£234 Find Cheap Flights from London Heathrow Airport to Washington

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Washington departing on 28/10. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Washington

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Washington.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Washington.
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Best Washington Flight Deals from Heathrow

Cheapest return prices found by our users on KAYAK in the last 72 hours
Seattle
Seattle1 stop£234
Spokane
Spokane2 stops£474
Pasco
Pasco2 stops£695
Bellingham
Bellingham2 stops£837
Seattle
Seattle1 stop£234
Spokane
Spokane2 stops£474
Pasco
Pasco2 stops£695
Bellingham
Bellingham2 stops£837

Cheap Flights from Heathrow to Washington

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Washington 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 return flight deals from Heathrow to Washington

Tue, 28 Oct - Tue, 4 Nov
Austrian Airlines Logo
12:05 - 20:54LHR-SEA
15h 49m1 stop
Austrian Airlines Logo
08:00 - 06:40SEA-LHR
14h 40m1 stop
£234Austrian Airlines
Find Deal
Sat, 28 Jun - Tue, 15 Jul
 Logo
06:00 - 14:50LHR-SEA
16h 50m1 stop
 Logo
13:00 - 10:40SEA-LHR
13h 40m1 stop
Wed, 27 Aug - Tue, 9 Sep
KLM Logo
09:55 - 15:55LHR-SEA
14h 00m1 stop
KLM Logo
20:25 - 14:15SEA-LHR
9h 50mdirect
£433KLM
Find Deal
Tue, 9 Sep - Wed, 17 Sep
KLM Logo
09:55 - 16:05LHR-SEA
14h 10m1 stop
KLM Logo
20:25 - 14:15SEA-LHR
9h 50mdirect
£436KLM
Find Deal
Tue, 23 Sep - Tue, 7 Oct
Virgin Atlantic Logo
06:15 - 11:15LHR-SEA
13h 00m1 stop
Virgin Atlantic Logo
17:35 - 11:20SEA-LHR
9h 45mdirect
£439Virgin Atlantic
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Tue, 28 Oct - Tue, 4 Nov
British Airways Logo
11:55 - 21:19LHR-SEA
16h 24m1 stop
British Airways Logo
11:51 - 10:00SEA-LHR
14h 09m1 stop
£444British Airways
Find Deal
Wed, 3 Sep - Wed, 17 Sep
Virgin Atlantic Logo
13:25 - 15:45LHR-SEA
10h 20mdirect
Virgin Atlantic Logo
17:35 - 11:20SEA-LHR
9h 45mdirect
£449Virgin Atlantic
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Wed, 20 Aug - Tue, 9 Sep
Icelandair Logo
13:05 - 17:50LHR-SEA
12h 45m1 stop
Icelandair Logo
15:45 - 11:55SEA-LHR
12h 10m1 stop
£464Icelandair
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Sun, 22 Jun - Thu, 26 Jun
Icelandair Logo
21:25 - 11:25LHR-SEA
22h 00m1 stop
Icelandair Logo
23:30 - 11:55SEA-LHR
28h 25m1 stop
£470Icelandair
Find Deal
Mon, 1 Sep - Mon, 15 Sep
British Airways Logo
15:40 - 17:35LHR-PDX
9h 55mdirect
British Airways Logo
19:25 - 13:00PDX-LHR
9h 35mdirect
£477British Airways
Find Deal
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KAYAK's insights & trends for Heathrow to Washington flights

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

What is the cheapest London Heathrow Airport to Washington flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from London Heathrow Airport to Washington.

The cheapest ticket to Washington from London Heathrow Airport found in the last 72 hours was to Seattle, at £440 return. The most popular route is from London Heathrow Airport (LHR) to Seattle (SEA), and the cheapest round-trip airline ticket found on this route in the last 72 hours was £440.

Can I save money by flying with a stopover from London Heathrow Airport to Washington?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at £1,237 on average.

What is the cheapest month to fly from London Heathrow Airport to Washington?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Washington, 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 London Heathrow Airport to Washington is February, when tickets cost £482 (return) on average. On the other hand, the most expensive months are July and August, when the average cost of return tickets is £750 and £695 respectively.

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

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

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

How far in advance should I book a flight from London Heathrow Airport to Washington?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Washington, 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 London Heathrow Airport to Washington, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.


Good to know - Cheap tickets from London Heathrow Airport to Washington

Low seasonJanuary
High seasonAugust
Cheapest flight£234
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly (26% more expensive on average)
Flight from London Heathrow Airport to Seattle

FAQs - booking Washington flights

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

    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 London Heathrow Airport to Washington.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London Heathrow Airport to Washington is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Heathrow Airport to Washington?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from London Heathrow Airport to Washington 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 London Heathrow Airport to Washington?

    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 London Heathrow Airport to Washington 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 Washington?

    The cheapest time of day to fly to Washington is generally at night, when retur flights cost £698 on average. Morning departures are around 3% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally in the morning, which is peak travel time and where the average cost of a ticket is £881.

Top 5 airlines serving from Heathrow to Washington

 
See real verified KAYAK customer reviews for airlines flying from London to Washington. 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 Heathrow to Washington? 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.
7.8
KLMOverall score based on 1358 reviews
7.1Entertainment
8.4Crew
7.7Comfort
7.8Boarding
7.2Food
Airline reviews

Klm start boarding while somw air issue in the plan

8.0 ExcellentA, Jun 2025AMS - YYZ
Read more KLM reviews

Klm start boarding while somw air issue in the plan

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

You should not have to pay for WiFi in business class

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

I flew premium economy and this was a good option. Although the seats didn’t recline much, I was able to get some sleep with my head propped against the window. The food was good and the entertainment was wonderful The staff were very attentive and professional

They only had vegetarian food left on the flight which I wasn’t happy about. I didn’t get any food to eat at all.

My experience was good overall, the quality of the food really decreased! There used to be a choice between meat and fish now it’s between chicken and pasta! In the choices of entertainment meditation has been added which is very good. Soft chair workout to improve blood circulation and avoid phlebitis should be added.

The only reason the overall rating wasn't "excellent" was due to problems in claiming luggage. The bags are delivered to the main area (Cinta 35) for domestic passengers, but to a DIFFERENT ROOM for international arrivees. After waiting 30 minutes, someone (who didn't appear to be from Air France or the airport) told us to go to another area. There we found our bags, which appeared to have been awaiting us for a while. We had to go through a bag check before leaving the airport. If we had been alerted to this possibility, or better yet, been to go directly to Cinta 34, we could have eliminated quite a bit of waiting.

Much better than the major US Carriers especially in Biz Class.

It was not Air France but Air Europa. But confusion over our checked luggage. Whether it was checked all the way to Tenerife or not. It was not. Had to line up again in Departures. At least our Sky Priority was honoured. Flight was fine.

My wife and I had a row to ourselves after moving seats. There were no TVs and you had to buy food. So we did nothing but had a quick nap. Flight was fine.

The plane was old Only 3 bathrooms available for economy The entertainment was old and the selection was poor

Georgian Airways check in staff initially denied us, because they thought passengers required transit visas to transfer on connecting flights. This required 70 minutes for them to call multiple people to confirm how transfers worked. They did not apologize once accepting our check in. Onboard, the four hour flight gave stale bread with spam slices as lunch. The only included drinks were still or sparkling water.

I did not get my baggage at my final destination..poor coordination with connecting flights with partner airlines (Saudi airways). Also the food was very mediocre.

Not a good one this time. The absence of internet without any information/notification ahead was really the unacceptable part. Also this new A350-900 has a serious legroom challenge for economy seats. It’s more like a medium-haul flight legroom configuration.

Not great , just ok . I expected better food but it did not deliver . Flight staff was ok . The guy at the drop off bag counter was the only saving grace in this whole trip . He was pleasant, friendly and very helpful . You couldn’t ask for a better assistance from him .

Super friendly and helpful staff, from check-in desk to cabin crew.

Following a paid seat upgrade for enhanced comfort, I encountered an unacceptable odor in my assigned area. It took three hours for the crew to relocate me, and the replacement seat was unacceptably close to the lavatory, offering no improvement.

Good overall. Cannot fault the airlines. I have had better entertainment systems before ie ice in Emirates but it was not too bad. Food was decent and staff were friendly.

I did not fly by vergin atlantic from bangalore to vasco da gama

Your flight delayed at Heathrow n I almost missed my mother funeral.you idiots. I had to waste 10 hours in different airports. Thank your stars I'm not suing you.

Miami airport needs more thorough signage. It was a long walk from my transport point to the check in desk,

Flight took off an hour late. Had to stay on the tarmac for half an hour after landing. Both annoying.

We had an unfortunate experience where we had to leave the aircraft after boarding, shortly before the scheduled takeoff time, and re-board. The reason given was that a passenger felt ill and had to cancel their plans and therefor their luggage had to be found and removed.

We’ve used VA before many times the experience is always been good they have lovely staff and the food is always delicious.

Everything about the flight was amazing from check in to boarding entertainment was okay food we didn’t try.

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.

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.

I had an exit row and so was Comfortable on the long flight.

The seats on this airline are sooo small, even for a petite person. I felt like the seat tilted forward and I was fighting to stay in it. The lavatory is horribly small, with a wet floor because the sink is so small you can't help but splash the water all over when washing up.

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.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

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

Booked with Kayak… Economy Class it said. I had filtered for 1 checked bag. Get to boarding and it says I have Economy Light w/ no checked bags. $136 each way for baggage now. Do not use smartfares.com. Very misleading and a terrible start to this trip.

Horrible. The flight was delayed by over 3 hours but updates were barely provided. Boarding started 3 hours late then stopped because their system crashed. So now, passengers were standing for 15 minutes in the open waiting to get boarding passes scanned and get on a bus. Duty-free closed around 4-4:30. Only 1 food outlet was open and it was super slow and busy since it was serving passengers from multiple flights. So a number of passengers couldn't buy meals at the terminal. Since the flight was delayed by over 3 hours, we could have been offered snacks on-board. Nothing. The seats barely reclined. In-flight entertainment options were pitiful. Overall, a miserable experience. Never flying on Icelandair ever again. :(

Again, lines for boarding are a problem in iceland. The flight itself was fine and very smooth. No complaints. We would definitely fly icelandair again.

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

The first class seats were unusable, mine at the end of the flight, my husband's in the middle of the flight, and the one next to me was unusable either, they had to move the person to another seat.

Last minute gate change. Didn’t put our TSA global on our trip even though we asked multiple times to confirm. Did not help with food when could not eat what was served.

The cabin was bit colder than I like but the crew members looked after us very well. They did even offer hot water bottle and hot chocolate. I cannot rate the crew enough excellent is not good enough. They really were wonderful.

Boarding is always a challenge as folks in al groups crowd around for no reason, but crew handled it well. I once again applaud the LHR ground baggage staff as they got our bags from a flight at Terminal 5A to a flight in Terminal 5C within 40 minutes...amazing!

This flight from London to Chicago was actually on an AA airline. I did book through BA but the flight was AA. Great flight, hectic in Chicago, I wouldn't choose to fly through Chicago again, but that's not the airlines fault. The flight itself was great.

Push back is not working when I complaint a male staff he told me that most of the seats are like that so we can’t do anything

Seats were way too small. I got claustrophobic waiting for trash from meal to be taken away. I couldn't move to even close my tray until trash was taken.

Boarding was fairly chaotic. One of your employees clipped my ankle as he was passing with an empty wheelchair and not only did not apologize but stated something to the effect of “oh forGod’s sake.” There was plenty of room for him to pass. otherwise, everything was excellent.

Fantastic! Great seats! Friendly staff! Amazing selection of shows and movies! Smooth ride! I don’t know what more I could have asked for honestly. They made flying a breeze this time around.

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