airport.

  • 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 Heathrow Airport?

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

    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 Heathrow Airport with an airline and back to Reagan Washington National Airport with another airline. Booking your flights between Reagan Washington National Airport and LHR can sometimes prove cheaper using this method.

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

    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 Heathrow Airport from Reagan Washington National Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top 5 airlines serving from Reagan-National to Heathrow

 
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 Heathrow? 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 8702 reviews
7.3Comfort
7.1Entertainment
6.6Food
8.1Crew
7.7Boarding
Airline reviews

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.

2.0 MediocreJane, May 2025SFO - LHR
Read more United Airlines reviews

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.

Fight was delayed an hour due to operational issues ,then further delayed due to ground control for a total of about 1.30 hours. Salad was completely frozen and flatware was so cold you could barely handle it. Crew was friendly and professional and the flight was smooth. The aircraft was clean and well-serviced.

I completely missed my flight because the first leg was longer than planned. I had to sleep overnight in the airport because no accommodation was provided and then sent to Trinidad in the morning with an anticipated 7 hour layover before my flight to Georgetown which was now with Caribbean Airlines. I tried twice with customer service to see if they could put me on an earlier flight which had seats available but was told it wasn’t possible.

First class felt like economy, seats were horrible, food was horrible, staff inattentive

Excellent from start to finish. All staff members were amazing!

Excellent. Although they used to greet me as a mosaic member and provide a free drink, early boarding helps me to keep coming back to JetBlue.

Cancelled flight with no specific instructions to get a boarding pass for another flight. The whole flight of people were in line for an hour because there was only 1 person to help at the desk. This was unusual for JetBlue.

It was too hot in the cabin. The AC did not help.

Except for the 28 minute delay leaving and the earlier reschedule to a later takeoff time the flight was good.

Loved the leg room and tvs screens on the seats and free WiFi. Wish the price was lower and could save by rebooking

No music app working: no economy meal on five hour flight; hour on tarmac at the end waiting for a gate. Flight itself was smooth and easy.

It took 1-1/2 hours to get our luggage after we landed. That to me is unacceptable

The flight was delayed for 4 hours. Once onboard the crew was wonderful.

Overall was excellent. Will definitely us JetBlue in the future.

Pitch was very small. Knees were on the seat back in front of me.

really bad they refused to check in luggages that I had purchased, even showing them the transaction receipt from british airways app the staff in miami was MEDIOCRE

Crew was great and responsive. Entertainment quit working with about 4 hours remaining on the flight. My seat cushion was broken.

Not very good , the stewardess were unfriendly and they don't like to be bothered. Cos was a night flight and they need to sleep.

British Airways staff are very polite and willing to help.

Wonderful as usual except for other guests that were unruly and not kept in check by the Crew.

The flight was initially delayed, then cancelled. American Airlines says the cancellation was weather related, though the actual weather was not bad in both Washington and Providence and between. There were very few cancellations that day. In fact, AA2120 from Washington, DC to Boston flew with a minor delay at about the same time. So, the weather somehow affected only this particular flight AA5230. The next available flight was the following morning. The American Airlines refused to reimburse accommodation (hotel at DCA)

Fine. On time, cabin service was fine, bag arrived. All good. Flying into DCA so did not collide with any helicopters, which is also good. Horrid incident that could have and should have been prevented.

Good experience but the snacks are not gluten free, so I cannot eat them.

Standard. No different than a discount carrier on a short trip.

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.

The people are great! The trip to Japan is simply never ending!!! Not the problem of the airlines, though.

We were forced to check in our carryon and were given a green label that said to pick it up when exiting the airplane. We were told by the flight attendant to pick it up at the carrousel instead. We spent more than 40 minutes looking for the carryon which appeared at the wrong carrousel. There was no agent at the united desk for help. There was no entertainment.

Confusing with Air Canada and United flight, it was a hell, no help, rude people there, stressful environment

Overall the new aircraft’s is good and crew is good. Just overall airline policies and process needs to be better.

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

I paid for business class…. And was counting on the usual packet of toilettes to be provided. They were not because not enough were brought on the plane so they could t give to some and not all. So no tooth brush nor eye cover. Then NO coffee since there was no hot water. The lay I er too short because of delays and my luggage didn’t make the next flight!! It is now a day later and I am awaiting to hear if my bag has arrived. Very inconvenient!. I suppose I need to be glad that I spend over $4000 since I doubt those in coach or premium economy even made that next flight..Heathrow is the worst.

The flight from Seattle was delayed, which made me miss my connection to Florence. I was re-booked NINE HOURS LATER!!! That’s basically a vacation day lost. British Airways needs to partner with other airlines when possible to get a more realistic travel time, if delays occur. I realize there aren’t many flights to Florence from London, so I would book differently were I to return. The actual flight from Seattle was very comfortable and the crew was great, no faults there. I enjoy British Airways, this was an anomaly.

The crew could not have been more helpful, my meal was excellent, I slept peacefully until right before landing, and the BA lounge was a godsend. The only negative I encountered was the coffee both on the plane and in the lounge. Not to my taste but that’s a personal preference.

I don’t understand why a reputable airline like BA would delegate their London flights to AA. Makes no sense to me, as most domestic carriers do such a poor job these days. Terminal 3 at LHR is a total dump

Cancelled flight minutes before boarding. Rescheduled flight was two days later

The flight attendants were EXTREMELY personable and appreciated the service, lights going off after dinner (probably the norm, but I haven’t flown evening overnight flights in a while). Thank you!

Business class seats were very dated on my plane. Very little storage, charging ports were not easily accessible, tv screen kept flopping away. Vegetarian food was disappointing: hardly any protein and severely under-seasoned. Crew was lovely.

The food was ok, but not great. They delayed boarding in Portland and did not enforce group boarding. But the crew was excellent, went above and beyond.

The food was pathetic. There wasn't much leg room and recline space for such a long flight. No tea/ coffee for a 2-3 hour connecting flight without purchasing! Really!?

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