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Cheap flights from London Heathrow Airport to Washington, D.C. from £320

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — WAS
3 Sep — 10 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. are usually found in January or September, booked 78 days in advance, depart on a Friday or Thursday and return on a Tuesday

Cheap flight deals from Heathrow to Washington, D.C.

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Washington, D.C.
Explore the most affordable flight options available from Heathrow to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 August 2026.

Mi 9/913:05
LHR
-
IAD
1 stop11h 15m
Icelandair
Sa 19/920:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Deal found 2/8£431
So 18/1009:30
LHR
-
IAD
1 stop11h 35m
United Airlines
Sa 31/1016:30
IAD
-
LHR
1 stop14h 50m
United Airlines
Deal found 3/8£432
Mi 16/908:40
LHR
-
DCA
2 stops16h 19m
Air Canada
Mi 23/912:55
DCA
-
LHR
2 stops16h 05m
Air Canada
Deal found 3/8£432
Mo 31/821:25
LHR
-
IAD
1 stop29h 50m
Icelandair
Do 10/920:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Deal found 31/7£433
So 6/909:15
LHR
-
DCA
1 stop11h 43m
British Airways
So 27/916:59
DCA
-
LHR
1 stop10h 01m
British Airways
Deal found 3/8£433
Do 5/1109:00
LHR
-
IAD
2 stops16h 10m
Air Canada
Mi 18/1109:55
IAD
-
LHR
2 stops16h 15m
Air Canada
Deal found 3/8£433
Fr 2/1009:30
LHR
-
DCA
1 stop11h 10m
Air Canada
Fr 9/1012:40
DCA
-
LHR
2 stops12h 50m
Air Canada
Deal found 3/8£433
Fr 4/913:05
LHR
-
IAD
1 stop14h 10m
Icelandair
Do 10/920:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Deal found 2/8£434
Do 17/906:00
LHR
-
DCA
2 stops17h 15m
Air Canada
Do 24/912:55
DCA
-
LHR
2 stops16h 05m
Air Canada
Deal found 3/8£434
Mo 31/806:00
LHR
-
IAD
1 stop13h 35m
Austrian Airlines
Mo 7/922:15
IAD
-
LHR
Nonstop7h 25m
Austrian Airlines
Deal found 31/7£435
Do 3/921:25
LHR
-
IAD
1 stop26h 55m
Icelandair
So 13/920:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Deal found 2/8£436
Do 3/914:05
LHR
-
DCA
1 stop12h 43m
Air Canada
Do 10/912:55
DCA
-
LHR
1 stop12h 35m
Air Canada
Deal found 3/8£436

Find flight deals from Heathrow to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 August 2026.

Round-trip from

£431

One-way from

£320

Popular in

June

Cheapest in

January

Average price

£546

Good round-trip deal

£510 or less

Good one-way deal

£361 or less
Icelandair
  • Icelandair
  • 9/9-19/9
  • 2 total stops
  • 21h 40m total
  • London to Washington, D.C.
Search Deals
Icelandair
  • Icelandair
  • 22/10
  • 1 total stop
  • 27h 00m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£30 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from London Heathrow to Washington, D.C. (WAS).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 4 August 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fr 6/11

09:00-20:10

2 stops16h 10m

Washington, D.C. Dulles Intl

Di 10/11

12:39-07:10

2 stops13h 31m

£433

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

So 13/9

06:30-15:10

1 stop13h 40m

Washington, D.C. Dulles Intl

Mo 14/9

22:05-10:40

Nonstop7h 35m

£440

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Di 1/12

13:10-21:20

1 stop13h 10m

Washington, D.C. Reagan-National

Do 10/12

18:30-09:10

1 stop9h 40m

£444

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fr 4/9

09:30-16:05

1 stop11h 35m

Washington, D.C. Dulles Intl

Mo 7/9

18:30-06:55

Nonstop7h 25m

£445

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Do 24/9

08:30-15:10

1 stop11h 40m

Washington, D.C. Dulles Intl

Mi 28/10

19:20-06:40

Nonstop7h 20m

£447

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Di 1/12

12:05-15:40

Nonstop8h 35m

Washington, D.C. Dulles Intl

Do 10/12

22:15-10:50

Nonstop7h 35m

£449

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sa 31/10

07:30-15:35

1 stop12h 05m

Washington, D.C. Dulles Intl

Di 10/11

12:36-07:10

2 stops13h 34m

£450

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

So 6/9

06:50-13:30

1 stop11h 40m

Washington, D.C. Dulles Intl

Fr 25/9

15:45-06:30

1 stop9h 45m

£453

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Fr 16/10

09:30-21:50

1 stop17h 20m

Washington, D.C. Reagan-National

Sa 24/10

12:40-07:30

2 stops13h 50m

£456

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mo 14/9

09:50-15:45

1 stop10h 55m

Washington, D.C. Dulles Intl

Mo 21/9

22:25-10:50

Nonstop7h 25m

£462

Flights are sorted by cheapest return flights first.

Deals found on 30/7

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Heathrow to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Washington, D.C.

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

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. (average of £473). Flying from London Heathrow Airport to Washington, D.C. in August is currently the most expensive (average of £581). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to WAS?

Find hourly flight availability from Heathrow to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 August 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Washington, D.C. as you normally would.

Weekly flight availability from London Heathrow Airport to Washington, D.C.

Explore weekly flight availability from Heathrow to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 4 August 2026.

The most flights from LHR to WAS are scheduled on a Monday (30 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (22 on average).

How much does it cost for a return flight from London Heathrow Airport to Washington, D.C.?

Airfare is below average for this route at the moment.
London Heathrow Airport to Washington, D.C. flights typically cost between £487 and £667 in September.
The cheapest return price found within the last 5 days was £431 on Icelandair (9 Sept–19 Sept).

What’s the top stopover airport for flights from London Heathrow Airport to Washington, D.C.?

Share of one-stop return flights from London Heathrow Airport to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Dublin (DUB) – chosen by Cheapflights users on 44% of one-stop itineraries from London Heathrow Airport to Washington, D.C. on Cheapflights.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Washington, D.C.?

Average return fare for one-stop flights from London Heathrow Airport to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £424.

What’s the fastest stopover option from London Heathrow Airport to Washington, D.C.?

Shortest average travel time for one-stop one-way flights from London Heathrow Airport to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Newark (EWR) have the shortest average one-way travel time for one-stop routes: 11h 08m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Washington, D.C.?

Average stopover duration for one-stop one-way flights from London Heathrow Airport to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Charlotte (CLT) offer the fastest connection on this route, with an average stopover time of 1h 14m.

How often are flights from London to Washington, D.C. delayed?

About 17% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 141 minutes.

What is the most punctual flight time for London to Washington, D.C. flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Washington, D.C. flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 11% of flights being delayed.

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

The best time to book flights from London Heathrow Airport to Washington, D.C. is 81 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated 4 August 2026.
Read through reviews of airlines operating flights from London Heathrow Airport to Washington, D.C., such as Virgin Atlantic,United Airlines, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Food

6.9

Overall

7.5

Crew

8.1

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
694 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Food

6.9

Overall

7.5

Crew

8.1

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
United Airlines
7.4
Good
10,059 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Food

6.9

Overall

7.5

Crew

8.1

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Icelandair
6.9
Okay
720 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Food

6.9

Overall

7.5

Crew

8.1

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Lufthansa
6.8
Okay
8,177 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Food

6.9

Overall

7.5

Crew

8.1

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
8,147 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Food

6.9

Overall

7.5

Crew

8.1

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London Heathrow Airport to Washington, D.C.?

    For as low as £444, Air Canada can have you in Washington, D.C. from London Heathrow Airport in 13h 10m. There are 3652 mi between London Heathrow Airport and Washington, D.C.. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from London Heathrow Airport to Washington, D.C. round-trip?

    According to our current data, Icelandair (£327), Aer Lingus (£363), and TAP AIR PORTUGAL (£382) offers the cheapest pricing from London Heathrow Airport to Washington, D.C.. Icelandair is currently priced 37% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from London Heathrow Airport to Washington, D.C. one-way?

    The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as £344. However, be on the lookout for offers from JetBlue and Aer Lingus, as they are both options that can get you from London Heathrow Airport to Washington, D.C. for a low price.

  • What are the most popular routes from London Heathrow Airport to Washington, D.C.?

    When deciding which route to take from London Heathrow Airport to Washington, D.C. consider London Heathrow - Washington, D.C. Dulles Intl, London Heathrow - Baltimore/Washington or London Heathrow - Washington, D.C. Reagan-National as they are the most popular.

  • What are the most reliable airlines from London Heathrow Airport to Washington, D.C.?

    Consider Air Canada (83%), Austrian Airlines (83%) or Copa Airlines (83%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Washington, D.C..

  • What are the cheapest flights from London Heathrow Airport to Washington, D.C.?

    Looking for the cheapest flight from London Heathrow Airport to Washington, D.C.? While on average our users pay £1,633, our data indicates the cheapest price to be £409. The most popular route (London Heathrow - Washington, D.C. Dulles Intl), is priced around £303.

  • Can I find deals for flights from Heathrow to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Heathrow to Washington, D.C. flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Washington, D.C..

  • Can I find deals for business class flights from Heathrow to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Heathrow to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. (average of £473). Flying from London Heathrow Airport to Washington, D.C. in August is currently the most expensive (average of £581). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Silver Spring
Gaithersburg
Oxon Hill
Hanover
Woodbridge
Springfield
Alexandria

Browse thousands of different options on Cheapflights for your next trip

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Fly from Heathrow to Washington, D.C. on these airlines

Choose from the following airlines for your flight from Heathrow to Washington, D.C.. Flights are based on user searches made on Cheapflights and were last updated on 4 August 2026.
British Airways flights from London Heathrow to Washington, D.C.
Virgin Atlantic flights from London Heathrow to Washington, D.C.
Finnair flights from London Heathrow to Washington, D.C.

Top 10 airlines flying from Heathrow to Washington, D.C.

Discover the top 10 airlines that operate flights from Heathrow to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 4 August 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£327Average£425FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£332Average£524FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£363Average£592FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
KLMCheapest£380Average£563FlexibilityNo cancel feeOn-time75%
Search KLM flights
TAP AIR PORTUGALCheapest£382Average£449FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
LufthansaCheapest£404Average£563FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£405Average£538FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£405Average£550FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£407Average£647FlexibilityNo cancel feeOn-time77%
Search Air France flights
Scandinavian AirlinesCheapest£408Average£476FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Washington, D.C.?

Cheapflights makes it easy to find Heathrow to Washington, D.C. flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Washington, D.C.?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Washington, D.C. from Heathrow.

Can Cheapflights find flights from Heathrow to Washington, D.C. with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to Washington, D.C. flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Heathrow to Washington, D.C. become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Washington, D.C. flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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