LHR - WAS

$357 Find Cheap Flights from London Heathrow Airport to Washington, D.C.

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Washington, D.C. departing on 3/4. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C.

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Washington, D.C..
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Washington, D.C..
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Everything you should know

Cheapest round-trip
$543
Overall average: $661
Austrian Airlines
dom. 2/22jue. 3/5
LHR - IAD • 1 stop
Cheapest non-stop
$557
Typical prices: $642-$796
British Airways
vie. 3/13vie. 3/20
LHR - IAD • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
British Airways' premium economy offers more space.
Heathrow's security lines can be long; arrive early.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Austrian Airlines
Cheapest • from $543 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
LHR
-
IAD
Cheapest • 2% average savings
LHR
-
IAD
Most popular
Insights
Insights
Insights
Insights
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 30% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 12% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Washington, D.C.!
Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Heathrow to Washington, D.C. (LHR-WAS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Heathrow to Washington, D.C. 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 Heathrow to Washington, D.C.

dom., feb. 22 - jue., mar. 5
Austrian Airlines Logo
6:00 am - 2:40 pm
LHR
-
IAD
13h 40m
1 stop
Austrian Airlines Logo
6:20 pm - 6:40 am
IAD
-
LHR
7h 20mnonstop
$543Austrian Airlines
mié., feb. 25 - mar., mar. 3
Austrian Airlines Logo
9:05 am - 2:40 pm
LHR
-
IAD
34h 35m
1 stop
Austrian Airlines Logo
10:15 pm - 10:50 am
IAD
-
LHR
7h 35mnonstop
$544Austrian Airlines
lun., feb. 23 - lun., mar. 2
Icelandair Logo
8:35 pm - 6:40 pm
LHR
-
BWI
27h 05m
1 stop
Icelandair Logo
7:40 pm - 10:50 am
BWI
-
LHR
10h 10m
1 stop
$544Icelandair
mié., feb. 18 - jue., mar. 26
United Airlines Logo
6:30 am - 3:50 pm
LHR
-
IAD
14h 20m
1 stop
United Airlines Logo
6:00 am - 9:20 pm
IAD
-
LHR
11h 20m
1 stop
$545United Airlines
lun., mar. 2 - vie., abr. 17
Icelandair Logo
8:35 pm - 6:40 pm
LHR
-
BWI
27h 05m
1 stop
Icelandair Logo
8:30 pm - 11:55 am
BWI
-
LHR
10h 25m
1 stop
$545Icelandair
mar., mar. 3 - mié., mar. 11
Air Canada Logo
6:50 am - 3:31 pm
LHR
-
DCA
13h 41m
2 stops
Air Canada Logo
12:55 pm - 9:20 am
DCA
-
LHR
16h 25m
1 stop
$545Air Canada
mar., mar. 10 - mar., mar. 17
United Airlines Logo
9:00 am - 5:40 pm
LHR
-
IAD
12h 40m
1 stop
United Airlines Logo
1:02 pm - 7:10 am
IAD
-
LHR
14h 08m
2 stops
$546United Airlines
mar., mar. 10 - mar., mar. 17
Air Canada Logo
9:00 am - 10:35 pm
LHR
-
DCA
17h 35m
2 stops
Air Canada Logo
4:15 pm - 7:10 am
DCA
-
LHR
10h 55m
1 stop
$546Air Canada
jue., feb. 26 - mar., mar. 3
Icelandair Logo
12:15 pm - 6:40 pm
LHR
-
BWI
11h 25m
1 stop
Icelandair Logo
7:40 pm - 10:50 am
BWI
-
LHR
10h 10m
1 stop
$546Icelandair
mié., abr. 15 - mié., abr. 29
Multiple Airlines Logo
8:40 am - 4:45 pm
LHR
-
IAD
13h 05m
1 stop
Multiple Airlines Logo
6:25 pm - 6:55 am
IAD
-
LHR
7h 30mnonstop
$547Multiple Airlines
Booking Insights

KAYAK's insights & trends for Heathrow to Washington, D.C. flights

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

What is the cheapest London Heathrow Airport to Washington, D.C. flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from London Heathrow Airport to Washington, D.C. costs $539 on the route between London Heathrow Airport (LHR) and Washington, D.C. Dulles Intl Airport (IAD). Over the past month, this route was, on average, 2% cheaper than other London Heathrow Airport-Washington, D.C. routes. It is also the most popular route.

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

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

If you are looking for a flight deal from London Heathrow Airport to Washington, D.C., look for departures on Thursdays and avoid leaving on a Tuesday, as it's usually the priciest day. When flying back from Washington, D.C., Wednesday is the cheapest day to fly and Saturday is the most expensive.

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

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, D.C., 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, D.C. is January, where tickets cost $644 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $909 and $805 respectively.

Can I save money by flying with a layover from London Heathrow Airport to Washington, D.C.?

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 $682, prices are generally cheapest when you fly direct.

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

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, D.C., 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, D.C., you should book around 4 weeks before departure, which saves you about 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Expert advice

Expert advice for your flight from Heathrow to Washington, D.C.

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Iberia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Duncan Madden

Duncan Madden

Expert on British Airways and LHR

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Stefanie Waldek

Stefanie Waldek

Expert on United Airlines, Delta and IAD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Laura Ratliff

Laura Ratliff

Expert on Virgin Atlantic

Laura Ratliff is a New York-based writer and editor. She lives in downtown Brooklyn with her husband and their beloved dogs. Originally from Texas, she now considers New York City her home. She typically spends more than 200,000 miles on a plane each year and stays in plenty of hotels.

Good to know

Low seasonJanuary
Cheapest flight$357
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 23% increase in price.
Flight from London Heathrow Airport to Baltimore

When to book flights from Heathrow to Washington, D.C.

Are your dates flexible? Find out the best times to travel from Heathrow to Washington, D.C. 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 London Heathrow Airport to Washington, D.C. flights

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

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to Washington, D.C. was $357 for a one-way ticket and $543 for a round-trip.

  • Do I need a passport to fly between London Heathrow Airport and Washington, D.C.?

    A passport is required to fly from London Heathrow Airport to Washington, D.C..

  • Which airports will I be using when flying from London Heathrow Airport to Washington, D.C.?

    On your way to Washington, D.C., you’ll fly out from London Heathrow. You’ll be landing in one of Washington, D.C.’s 2 airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl.

  • Which airlines offer Wi-Fi service onboard planes from London Heathrow Airport to Washington, D.C.?

    Only KLM offers inflight Wi-Fi service on the London Heathrow Airport to Washington, D.C. flight route.

  • Which aircraft models fly most regularly from London Heathrow Airport to Washington, D.C.?

    The Boeing 777 is the aircraft model that flies most regularly on the London Heathrow Airport to Washington, D.C. flight route.

  • Which airline alliances offer flights from London Heathrow Airport to Washington, D.C.?

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

  • On which days can I fly direct from London Heathrow Airport to Washington, D.C.?

    There are nonstop flights from London Heathrow Airport to Washington, D.C. on a daily basis.

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

    The two airlines most popular with KAYAK users for flights from London to Washington, D.C. are Delta and Virgin Atlantic. With an average price for the route of $867 and an overall rating of 7.9, Delta is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of $889 and an overall rating of 7.5.

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

    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, D.C..

  • 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, D.C.?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from London Heathrow 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 London Heathrow Airport to Washington, D.C.?

    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 Washington, D.C. with an airline and back to London Heathrow Airport 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, D.C.?

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

KAYAK’s top tips for finding a cheap flight from London Heathrow Airport to Washington, D.C.

  • Looking for a cheap flight? 25% of our users found flights on this route for $658 or less one-way and $661 or less round-trip.

Prefer to fly direct from London Heathrow Airport to Washington, D.C.?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from London Heathrow to Washington, D.C..
Find which airlines fly direct from London Heathrow Airport to Washington, D.C., which days they fly and book direct flights.

Direct departures

London Heathrow to Washington, D.C.

Monday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Tuesday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Wednesday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Thursday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Friday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Saturday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Sunday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

See more direct flights

Direct returns

Washington, D.C. to London Heathrow

Monday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Tuesday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Wednesday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Thursday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Friday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Saturday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

Sunday

British Airways, United Airlines, Virgin Atlantic

British Airways, United Airlines, +1 more

See more direct flights

Reviews of the top 5 airlines serving from Heathrow to Washington, D.C.

 
See real verified KAYAK customer reviews for airlines flying from London to Washington, D.C.. 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, D.C.? 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.
7.9
DeltaOverall score based on 8118 reviews
7.8Entertainment
7.9Comfort
7.2Food
8.1Boarding
8.5Crew
Airline reviews

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

2.0 MediocreJulia, Jan 2026
MSP - BOS
Read more Delta reviews

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Very convenient considering that is a non-stop flight, but the Aeromexico still has old model planes, so the entertainment was very poor and the space for carry-on luggage was very limited.

Flight taking off must have been behind, because there was no pre-departure drink for first class like normal. Also, person in front of mine’s seat got stuck in the as far back as it normally goes position for the whole flight even during landing, flight attendant unable to fix it. Gate was not empty when we arrived, but that is MSP’s fault since was overdue for push back, not Delta’s, so had to sit on tarmac for a while and international flight so then still had to go through customs. Flight crew was excellent throughout though!

Flight from MEX to ATL had to divert to Tampa. When we got off the plane, there were non directions on what to do. Nearly 30 minutes just standing around. Finally told to go through security with no boarding passes, and turned away. Then told to to go back. Took forever to leave Tampa for ATL. Missed my connection to Harrisburg.

This long-haul international flight was the most comfortable among any of the same kind of flight operated by an American-headquartered airline - second to none!

I've flown several other airlines, and Delta is really on top on things.

Food has been disappointing in both legs of flight to india

Great staff great experience, made a 2 hour delay very bearable

Great staff, great experience, made a 2 hour delay very bearable

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Great crew - old style upper class seats on the older fleet now feels dated

Premium economy more comfortable than economy, but not by much. Did was awful, do not try the omelette. Flight crew were helpful. Flight was delayed by over an hour. Overall but bad, arrived safely and thank God.

Good crew. Boarding delays. Almost two hours wait for the bags in DC.

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

The seats were comfortable and we had leg room. Great entertainment.

The flight crew where really good. Better then the crew from BNE to SFO

Safe made to destination. Late to start at GVA for icy reasons but we fought our next fly.

Miserable. They moved my seat, but canceled the next leg of my flight. I resolved the issue at my transfer, but that resulted in lost luggage that has taken days off my schedule with no resolution. Worse, they fail to interface effectively with Lufthansa, forcing me to bounce between two equally useless help desks. The apps are unable to handle the situation, the bag dropped off the tracker, and while the call centers are polite, they do not provide written information to assist with cross-airline communication.

l really enjoy very much the flight was very pleasant

The flight was delayed for 1:30 hours for maintenance issues. They should give more information about connecting flights. For a Business Cabin the Crew was mediocre.

Staff on board was excellent. Positive upbeat helpful- like it used to be.

The flight attendant use 1.5 hours to answer my call. My dirty food tray was unattended.

The flight was completely full. Crew was not happy. Everyone was rude and brusque. Travelling with an arm in a cast and seating in the first row of economy cabin (in front of the separation) I needed help retrieving my tray for the meal. A staff member literally threw the tray on my lap, without helping to take out the tray. Boarding was messy, with 300 people waiting in an encloses space with low ceiling. I will try to avoid AA next time I have a long flight.

Concern Regarding Significant Gate Delay and Jet Bridge Issue Dear Customer Relations Team, I am writing to express my disappointment with the experience I had on my recent flight AA 2414 on Sunday January 18, 2026. What should have been a routine departure turned into a frustrating and avoidable delay due to an issue with the jet bridge at the gate. As a result, the flight was delayed by approximately 90 minutes while multiple gate changes were attempted. The lack of clear communication during this period made the situation even more challenging. Passengers were left uncertain about the cause of the delay, the expected timeline, and the next steps. This not only disrupted travel plans but also created unnecessary stress for everyone on board. I understand that operational issues can arise, but a malfunctioning jet bridge and the resulting extended delay suggest an area where procedures or equipment maintenance may need attention. I hope you will review this incident to prevent similar disruptions in the future. I would appreciate acknowledgment of this concern and consideration of appropriate compensation for the inconvenience and lost time caused by this delay. Thank you for taking the time to review my experience. I look forward to hearing from you. Sincerely, Dion Dillard

I got sick nothing contagious but distressing enough and the care I received on the flight was astounding.

Horrible. Both legs of my flight were delayed more than 6 hours. No compensation, no screens on the plane, and the plane was not clean.

The business class seats are dated and uncomfortable. The space is bare minimum and there is absolutely no privacy. For $4K, this is not what I expect.

Flight, food and crew were all good, friendly and very satisfactory.

Lost luggage after 2 days no word leaving on cruise no stuff or clothes

Staff's did their best to make everyone comfortable and I appreciate them for it

Pathetic check in experience once again. Not enough staff scheduled at bag drop or for special assistance at LHR. Really need to rethink the whole self check in procedure. The crew was good. A very decent selection of special meals in this leg as compared to the JFK-LHR leg.

My touch screen at my seat wasn't working, the films BA advertised on the website for this flight were not available, and the plane was a little dated, food was good and the staff were good, just let down by the aircraft facilities.

Did not like the seating configuration at all with 2+3+2 in business class. Lacking total privacy and comfort

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Entertainment devices on A380 need to be fixed, the seats might do with updates.

Everything. Employees offered to help me because I had to use a cane.

Check-in and boarding were great. On flight staff were rude and disrespectful. Paid for extra room and found it incredibly cramped. Bathrooms kept in poor condition. Overall negative experience.

My seat cushion was poor. The cushion was compressed and was uncomfortable for such a long flight.

I was in a bulkhead seat and my tray table wasn't level. Eating was difficult.

Everything you need to know for your flight from Heathrow to Washington, D.C.

Information on your arrival and departure airports